My question is if there was a way to get an integer variable and then print a specific word when it is set.
What I mean is if someone inputs a value of 1 that is then assigned to variable int fCur, is there a way to print a word (for example Germany) instead of the value 1 ?
cout << "You selected "<< fCur << endl;
I want it to print
"You selected Germany"
not
"You selected 1"
I appologize if this is poorly worded this is my first time using this site
If you want to have each country indexed as follows:
Germany
India
Korea
you can simply use this:
#include <iostream>
#include <string>
int main()
{
std::string countries[] = {"Germany", "India", "Korea"};
int country_number;
std::cin >> country_number; // invalid input is not being checked
// array indexing starts from 0
std::cout << "You selected " << countries[country_number - 1] << std::endl;
return 0;
}
I suggest using an enum to represent the options, and to use if statements that will set the string value:
int main()
{
enum Country {GERMANY = 1, SPAIN = 2, ITALY = 3};
cout << "Enter an option: ";
int fCur{};
cin >> fCur;
string str;
if (fCur == GERMANY)
str = "Germany";
else if (fCur == SPAIN)
str = "Spain";
else if (fCur == ITALY)
str = "Italy";
else
;// Handle error
cout << "You selected " << str << endl;
}
As I guess it you want to create a menu for selecting options something like -
Germany
US
Spain
China
etc
If it is only integer 1 that is assigned to Germany then an if condition is enough else to display based on the selection from a menu use switch
int n;
cin >> n;
switch(n) {
case 1: {
cout << "Germany" << endl;
break;
}
case 2: {
cout << "US" << endl;
break;
}
case 3: {
cout << "Spain" << endl;
break;
}
case 4: {
cout << "China" << endl;
break;
}
default: cout << "Select from valid set of options";
}
Hope this helps.
Related
I need help. I'm currently learning C++ programming and I'm still at the beginner level. I'm still figuring out how to make the while loop working. My idea is when inserting the correct code input, the switch statement choose the right case statement and loop back to insert another input until 0 inserted to stop the loop and calculate for the final output in main() constructor.
I know I have few kinks to fix soon but I'm still struggling to figure out this particular part.
#include <stdio.h>
#include <iostream>
#include <iomanip>
using namespace std;
double sst = 0.06, total = 0, grandTotal, price, discount, newPrice, totalSST;
int quantity, count, code;
string name, ech;
void item001(){
name = "Rice (5kg)";
price = 11.5;
discount = 0;
}
void item002(){
name = "Rice (10kg)";
price = 25.9;
discount = 0;
}
void item003(){
name = "Sugar (1kg)";
price = 2.95;
discount = 0;
}
void item_cal(){
cout << "Please enter the quantity of the item: ";
cin >> quantity;
newPrice = (price + (discount * price)) * quantity;
cout << "\nItem: " << name << " || Quantity: " << quantity << " || Price: RM" << newPrice << endl;
}
void input(){
cout << "Welcome SA Mart\n" << "Please insert the code. Press 0 to stop: ";
while (code != 0){
cin >> code;
switch (code){
case 001:
item001();
item_cal();
break;
case 002:
item002();
item_cal();
break;
case 003:
item003();
item_cal();
break;
default:
cout << "\nWrong code" << endl;;
break;
total += newPrice;
}
}
}
int main(){
input();
totalSST = total * sst;
grandTotal = total + totalSST;
cout << fixed << setprecision(2);
cout << "Total: RM" << total << " ||SST: RM" << totalSST << " || Grand Total: RM" << grandTotal << endl;
return 0;
}
The only functional issue I see in your code is that there is a chance that the code variable will initialize to 0 (depends on the compiler/randomness). If that happens, your input method will return before it enters the loop. Other than that it looks like it will work. Of course, programming is not just the art of "making it work," style and readability are important too. In general, you want to confine variables to the smallest scope in which they are referenced. 'code' should not be a global variable, it should live in the input method. As for the loop, there are several ways it could be implemented: a "while(true)" loop could be used, in which case the variable may be defined inside the loop; on the other hand a "do while" would guarantee one loop runs (perhaps that would be a good fit here), but the variable must live outside of the loop, at least int the scope of conditional check. The way you choose is often a matter of style. Below, I use a "while(true)."
