[wangml@iZwz976helaylvgqok97prZ testForC]$ ./exit.test

q

[wangml@iZwz976helaylvgqok97prZ testForC]$ ./exit.test

a

Here!

[wangml@iZwz976helaylvgqok97prZ testForC]$ cat exit.test.c

#include <stdio.h>

#include <stdlib.h>

void testExit(char ch);

int main(int argc, char **argv)

{

    char ch;

    scanf("%c", &ch);

    testExit(ch);

    printf("Here!\n");

    return ;

}

void testExit(char ch)

{

    if (ch == 'q')

    {

        exit();

    }

    return;

}