I'm trying to make a program to calculate the y component of a user-input number for 7 different aspect ratios. This is probably a simple problem somewhere in the declarations at the top, but I have very little experience with c++. I am writing in xcode. Thanks!
I'm getting the following error messages:
19:13: Invalid operands to binary expression ('std::__1::basic_istream' and '')
32:6: Expected unqualified-id
//
// aspect1.cpp
// aspectRatioCalculator
//
#include <iostream>
using namespace std;
int main()
{
int a;
cout << "Enter a number to calculate its complements at multiple aspect ratios." << endl;
cin>> a >> endl;
int b = (a*9)/17;
int c = (a*9)/16;
int d = (a*5)/8;
int e = (a*4)/5;
int f = (a*3)/5;
int g = (a*3)/4;
int h = (a*2)/3;
cout << "17:9 | " << a << ":" << b << endl;
cout << "16:9 | " << a << ":" << c << endl;
cout << " 8:5 | " << a << ":" << d << endl;
cout << " 5:4 | " << a << ":" << e << endl;
cout << " 5:3 | " << a << ":" << f << endl;
cout << " 4:3 | " << a << ":" << g << endl;
cout << " 3:2 | " << a << ":" << h << endl;
}
std::endl is an output manipulator. It isn't meant to be used with input streams (which are used for input). Change this: cin >> a >> endl; to cin >> a; cout << endl;.
Related
I am making a hangman game on my own and I have ran into a problem where I need to know if the guess is in the secret word. if it is I will change the bool innum to true, if it is not it will stay false. i have looked it up and cannot find anything that works. also the name printe is just the name of the string its just what I've named it.
here is the code I am working with:
using namespace std;
#include <iostream>
#include <conio.h>
void title();
void rightanswer();
void try1();
void try2();
void try3();
void try4();
void try5();
void try6();
void spacer();
int main()
{
bool innum = false;
int printe = 0, attempts_wrong = 0, trynum = 6;
char guess;
string secretword, hint1, hint2;
title();
// the welcoming senteces
cout << "Welcome to HANG MAN\n\n" << endl;
cout << "Please enter the secret word (no spaces): ";
cin >> secretword;
// the hints
cout << "\nenter the first hint: ";
cin >> hint1;
cout << "\nenter the second hint: ";
cin >> hint2;
//explanation for hints
cout << "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"; //so guesser cant see word
cout << "\nthe hints will be used as the guesser runs out of attemptts" << endl;
cout << "the first hint will be used immediately\n\n" << endl;
cout << "press any button to start...";
_getch();
cout << "\n\n" << endl;
for (int i = 0; secretword[i] != '\0'; ++i)
{
printe++;
}
rightanswer();
cout << "\nyour word is " << printe << " letters long" << endl;
if (attempts_wrong == 0)
{
cout << "your first hint is: ";
cout << hint1 << endl;
}
if (attempts_wrong == 3)
{
cout << "your second hint is: ";
cout << hint2 << endl;
}
cout << "enter a letter: ";
cin >> guess;
// im gonna have the code go here
// <-----------------------------
if (innum == true)
{
spacer();
cout << guess << " is in the secret word" << endl;
rightanswer();
}
else if (innum == false)
{
spacer();
cout << guess << " is not in the secret word" << endl;
rightanswer();
attempts_wrong++;
}
return 0;
}
void title() {
cout << "*****************************************" << endl;
cout << "* _____ *" << endl;
cout << "* | | /\\ |\\ | | *" << endl;
cout << "* |_____| /__\\ | \\ | | ___ *" << endl;
cout << "* | | / \\ | \\ | | | *" << endl;
cout << "* | | / \\| \\| |_____| *" << endl;
cout << "* *" << endl;
cout << "* |\\ /| /\\ |\\ | *" << endl;
cout << "* | \\ / | /__\\ | \\ | *" << endl;
cout << "* | \\ / | / \\ | \\ | *" << endl;
cout << "* | V | / \\| \\| *" << endl;
cout << "* *" << endl;
cout << "*****************************************" << endl;
}
//head, body, 2 arms, 2 legs - 6 in total
void rightanswer() {
//if the guess is right and the start
cout << " ___ " << endl;
cout << " | | " << endl;
cout << " | " << endl;
cout << " __|__ " << endl;
}
void try1() {
cout << " ___ " << endl;
cout << " | | " << endl;
cout << " O | " << endl;
cout << " | " << endl;