In programming, readability matters (a lot). I think this program would be easier to read if the data were broken up into a few structs, perhaps "Bill," and "Food." Another thing to consider is how to broaden the usage of your program, without introducing significant complexity. For example, it could work for any grocery store (any set of food items/prices). This is often a matter of determining an appropriate set of parameters to feed your program.
To do these things you might write something like this:
#pragma once
#include <string>
#include <map>
using namespace std;
namespace market {
const double& sst = 0.06;
struct Bill {
double total = 0;
double totalSST = 0;
double grandTotal = 0;
};
struct Food {
const char* name;
double price;
double discount;
Food(const char* name, double price, double discount = 0)
: name(name), price(price), discount(discount) {}
double result_price() const {
return price - price * discount;
}
};
struct GroceryStore {
const char* name;
std::map<int, Food> inventory;
GroceryStore(const char* name, std::map<int, Food> inventory)
: name(name), inventory(inventory) { }
};
void shop(const GroceryStore& store, Bill& bill, bool show_menu = false, int exit_code = 0) {
// check error conditions
if (store.inventory.find(exit_code) != store.inventory.end()) {
// that's the 'exit_code' code silly!
cout << "Bad store. Come back another time." << endl;
return;
}
cout << "Welcome to " << store.name << endl;
if (show_menu) {
cout << "The following items are available for purchase:" << endl;
for (auto p : store.inventory) {
cout << "\t" << p.first << ") " << p.second.name << "(" << p.second.result_price() << endl;
}
}
cout << "Enter the product code of the item you wish to purchase:";
int code;
cin >> code;
while (true) {
auto food_it = store.inventory.find(code);
if (food_it == store.inventory.end()) {
cout << "Thanks for stopping by." << endl;;
break;
}
cout << "Please enter the quantity of the item: ";
uint32_t quantity;
cin >> quantity;
auto& food = food_it->second;
auto disc_price = food.price - (food.discount * food.price);
bill.total += disc_price * quantity;
cout << "\nItem: " << food.name << " || Quantity: " << quantity << " || Price: RM" << disc_price << endl;
cout << "Would you like anything else? Enter the product code, or press " << exit_code << " to proceed to check-out." << endl;
cin >> code;
}
}
void ring_up(Bill& bill) {
bill.totalSST = bill.total * sst;
bill.grandTotal = bill.total + bill.totalSST;
}
void run() {
int code = 1;
GroceryStore store("SMart", {
{ code++, Food("Rice (5kg)", 11.5, 0) },
{ code++, Food("Rice (10kg)", 25.9) },
{ code, Food("Sugar (1kg)", 2.95, 0) }
});
Bill bill;
shop(store, bill, true);
ring_up(bill);
cout << "Total: RM" << bill.total << " ||SST: RM" << bill.totalSST << " || Grand Total: RM" << bill.grandTotal << endl;
}
}
Firstly there is a bug in input when u will input 0 then also it won't break while loop as code that is checked contains the previous value.
for example:
input is
3
0
but according to your code when the code will run the second time and while condition is checked code still contains 3 as value and code will run one more time
Try initialising code to some value, for example, -1. I'm not really sure but I think for global int variables, they initialise int variables to 0. So your first loop doesn't run. Or another way to do it is using do while loops instead of while loop.
do {
cin >> code;
switch (code){
case 001:
item001();
item_cal();
break;
case 002:
item002();
item_cal();
break;
case 003:
item003();
item_cal();
break;
default:
cout << "\nWrong code" << endl;;
break;
total += newPrice;
} while (code != 0);
}
This makes sure that the loop will run at least once, making code initialised.
Hope it helps you! Have fun programming!
I am currently working on this program. The program outputs a country's total coarse grain production as a double value after the country's name is inputted. I am using a string array and a double array. The program runs and executes perfectly:
int main ()
{
string countries[18] = {"World", "Total foreign", "United States", "Canada", "Mexico"};
double grainsProduction[18] = {1361.4, 977.0, 384.4, 26.2, 33.2}
string countryChoice = " ";
int sub = 0;
cout << "Enter country name: ";
getline (cin, countryChoice);
while(sub < 5 && countries[sub] != countryChoice)
{
sub += 1;
}
if (sub < 5)
{
cout << "" << countries[sub] << "'s coarse grain production for 2017/2018 was: "
<< grainsProduction[sub] << " million metric tons." << endl;
}
else
{
cout << "Invalid country name." << endl;
}
}
However, I would like to include another country in the countries array. This country name, when inputted, should output the statement "Not reported."
