How to Handle an Infinite Loop in C/C++ Code?

[Akshay_Anti]

Hello there!

I typed this code and saved it as a .c file

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>

int main()
{
    int a;
    while(1)
    {
            if (kbhit())
            {
                        system("cls");
                        printf("%d ",getche());
            }
    }
    return 0;
    getch();
}

This code displays ASCII value of any character entered... The problem is that it being an infinite loop does not exit itself on pressing escape key.. How to handle that exception?
And what is the equivalent of kbhit() in C++ and in which header?

Thanks in advance

 

[jedishrfu]

you have to read the keyboard buffer if kbhit() returns 1 then if that character is an escape character then you can break; out of the loop.

 

[Akshay_Anti]

i can check using if() condition, but how to check for escape character?

 

[jedishrfu]

http://www.theasciicode.com.ar/ascii-control-characters/escape-ascii-code-27.html

I think you need to use the getch() function to read the keyboard or getchar()

http://programming59.blogspot.com/2011/07/getch-function-in-cc-language.html

 

[Akshay_Anti]

ok.. got it.. thanx.. :)

 

[rcgldr]

Note that the getch() or any code after the return(0) will never get used.

Normally to terminate user input in DOS like console windows, an "end of file" character is used, such as ctrl-D (hex 04) on Unix / Linux systems, and ctrl-Z (hex 1A) on MSDOS / Windows (in Dos console window) systems. For Windows / GUI type programs, ctrl-Z is normally the "undo" key.