cout << " __|__ " << endl;
}
void try2() {
cout << " ___ " << endl;
cout << " | | " << endl;
cout << " O | " << endl;
cout << " | | " << endl;
cout << " __|__ " << endl;
}
void try3() {
cout << " ___ " << endl;
cout << " | | " << endl;
cout << " O | " << endl;
cout << " /| | " << endl;
cout << " __|__ " << endl;
}
void try4() {
cout << " ___ " << endl;
cout << " | | " << endl;
cout << " O | " << endl;
cout << " /|\ | " << endl;
cout << " __|__ " << endl;
}
void try5() {
cout << " ___ " << endl;
cout << " | | " << endl;
cout << " O | " << endl;
cout << " /|\ | " << endl;
cout << " / __|__ " << endl;
}
void try6() {
cout << " ___ " << endl;
cout << " | | " << endl;
cout << " O | " << endl;
cout << " /|\ | " << endl;
cout << " / \__|__ " << endl;
cout << " YOU LOSE" << endl;
cout << "you have run out of guesses";
exit(0);
}
// it creates a line to differ one try from the other
void spacer() {
cout << "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" << endl;
}
I don't know how much to show so that is all of it, its probably not the best but it works. I know that I don't some of the voids functions at the bottom but it works for now. if you have any suggestions tell me them. also don't be to harsh, I'm a beginner.
There are a few ways of approaching this. If you actually want to simply find if a string contains a character, the following works:
char needle;
haystack.find(needle) != string::npos;
As others have correctly answered. However, in this case, I think you are looking for something slightly different. Its a game of hangman so what you actually may want to do is show the portions of the word that the individual has actually guessed correctly.
Efficient
If we assume that: display is a string initialised with _ (or some character that is not a valid letter in a guessable word) as each character to the length of the string, you can work with this to partially display it.
If we have a map<char, vector<size_t>> that tells us exactly the indices that each character occurs at, which is easy to compute, we can take the guess and iterate through the corresponding vector of indices and replace characters in display with the actual character and then remove the character from the map. Once the map is empty, then the entire string has been guessed. You may also want to maintain a set of characters that have already been guessed to ensure that the same character can only be guessed once.
I will leave it as an exercise for you to implement this as it shouldn't be too difficult. If you'd like some pointers, let me know.
Less Efficient
This second way is less efficient, but since its a real-time game it won't make a difference unless these strings are really long.
Simply hold a copy of the string and iterate through it. Every time check which character you are checking against then replace the character at the index you are at in the _ word with the correct character. You can also keep a flag which checks whether or not any replacements happen and if not, you know that the character does not exist in the word.
You may use std::string::find method to find the given character (returns the position of the character or std::string::npos if it is not found): http://www.cplusplus.com/reference/string/string/find/
Example:
std::string str = "Hello.World";
auto found = str.find('.');
if (found != std::string::npos)
std::cout << "Period found at: " << found << std::endl;
In your case, it could look as such:
innum = (secretword.find(guess) != std::string::npos);
Try string.find.
auto i =secretword.find(guess); gives you the index. If it equals std::string::npos it isn't there.
Also, std::string has a size() method you can rrplace your letter counting with.
I'm new to C++. I have been following an online course that teaches you how to make a Hangman game in C++. For the most part the code was working, every time I debugged it ran fine. I completed the entire code and double checked it, but I'm getting an error on one of the 'else' the errors I'm getting is "error C2181: illegal else without matching if.
Here's my code.