I would like to add a dummy value into the doubles array that would force convert into the string message "Not reported" if the particular country is inputted. How can this be done?
maybe when you enter the country name you can use this code to check if there is a country with that name in the array and if there is not display your custom message.
Here is an code example:
for(int x = 0; x < size; x++){
if (countries[x].find(countryChoice, 0) != std::string::npos){
cout << data[x] << endl;
}
else {
cout << "No data for this Country" << endl;
}
I'm working on a C++ program for my class and I'm unsure about a specification. I want to add numbers before the output of string orderCode but am unsure how to do this. For example, output for the input "BF12" would be "12 Black Forest cakes." I am trying to include the number and amount of cakes into one single string variable. Could anyone offer me some pointers? Anything would be very much appreciated.
Here is my code:
#include <iostream>
using namespace std;
int main() {
string orderCode;
string repeat = "y";
while ("y" == repeat) {
cout << "\nWelcome to the Great Cake company!\n";
cout << "\nEnter the cake order code: ";
cin >> orderCode;
int quantity = orderCode.length() - 1;
if (orderCode == "BF2")
{ (cout << orderCode.substr(quantity) << " Black Forest cakes");
}
if (orderCode == "CC")
{ (cout << "Carrot cakes");
}
if (orderCode == "CM")
{ (cout << "Chocolate Mint cakes");
}
if (orderCode == "DF")
{ (cout << "Devil's Food cakes");
}
if (orderCode == "GC")
{ (cout << "German Chocolate cakes");
}
if (orderCode == "PC")
{ (cout << "Pumpkin Cheesecakes");
}
if (orderCode == "RC")
{ (cout << "Rum cakes");
}
if (orderCode == "T")
{ (cout << "Tiramisu cakes");
}
cout << "\nOrder more? (y/n) ";
cin >> repeat;
}
return 0;
}
You want to parse the user input, assuming the digit will always be after the letters and assuming the digit is a decimal (thus not counting ABCDEF as part of the digit).
string orderCode = "BF12";
size_t last_index = orderCode.find_last_not_of("0123456789");
string result = orderCode.substr(last_index + 1);
result += " Black Forest cakes";
cout << result << endl;
Meanwhile for your switch case you still need to erase the digit part of the input.
orderCode.erase(last_index+1);
You can then compare to orderCode
You need to omit BF and exctract the number. Since BF has length of 2, you need to print the rest:
cout << orderCode.substr(2, quantity) << " Black Forest cakes"
Meanwhile, your switch case does not make any sense.
I am new to c++ and and am working on a program that has is a simple dvd rental program. I am having issues with case 3 & 4 specifically. Maybe I am misunderstanding the purpose behind sizeof. What I am trying to have it do is tell if the char array is empty and if it is allow the user to check it out by putting their name in and if it is not available give them a response saying that it is not available. case 4 should do the opposite and allow them to check it in. Any suggestions would be greatly appreciated.
