This is my first program on C++. I successfully build it. When I run it, Windows keep giving me program is stop working, the same result that I try to run it with eclipse.
Here is my code:
#include <iostream>
#include <cmath>
#include <stdlib.h>
#include <vector>
using namespace std;
int main(){
string input;
vector<double> value;
int count = 0;
while(input != "#") {
cout << "Enter value " << count + 1 << "\n";
cin >> input;
cout << input;
if (input != "#") {
value[count] = atof(input.c_str());
}
count++;
}
cout << count;
double sum = 0;
for (int i = 0; i < count; i++) {
sum += value[i];
}
double ave = sum/count;
double dev = 0;
for (int i = 0; i < count; i++) {
dev += pow((value[i] - ave), 2);
}
dev = sqrt(dev / (count - 1));
cout << "\nThe average is " << ave << "\n";
cout << "The standard deviation is" << dev << "\n";
return 0;
}
Anyone has any idea? Thank you.
value[count] = atof(input.c_str());
is a problem since value does not have enough space in it. Use
value.push_back(atof(input.c_str()));
instead.
You also have a logic error in the while loop. count will be incremented even when the input is "#". I recommend changing it to:
while(true) {
cout << "Enter value " << count + 1 << "\n";
cin >> input;
cout << input;
if (input == "#") {
break;
}
value.push_back(atof(input.c_str()));
}
count = value.size();
I tried the code on other's computer. It works great. I think something goes wrong for my compiler.
Related
I am messing around with dynamic arrays for a user defined amount of inputs for an and gate.
The issue I am running into is that I don't know how many inputs the user is going to test and I need to be able to have an if-else statement that tests each input.
#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
class logic_gate {
public:
int x = 0;
};
int main() {
int userInput = 0;
cout << "How many inputs do you want on your and gate?: ";
cin >> userInput;
cout << endl;
logic_gate *and_gate = new logic_gate[userInput];
cout << endl << "Please enter the values of each bit below . . ." << endl <<
endl;
int userTest1 = 0;
for (int i = 0; i < userInput; i++) {
cout << "#" << i + 1 << ": ";
cin >> userTest1;
and_gate[i].x = userTest1;
}
return 0;
}
Here is the code that I am currently trying to find a solution for.
To implement an AND gate with n inputs you can simply do:
int output = 1;
for (int i = 0; i < n; ++i)
{
if (!and_gate [i])
{
output = 0;
break;
}
}
// ...
Use Vector data structure, you don't need to tell its size while declaring, unlike array, and it can grow automatically.
To read input till it's arriving, put cin inside while loop condition. I used getline to read whole line and work with it, so that whenever user presses enter button at empty line, program will think that no more input is coming anymore, and will start calculating 'And' of inputs.
//don't forget to import vector
#include <iostream>
#include <vector>
#include <string>
using namespace std;
class logic_gate {
public:
int x = 0;
logic_gate(){ //default constructor
}
logic_gate(int k){ //another constructor needed
x = k;
}
};
int main(){
cout << endl << "Please enter the values of each bit below . . ." << endl;
vector<logic_gate> and_gate; //no need to tell size while declaration
string b;
while(getline(cin, b)){ //read whole line from standard input
if (b == "\0") //input is NULL
break;
and_gate.push_back(logic_gate(stoi(b))); //to convert string to integer
}
if (!and_gate.empty()){
int output = and_gate[0].x;
for (int i = 1; i < and_gate.size(); i++){
output = output & and_gate[i].x;
}
cout << "And of inputs is: " << output << endl;
}
else{
cout << "No input was given!\n";
}
return 0;
}
Feel free to ask if some doubts linger
I figured out what I wanted to do. Thanks to everyone who helped and especially Paul Sanders. Below is my final code.