// Hangman game
// CN
// Header file
#include "stdafx.h"
// Input/Output
#include <iostream>
// Text
#include <string>
// Information storage
#include <vector>
// Figuring out the information storage
#include <algorithm>
// Converts lower cased letters to higher case letters
#include <cctype>
// Reads computers time and distributes a word from a list accordingly
#include <ctime>
// Library for system
#include <cstdlib>
using namespace std;
int main()
{
// Constant data type which is a fixed value, MaxWrong in Pascal Text and the max number of guesses.
const int MaxWrong = 6;
vector<string> words;
words.push_back("SANTA CLAUSE");
words.push_back("REINDEER");
words.push_back("PRESENT");
words.push_back("TREE");
words.push_back("MILK");
words.push_back("COOKIE");
// Parenthesis must always match
srand(static_cast<unsigned int>(time(0)));
random_shuffle(words.begin(), words.end());
const string theWord = words[0];
int wrong = 0;
string soFar(theWord.size(), '_');
string used = "";
cout << "\n******** Welcome to Chaye's Hangman ********\n\n";
cout << " __ \n";
cout << " | | \n";
cout << " | \n";
cout << " | \n";
cout << " | \n";
cout << " | \n";
cout << " ___|____ \n\n";
cout << " Do Your Best Human \n\n";
// Loop
while ((wrong < MaxWrong) && (soFar != theWord))
{
cout << "\n You have " << (MaxWrong - wrong);
cout << " incorrect tries left.\n";
cout << "\n You've used these letters:\n" << used << endl;
char guess;
cout << "\n\n Enter your guess: ";
cin >> guess;
guess = toupper(guess);
while (used.find(guess) != string::npos)
{
cout << "\n You've already tried " << guess << endl;
cout << " Enter your guess: ";
cin >> guess;
guess = toupper(guess);
}
used += guess;
if (theWord.find(guess) != string::npos)
{
cout << " That's right " << guess << " is in the word,\n";
for (int i = 0; i < theWord.length(); ++i)
{
if (theWord[i] == guess)
{
soFar[i] = guess;
}
}
}
else
{
cout << " sorry. " << guess << " isn't in the word.\n";
++wrong;
}
// If one is wrong
if (wrong == 1)
{
cout << " __ \n";
cout << " | | \n";
cout << " | O \n";
cout << " | \n";
cout << " | \n";
cout << " | \n";
cout << " ___|____ \n\n";
cout << " Do Your Best Human \n\n";
}
else
{
cout << endl;
}
// If one is wrong
if (wrong == 2)
{
cout << " ___ \n";
cout << " | | \n";
cout << " | O \n";
cout << " | # \n";
cout << " | \n";
cout << " | \n";
cout << " ___|____ \n\n";
cout << " Do Your Best Human \n\n";
}
else
{
cout << endl;
}
// If one is wrong
if (wrong == 3)
{
cout << " ___ \n";
cout << " | | \n";
cout << " | O \n";
cout << " | /# \n";
cout << " | \n";
cout << " | \n";
cout << " ___|____ \n\n";
cout << " Do Your Best Human \n\n";
}
else
{
cout << endl;
}
// If one is wrong
if (wrong == 4)
{
cout << " ___ \n";
cout << " | | \n";
cout << " | O \n";
cout << " | /#\ \n";
cout << " | \n";
cout << " | \n";
cout << " ___|____ \n\n";
cout << " Do Your Best Human \n\n";
}
else
{
cout << endl;
}
// If one is wrong
if (wrong == 5)
{
cout << "\n You've been hung \n";
cout << " ___ \n";
cout << " | | \n";
cout << " | O \n";
cout << " | /#\ \n";
cout << " | / \n";
cout << " | \n";
cout << " ___|____ \n\n";
cout << " Do Your Best Human \n\n";
}
else
{
cout << "\n I'm suprised you've got this far\n";
}
cout << "\n The word was " << theWord << endl;
}
// If one is wrong
if (wrong == MaxWrong)
{
cout << "\n You've been hung \n";
cout << " ___ \n";
cout << " | | \n";
cout << " | O \n";
cout << " | /#\ \n";
cout << " | / \ \n";
cout << " | \n";
cout << " ___|____ \n\n";
cout << " Do Your Best Human \n\n";
}
else
{
cout << "\n I'm suprised you've got this far\n";
}
cout << "\n The word was " << theWord << endl;
// Pause Console
system("pause");
// Kills the application once done
return 0;
}
There should be no semicolon in this line:
if (theWord.find(guess) != string::npos);
this semicolon terminates the whole if statement and the following {...} block is executed unconditionally. Following else is therefore no longer matched with the if statement.