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <string>
#include <limits>
using namespace std;
const int arrSize = 5;
struct dvdStruct //distance struct
{
int id;
char title[51] = { 0 };
char rating[5] = { 0 };
double price;
char borrower[51] = { 0 };
} dvd;
dvdStruct dvds[arrSize] = {};
int userSelection; //intput variable for main menu selection
int borrowId (0);
int borrowIdReturn(0);
//void initalize();
int main() {
int size(0);
dvds[0].id = 1;
dvds[1].id = 2;
dvds[2].id = 3;
dvds[3].id = 4;
dvds[4].id = 5;
strcpy(dvds[0].title, "Fast 1");
strcpy(dvds[1].title, "Fast 2");
strcpy(dvds[2].title, "Fast 3");
strcpy(dvds[3].title, "Fast 4");
strcpy(dvds[4].title, "Fast 5");
strcpy(dvds[0].rating, "PG - 13");
strcpy(dvds[1].rating, "PG - 13");
strcpy(dvds[2].rating, "PG - 13");
strcpy(dvds[3].rating, "PG - 13");
strcpy(dvds[4].rating, "PG - 13");
dvds[0].price = '19.1';
dvds[1].price = '19.2';
dvds[2].price = '19.3';
dvds[3].price = '19.4';
dvds[4].price = '19.5';
strcpy(dvds[0].borrower, "");
cout << strlen(dvds[0].borrower) << endl;
strcpy(dvds[1].borrower, "\0");
strcpy(dvds[2].borrower, "\0");
strcpy(dvds[3].borrower, "\0");
strcpy(dvds[4].borrower, "\0");
do {
cout << "1.Display All DVD’s" << endl << "2.Display DVD Detail" << endl << "3.Check Out a DVD" << endl << "4.Check In a DVD" << endl << "5.Exit" << endl;
cin >> userSelection; //Input from the user.
switch (userSelection)
{
case 1:
for (int i = 0; i < arrSize; i++)
{
std::cout << dvds[i].title << "' " << dvds[i].rating << " " << dvds[i].borrower << endl;
}
system("pause");
system("CLS");
break;
case 2:
int dvdNum;
cout << "Enter a DVD number:";
cin >> dvdNum;
std::cout << dvds[dvdNum - 1].title << "' " << dvds[dvdNum - 1].rating << endl;
system("pause");
system("CLS");
break;
case 3:
cout << "Enter and id:";
cin >> borrowId;
if (strlen(dvds[borrowId-1].borrower) == 0)
{
cout << "Enter your name: ";
cin >> dvds[borrowId-1].borrower;
}
else
{
cout << "This dvd is not available" << endl;
}
system("pause");
system("CLS");
break;
case 4:
cout << "Enter and id:";
cin >> borrowIdReturn;
if (strlen(dvds[borrowIdReturn - 1].borrower) == 0)
{
cout << "This dvd is available" << endl;
}
else
{
cout << "Your DVD has been returned " << endl;
strcpy(dvds[borrowIdReturn - 1].borrower, "\0");
}
system("pause");
system("CLS");
break;
case 5:
return 0;
break;
}
} while (userSelection == 1 || userSelection == 2 || userSelection == 3 || userSelection == 4);
}
sizeof() gives you the size of an object. The size of the object is always the same, no matter what's in the object. In fact, sizeof() is calculated at compile time, and its value could not be affected, in any way, by whatever happens at runtime.
C++ code should use std::string, instead of char arrays, in most cases. std::string's empty() method indicates whether the string is empty.
If you still insist on working with C-style char arrays, and C-style '\0' terminated strings, use the C strlen() function to check if the character array contains nothing but a leading '\0', indicating an empty string.
I've been making a little memory game as an exercise from a textbook I'm doing. It's called Grandma's trunk and it works by in one turn you found an item in the trunk and the next turn you say you found the previous item and the newest item on this turn...I think.
Mostly it's an exercise on using functions, which I think I've gotten down pretty well. But my output is completely wrong. I've believe I've located the problem in one function where I'm supposed to analyze the first character and decided if it needs an AN or A or THE before the string. There might be a problem with the random function I'm using to throw in predefined items from a small database. The int main() function is supposed to be relatively complete, this is just an exercise to master functions...which I, sorta? Would rather call it novice experience.
I thought that perhaps I was running into the getline bug where it couts a blank line, and from my understanding, is fixed by cin.ignore(); but all that did was force me to press enter twice when I enter data. Which...I sort of like. Perhaps I'm using gizmos like isupper and .at() wrong? I tried using find_first_of but it didn't really change anything.
output calling the storage trunk and the owner grandma and just using word1 word2 word3... wordn....as items found leaves me with the output.