#include <iostream>
using namespace std;
class logic_gate {
public:
int x = 0;
};
int main() {
int userInput;
int output = 1;
cout << "How many inputs do you want on your and gate?: ";
cin >> userInput;
cout << endl;
logic_gate *and_gate = new logic_gate[userInput];
cout << endl << "Please enter the values of each bit below . . ." << endl <<
endl;
int userTest1;
for (int i = 0; i < userInput; i++) {
cout << "#" << i + 1 << ": ";
cin >> userTest1;
and_gate[i].x = userTest1;
}
if (userInput == 1) {
output = userTest1;
cout << "The test of " << userTest1 << " is " << output << endl << endl;
}
else if (userInput > 1) {
for (int i = 0; i < userInput; i++) {
if (!and_gate[i].x)
{
output = 0;
break;
}
}
cout << "The test of ";
for (int i = 0; i < userInput; i++) {
cout << and_gate[i].x;
}
cout << " is " << output << endl << endl;
}
return 0;
}
I want to write a program that only takes odd numbers, and if you input 0 it will output the addition and average, without taking any even number values to the average and the addition. I'm stuck with not letting it take the even values..
Heres my code so far:
int num = 0;
int addition = 0;
int numberOfInputs = 0;
cout << "Enter your numbers (only odd numbers), the program will continue asking for numbers until you input 0.." << endl;
for (; ;) {
cin >> num;
numberOfInputs++;
addition = addition + num;
if (num % 2 != 0) {
//my issue is with this part
cout << "ignored" << endl;
}
if (num == 0) {
cout << "Addition: " << addition << endl;
cout << "Average: " << addition / numberOfInputs << endl;
}
}
Solution of your code:
Your code doesn't working because of following reasons:
Issue 1: You adding inputs number without checking whether it's even or not
Issue 2: If would like skip even then your condition should be as follow inside of the loop:
if (num%2==0) {
cout << "ignored:" <<num << endl;
continue;
}
Solving your issues, I have update your program as following :
#include <iostream>
#include <string>
using namespace std;
int main()
{
int num = 0;
int addition = 0;
int numberOfInputs = 0;
cout << "Enter your numbers (only odd numbers), the program will continue asking for numbers until you input 0.." << endl;
for (; ;) {
cin>> num;
if (num%2==0) {
cout << "ignored:" <<num << endl;
continue;
}
numberOfInputs++;
addition = addition + num;
if (num == 0) {
cout << "Addition: " << addition << endl;
cout << "Average: " << addition / numberOfInputs << endl;
break;
}
}
}
#include <iostream>
#include <stdio.h>
using namespace std;
int main() {
int number;
int sum=0;
int average=0;
int inputArray[20]; // will take only 20 inputs at a time
int i,index = 0;
int size;
do{
cout<<"Enter number\n";
cin>>number;
if(number==0){
for(i=0;i<index;i++){
sum = sum + inputArray[i];
}
cout << sum;
average = sum / index;
cout << average;
} else if(number % 2 != 0){
inputArray[index++] = number;
} else
cout<<"skip";
}
while(number!=0);
return 0;
}
You can run and check this code here https://www.codechef.com/ide
by providing custom input
I've made a simple program which is supposed to ask the user for the length of a set, fill it with numbers and find the minimal value of that set. When I run the code, program works fine until the last number of the set is entered. Console prompt keeps blinking but it doesn't react to the keyboard. The program stops at this point. I don't understand why it doesn't just stop asking for input. I'm using CodeBlocks 16.01 if that matters. Here is is the source code:
#include <iostream>
using namespace std;
int main()
{
int len;
cout << "How many elements?" << endl;
cin >> len;
int myset[len];
int temp;
cout << "Enter " << len <<" numbers: " << endl;
for (int x = 0; x < len; x++)
{
cin >> temp;
myset[x] = temp;
cout << endl;
}
int mini;
for (int i = 0; i < len; i++)
{
if (i = 0)
{
mini = myset[i];
}
else if(myset[i] < mini)
{
mini = myset[i];
}
}
cout << "Minimal value of this set: " << mini << endl;
}
You set i to 0 in the if(i = 0) line... I suppose you want to write "if (i==0)"
I'm trying to build a project which only contains one .cpp file. I'm pretty sure that there is no other files within the folder, but eclipse keep giving me:
multiple definition of `main'
Here is my code:
#include <iostream>
#include <cmath>
#include <stdlib.h>
#include <vector>
using namespace std;
int main(){
string input;
vector<double> value;
int count = 0;
while(input != "#") {
cout << "Enter value " << count + 1 << "\n";
cin >> input;
if (input != "#") {
value[count] = atof(input.c_str());
}
count++;
}
cout << count;
double sum = 0;
for (int i = 0; i < count; i++) {
sum += value[i];
}
double ave = sum/count;
double dev = 0;
for (int i = 0; i < count; i++) {
dev += pow((value[i] - ave), 2);
}
dev = sqrt(dev / (count - 1));
cout << "\nThe average is " << ave << "\n";
cout << "The standard deviation is" << dev << "\n";
return 0;
}
Any help would be appreciated.