And you are also missing closing ) bracket in your while statement:
while (used.find(guess) != string::npos
{
...
}
Change
** else **
to
else
Your compiler is interpreting that as an operator. If it still fails, edit your post w/ the error. Also worth noting, if you compile w/ the -g flag you get some debug output which can be beneficial.
I'm trying to sort alphabetically by team for my program, but not having any luck. If there is any hints or advice out there I would appreciate it. Below is the program I have minus the data input. Basically I just want to know how I would go about specifically sorting only by team in alphabetical order.
nflrecievers data[100];
ifstream fin;
fin.open("data.txt");
ofstream fout;
fout.open("validationReport.txt");
int i = 0;
while(!fin.eof())
{
fin >> data[i].fname >> data[i].lname >> data[i].team >> data[i].rec >> data[i].yards >> data[i].avgyrds_percatch >> data[i].tds >> data[i].longest_rec >> data[i].recpasttwenty_yrds >> data[i].yrds_pergame >> data[i].fumbles >> data[i].yac >> data[i].first_dwns ;
i = i + 1;
}
int a;
int b;
cout << " Select NFL Receivers Statistics. Input 1-4 " << endl;
cout << " 1) Receivers with 25+ Rec and 300+ Yards. " << endl;
cout << " 2) Recievers with 3+ TDs and 3+ Rec over 20 Yards. " << endl;
cout << " 3) Recievers with 100+ Yards per game and 15+ First Downs. " << endl;
cout << " 4) Veiw Total Recievers Statistics. " << endl;
cin >> a;
int c = 0;
if (a==1)
{
cout << " Receivers with 25+ Rec and 300+ Yards. " << endl;
while( c < i-1)
{
if(data[c].rec > 25 && data[c].yards > 300)
{
cout << endl;
cout << data[c].fname << " " << data[c].lname << " " << data[c].team << endl;
cout << " Rec: " << data[c].rec << " Yards: " << data[c].yards << endl;
cout << endl;
}
c++;
}
}
else if(a==2)
{
cout << " Recievers with 3+ TDs and 3+ Receptions past 20 Yards. " << endl;
while( c < i-1)
{
if(data[c].tds > 3 && data[c].recpasttwenty_yrds > 3)
{
cout << endl;
cout << data[c].fname << " " << data[c].lname << " " << data[c].team << endl;
cout << " TDs: " << data[c].tds << " Receptions past 20 Yards: " << data[c].recpasttwenty_yrds << endl;
cout << endl;
}
c++;
}
}
else if(a==3)
{
cout << " Recievers who average over 100+ yards per game and 15+ First Downs. " << endl;
while( c < i-1)
{
if(data[c].yrds_pergame > 100 && data[c].first_dwns > 15)
{
cout << endl;
cout << data[c].fname << " " << data[c].lname << " " << data[c].team << endl;
cout << " Average Yards per game: " << data[c].yrds_pergame << " First Downs: " << data[c].first_dwns << endl;
cout << endl;
}
c++;
}
}
else if(a==4)
{
cout << " Select a Reciever: " << endl;
while( c < i-1)
{
cout << c << ") " << data[c].fname << " " << data[c].lname << endl;
c++;
}
cout << " Total NFL Receivers Statistics. " << endl;
cin >> b;
cout << data[b].fname << " " << data[b].lname << endl;
cout << " Team: " << data[b].team << endl;
cout << " Receptions: " << data[b].rec << endl;
cout << " Yards: " << data[b].yards << endl;
cout << " Average Yards Per Catch: " << data[b].avgyrds_percatch << endl;
cout << " Longest Reception: " << data[b].longest_rec << endl;
cout << " Receptions over 20 Yards: " << data[b].recpasttwenty_yrds << endl;
cout << " Yards per game " << data[b].yrds_pergame << endl;
cout << " Fumbles: " << data[b].fumbles << endl;
cout << " Average Yards After Catch " << data[b].yac << endl;
cout << " Total First Downs: " << data[b].first_dwns << endl;
}
return 0;
}
std::sort(std::begin(data), std::end(data),
[](const nflrecievers& a, const nflrecievers& b) { return a.team < b.team; });
I would use std::sort
bool compare_teams(const nflrecievers &a, const nflrecievers &b) {
return a.team < b.team;