In grandma trunk you've found a
and an ord3 word1.
it completely muddles up the output. I'm starting to think that the int main() body I was given wasn't exactly stellar. But I can't be 100% confident in my article function. Any help would just be incredible. I've been struggling using this among many books and advice from a buddy to teach myself a little about programming. It's been a rather huge headache.
program itself
#include <iostream>
#include <string>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>
using namespace std;
string CorrectArticle(string phrase);
string GetPhrase(void);
bool Continue(void);
string UpperCase(string);
string RandomItem(void);
const string PUNCTUATION = ".";
int main(){
//Variables
int turn;
bool flag;
string phrase,
article,
story, item,
storage, owner;
srand(time(NULL));
cout << "Welcome to Grandmother's Trunk 9000" << endl;
cout << "This is a memory game. Each turn a player" << endl;
cout << "Says an item to place inside a trunk. " << endl;
cout << "And the next player has to say what the " << endl;
cout << "previous player said plus his/her own item." << endl;
cout << "This will go around in revolving turns." << endl;
cout << endl << endl;
cout << "But Grandma's Trunk is a little dry..." << endl;
cout << "Let's change what the storage is and " << endl;
cout << "Who owns it." << endl << endl;
//define storage variable
cout << "What exactly is this storage?" << endl;
getline (cin, storage);
cout << "So the items are stored in " << storage << endl;
cout << endl;
//define owner
cout << "Who owns this " << storage << " ?" << endl;
getline (cin, owner);
cout << "The owner is " << owner << endl;
story = "In "+ owner + " " + storage + " you've found ";
turn = 0;
flag = Continue();
//While flag is true
while (flag) {
if (turn %2 == 0) {
item = GetPhrase();
} else {
item = RandomItem();
}
//set corrected item to article
article = CorrectArticle(item);
//advance the story every item
story = story + "\n and " + article + " " + item;
cout << story << PUNCTUATION << endl;
turn++;
flag = Continue();
}
return (0);
}
//Gives A, AN, and THE to correct words
// An if phrase starts with i,e,i,o,u or y
// A if phrase starts with other lower case letters
// The for phrases that start with an uppercase letter
string CorrectArticle(string phrase){
int i=0;
string correctedString;
string stringAn;
string stringA;
string stringThe;
stringAn= " an ";
stringA = " a ";
stringThe= "The ";
if (GetPhrase().at(i) = "a" or "e" or "i" or "u"){
correctedString = stringAn + GetPhrase();
}else if (isupper(GetPhrase().at(i))){
correctedString = stringThe + GetPhrase();
}else{
correctedString = stringA + GetPhrase();
}
return correctedString;
}
//This function takes no parameters
//and returns the user's input
string GetPhrase(void){
string itemInput;
cout << "\nWhat did you find? \n" << endl;
getline (cin, itemInput);
cout << "\nYou found " << itemInput << endl;
cin.ignore();
return itemInput;
}
//Asks user if they wish to continue
bool Continue(void){
//return false if no, true if yes
string continueString;
cout << "Would you like to continue?";
cout << " Yes or No would suffice" << endl;
getline(cin,continueString);
UpperCase(continueString);
cout << "You picked " << continueString;
if (UpperCase(continueString).find("NO") != string::npos){
return false;
} else if (UpperCase(continueString).find("YES") != string::npos){
return true;
}
}
//Changes the string to uppercase
string UpperCase(string stringUpper){
int i = 0;
while (i<stringUpper.size()){
stringUpper[i] = toupper(stringUpper[i]);
i++;
}
return stringUpper;
}
//Randomizes items found in game
string RandomItem(void){
int randomNumber;
int maxNumberOfItems = 5;
string randomizedItem;
randomNumber= rand() % maxNumberOfItems;
switch (randomNumber){
case 0:
randomizedItem = "Smaug";
break;
case 1:
randomizedItem = "Batman";
break;
case 2:
randomizedItem = "Yoda";
break;
case 3:
randomizedItem = "Paul Atreides";
break;
case 4:
randomizedItem = "Captain Kirk";
break;
default:
cout << "ERRORRRR! PANIC!" << endl;
}
return randomizedItem;
}
Remember that = is assignment, == for compare.
Also remember that you have to compare variable with value, such as:
if ((string == "a") or (string == "e") ...
If the or works for you, all the best. I've only been able to use ||. Must be compiler conformity issues.
Try this:
bool is_vowel(char letter)
{
const std::string vowels("aeiouAEIOU");
return (vowels.find_first(letter) != std::string::npos);
}
In other words, I place all the vowels in a string a search the string. If there is a match, the letter is a vowel.