The comments are saying that your code is fine (I haven't tested it myself, though) so look around at your project directory, and see if there are any source files that shouldn't be there. If push comes to shove you can just copy/paste your code into a new project.
Ok I have been struggling with this code and I think I have it written out right but here is the rules from my teacher
1 = implies right Number, Right Place.
2 = implies right Number, Wrong Place.
0 = implies Wrong Number.
So the computer decides on 12345; the user guesses 11235; the computer should respond with 10221. Hint: Watch out for a double number like 11 when there is only one.
I have it where it does all of that except I can not get it to show a 0 when it is wrong can you please help me every single part is written except that part here is my code
// Programming 2
// Mastermind
#include "stdafx.h"
#include <iostream>
#include <ctime>
#include <cstdlib>
#include <string>
using namespace std;
struct fields{//the list of variables used in my program
int size = 5;;
int range = 9;
char lowest = '0';
string guess;
string answer;
int number;
int correct;
int position;
bool gameover = false;
};
void gameplay(fields & info);//declaring the function
int main()
{
fields game;
gameplay(game);//calling the function
system("pause");
return 0;
}
void gameplay(fields & info){//calling the structure into the function
srand(time(0));//to randomize number
info.answer = "";//getting the number
for (int i = 0; i < info.size; i++)
{
char ch = info.lowest + rand() % info.range;
info.answer += ch;
}
info.number = 1;
info.correct = 0;
info.position = 0;
while (!info.gameover)//using a while loop to let them go until they guess it
{
cout << "Guess #" << info.number << ": Enter 5 numbers that are '0' through '9': ";//asking them to guess
cout << info.answer;
cout << "\n";
cin >> info.guess;
if (info.guess == info.answer)//if the guess is right this will end the game
{
cout << "Right! It took you " << info.number << " move";
if (info.number != 1) cout << "s";
cout << "." << endl;
info.gameover = true;
}
int correctNumbers = 0;
for (char const &ch : info.guess) //seeing if there are numebrs in the guess that is in the answer
{
if (info.answer.find(ch) != string::npos)
{
++correctNumbers;
}
}
int const digits = 5;
int correctPositions = 0;
int correctPosition[digits];
int test = 0;
for (int i = 0; i < digits; ++i)//telling which numbers is correct and displaying the 2 or 0 for number is correct or number is wrong
{
if (info.answer[i] == info.guess[i])
{
++correctPositions;
}
if (info.answer[i] == info.guess[i]){
correctPosition[i] = 2;
cout << correctPosition[i];
}
if (correctPosition[i] != 2){
correctPosition[i] = 1;
cout << correctPosition[i];
}
if (correctPosition[i] != 2 && correctPosition[i] != 1)){
correctPosition[i] = 0;
cout << correctPosition[i];
}
}
cout << "\nYou have " << correctPositions << " numbers in the correct position " <<endl;
cout << "You have " << correctNumbers <<" correct numbers in the wrong position"<< endl;
}
cout << "GAME OVER\n\n";
}