}
int i = 0;
while(!fin.eof())
{
fin >> data[i].fname >> data[i].lname >> data[i].team >> data[i].rec >> data[i].yards >> data[i].avgyrds_percatch >> data[i].tds >> data[i].longest_rec >> data[i].recpasttwenty_yrds >> data[i].yrds_pergame >> data[i].fumbles >> data[i].yac >> data[i].first_dwns ;
i = i + 1;
}
std::sort(data, data+i, compare_teams);
for (int i=0;i<c-1;i++)
for (int j=0;j<c-1;j++)
if (data[j].team>data[j+1].team)
{
nflrecievers temp = data[j];
data[j] = data[j+1];
data[j+1] = temp;
}
another solution:
int compare(const void *v1, const void *v2)
{
nflrecievers p1 = *(nflrecievers *)v1, p2 = *(nflrecievers *)v2;
return strcmp(p1.team,p2.team);
}
qsort(data,c,sizeof(data),compare);
Basically I want an exact copy of the code that appears in the console window to also be outputted to a txt file..
#include <conio.h>
#include <iostream>
#include <dos.h>
#include <stdlib.h>
#include <windows.h>
#include <stdio.h>
#include <fstream>
using namespace std;
//Initialising gotoxy Comand
void gotoxy(int col, int row)
{
COORD coord;
coord.X = col;
coord.Y = row;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
int main()
{
char name1[20], name2[20], name3[30], name4[20];
int funcNum = 0;
int n1Nv, n1Mv, n1SEv, n1SWv;
int n2Nv, n2Mv, n2SEv, n2SWv;
int n3Nv, n3Mv, n3SEv, n3SWv;
int n4Nv, n4Mv, n4SEv, n4SWv;
int n1Total, n2Total, n3Total, n4Total, perTotal;
double n1Per, n1PerTotal;
double n2Per, n2PerTotal;
double n3Per, n3PerTotal;
double n4Per, n4PerTotal;
double maxVote;
//Introduction
cout << "================================================================================";
cout << " Ballot Results" << endl;
cout << " Version 2.1" << endl;
cout << " Created by Team b0nkaz" << endl;
cout << "================================================================================" << endl;
//Candidate Identification
cout << "Enter the candidates running for president" << endl << endl;
//cin.getline (workaround,30); //**
cout << "Candidate One: ";
cin.getline (name1,20);
cout << "Candidate Two: ";
cin.getline (name2,20);
cout << "Candidate Three: ";
cin.getline (name3,20);
cout << "Candidate Four: ";
cin.getline (name4,20);
cout << " " << endl;
//Separator
cout << "--------------------------------------------------------------------------------" << endl;
cout << "Input vote numbers from each region pressing enter after each input:" << endl << endl;
//Separator
cout << "--------------------------------------------------------------------------------" << endl;
//Input Table
//Regions
gotoxy(22,19);
cout << "North" << endl;
gotoxy(31,19);
cout << "Midlands" << endl;
gotoxy(43,19);
cout << "South East" << endl;
gotoxy(57,19);
cout << "South West" << endl;
gotoxy(69,19);
cout << "| Total" << endl;
cout << "_____________________________________________________________________|__________" << endl;
gotoxy(69,21);
cout << "|";
gotoxy(69,22);
cout << "|";
gotoxy(69,23);
cout << "|";
gotoxy(69,24);
cout << "|";
gotoxy(69,25);
cout << "|";
gotoxy(69,25);
cout << "|";
gotoxy(69,26);
cout << "|";
gotoxy(69,27);
cout << "|";
gotoxy(69,28);
cout << "|";
gotoxy(69,29);
cout << "|";
//Candidates
gotoxy(0,22);
cout << name1;
gotoxy(0,24);
cout << name2;
gotoxy(0,26);
cout << name3;
gotoxy(0,28);
cout << name4;
//Equals
cout << endl;
cout << "_____________________________________________________________________|__________" << endl;
//Vote Input
//North
gotoxy(22,22);
cin >> n1Nv;
gotoxy(22,24);
cin >> n2Nv;
gotoxy(22,26);
cin >> n3Nv;
gotoxy(22,28);
cin >> n4Nv;
//Midlands
gotoxy(31,22);
cin >> n1Mv;
gotoxy(31,24);
cin >> n2Mv;
gotoxy(31,26);
cin >> n3Mv;
gotoxy(31,28);
cin >> n4Mv;
//South East
