How to read until ESC button is pressed from cin in C++

Question

I\'m coding a program that reads data directly from user input and was wondering how could I read all data until ESC button on keyboard is pressed. I found only something li

Answer 1

int main() {
  string str = "";
  char ch;
  while ((ch = std::cin.get()) != 27) {
    str += ch;
  }

 cout << str;

return 0;
}

this takes the input into your string till it encounters Escape character

Answer 2

After you read the line, go though all characters you just read and look for the escape ASCII value (decimal 27).

---

Here's what I mean:

while (std::getline(std::cin, line) && moveOn)
{
    std::cout << line << "\n";

    // Do whatever processing you need

    // Check for ESC
    bool got_esc = false;
    for (const auto c : line)
    {
        if (c == 27)
        {
            got_esc = true;
            break;
        }
    }

    if (got_esc)
        break;
}

Answer 3

I would suggest that for not just ESC character in C++, but for any other character of the keyboard in any language, read characters that you input into an integer variable and then print them as integer.

Either that or search online for a list of the ASCII characters.

This will give you ASCII value of the key, and then it's plain simple

if(foo==ASCIIval)
   break;

For the ESC character, the ASCII value is 27.

Answer 4

I found that this works for getting input for the escape key, you can also define and list other values in the while function.

#include "stdafx.h"
#include <iostream>
#include <conio.h> 

#define ESCAPE 27

int main()
{
    while (1)
    {
        int c = 0;

        switch ((c = _getch()))
        {
        case ESCAPE:
            //insert action you what
            break;
        }
    }
    return 0;
}

Answer 5

#include <iostream>
#include <conio.h>

using namespace std;

int main()
{
    int number;
    char ch;

    bool loop=false;
    while(loop==false)
    {  cin>>number;
       cout<<number;
       cout<<"press enter to continue, escape to end"<<endl;
       ch=getch();
       if(ch==27)
       loop=true;
    }
    cout<<"loop terminated"<<endl;
    return 0;
}