gotoxy(43,22);
cin >> n1SEv;
gotoxy(43,24);
cin >> n2SEv;
gotoxy(43,26);
cin >> n3SEv;
gotoxy(43,28);
cin >> n4SEv;
//South West
gotoxy(57,22);
cin >> n1SWv;
gotoxy(57,24);
cin >> n2SWv;
gotoxy(57,26);
cin >> n3SWv;
gotoxy(57,28);
cin >> n4SWv;
//Total Votes
//Name1
gotoxy(72,22);
n1Total = n1Nv + n1Mv + n1SEv + n1SWv;
cout << n1Total;
//Name2
gotoxy(72,24);
n2Total = n2Nv + n2Mv + n2SEv + n2SWv;
cout << n2Total;
//Name3
gotoxy(72,26);
n3Total = n3Nv + n3Mv + n3SEv + n3SWv;
cout << n3Total;
//Name4
gotoxy(72,28);
n4Total = n4Nv + n4Mv + n4SEv + n4SWv;
cout << n4Total << endl << endl << endl;
//Percentage Calculation
perTotal = n1Total + n2Total + n3Total + n4Total;
//Candidate One
n1Per = n1Total*100;
n1PerTotal = n1Per/perTotal;
//Candidate Two
n2Per = n2Total*100;
n2PerTotal = n2Per/perTotal;
//Candidate Three
n3Per = n3Total*100;
n3PerTotal = n3Per/perTotal;
//Candidate Four
n4Per = n4Total*100;
n4PerTotal = n4Per/perTotal;
cout << "Please wait for calculation..." << endl << endl;
//Spinning Loading Line
//std::cout << '-' << std::flush;
//for(;;)
//{
//Sleep(100);
//std::cout << "\b\\" << std::flush;
//Sleep(100);
//std::cout << "\b|" << std::flush;
//Sleep(100);
//std::cout << "\b/" << std::flush;
//Sleep(100);
//std::cout << "\b-" << std::flush;
//}
//Sleeping Program
Sleep(1500); //1.5 secs
//Total Output
cout << "Candidate percentage:" << endl << endl;
//Converting To One Decimal Place
cout << fixed;
std::cout.precision(1);
//Vote Percentages
cout << name1 << " = " << n1PerTotal << "%" << endl;
cout << name2 << " = " << n2PerTotal << "%" << endl;
cout << name3 << " = " << n3PerTotal << "%" << endl;
cout << name4 << " = " << n4PerTotal << "%" << endl << endl;;
//Calculating Winnner
maxVote=n1PerTotal;
if (n2PerTotal>maxVote)
maxVote=n2PerTotal;
if (n3PerTotal>maxVote)
maxVote=n3PerTotal;
if (n4PerTotal>maxVote)
maxVote=n4PerTotal;
//Separator
cout << "--------------------------------------------------------------------------------" << endl;
//Sleeping Program
Sleep(1500); //1.5 secs
if(maxVote==n1PerTotal)
{
cout << " ***********************************************************************" << endl;
cout << " " << name1 << " " << endl;
cout << " is the new president of The British Society of IT Professionals " << endl;
cout << " with " << n1PerTotal << "% of the vote " << endl;
cout << " ***********************************************************************" << endl << endl;
//Separator
cout << "--------------------------------------------------------------------------------" << endl;
}
else if(maxVote==n2PerTotal)
{
cout << " ***********************************************************************" << endl;
cout << " " << name2 << " " << endl;
cout << " is the new president of The British Society of IT Professionals " << endl;
cout << " with " << n2PerTotal << "% of the vote " << endl;
cout << " ***********************************************************************" << endl << endl;
//Separator
cout << "--------------------------------------------------------------------------------" << endl;
}
else if(maxVote==n3PerTotal)
{
cout << " ***********************************************************************" << endl;
cout << " " << name3 << " " << endl;
cout << " is the new president of The British Society of IT Professionals " << endl;
cout << " with " << n3PerTotal << "% of the vote " << endl;
cout << " ***********************************************************************" << endl << endl;
//Separator
cout << "--------------------------------------------------------------------------------" << endl;
}
else if(maxVote==n4PerTotal)
{
cout << " ***********************************************************************" << endl;
cout << " " << name4 << " " << endl;
cout << " is the new president of The British Society of IT Professionals " << endl;
cout << " with " << n4PerTotal << "% of the vote " << endl;
cout << " ***********************************************************************" << endl << endl;;
//Separator
cout << "--------------------------------------------------------------------------------" << endl;
}
cout << "Press any key to exit..." << endl;
getch();
//system("pause");
}
I am using MS Visual Studio 2010 and any help would be great! Please note I am still very new to C++.
EDIT I would like to be able to see the output in CMD as well as have a separate txt file with the same output code. Everything that is displayed in the CMD window also copied into the txt file.
use an ofstream operator as such.
For some reason I can't seem to find the comment button or I would be involved in the discussion above... but I've edited my code below to reflect what seem to be some concerns of yours.
#include<fstream>
using namespace std;
int main()
{
ofstream fout;
fout.open("data.txt"); //Will create a new file if one is not already in existence
//You can put a static filename here or have them enter a string
//If you use a custom string your input will be "fout.open(STRING.c_str());
fout<<"Used exactly like cout from this point on";
fout.close(); //When you are done using it to close the file
}
I chose to name my ofstream operator fout because (while this is not always good to do) this way you can quickly change all of your cout's to fout's, or replicate them.
If the user enters a value and you want to spit it back out as well, you can use the ofstream operator after every cin.
You can find more information about ofstream here...
Hope this helped!
You can do this from outside of the application using tee. tee takes the output of a program and splits it into two streams (e.g. one to stdout and one to a file). Unfortunately, Windows doesn't come with a tee command but there are many implementations available.
If you want this to happen from within your program you can do the equivalent of tee using a custom ofstream. This article explains how.
I want to input data from txt file.
the file contains 2-d array [5][5]
how can i print out the any value i want?
i don't want to print out the whole 5*5 data
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
double distance[5][5] ;
string line;
ifstream ratefile;
ratefile.open("a.txt");
ofstream file;
if (ratefile.is_open())
{
while (! ratefile.eof() )
{
getline (ratefile,line);
ratefile.getline(distance, 25, '*');
cout << "\nDistance [0][0]" << ": " << distance[0][0];
cout << "\nDistance [0][1]" << ": " << distance[0][1];
cout << "\nDistance [0][2]" << ": " << distance[0][2];
cout << "\nDistance [0][3]" << ": " << distance[0][3];
cout << "\nDistance [1][0]" << ": " << distance[1][0];
cout << "\nDistance [1][1]" << ": " << distance[1][1];
cout << "\nDistance [1][2]" << ": " << distance[1][2];
cout << "\nDistance [1][3]" << ": " << distance[1][3];
cout << endl;
cin.get();
return 0;
}
If you only want to output one value and the user should be able to choose a value, you can do something like this:
int x, y;
cin >> x;
cin >> y;
cout << "\nDistance [" << x << "][" << y << "]" << ": " << distance[x][y];
But you should check if the user enter valid numbers (0 <= x < 4 and 0 <= y < 4)
There is part of the code missing, but you are printing values you want. Simply remove the lines you don't want to print.
Of course you can also use variables:
int x = 2,y = 2;
cout << endl << "Distance [" << x << "][" << y << "] : " << distance[x][y];