fork() sample

fork-sample.c

#include <sys/types.h>
#include <stdio.h>
 
int a = 6;  
 
int main( void )
{
    int b;
    pid_t pid;
 
    b = 88;
    printf( "before fork : a = %d, b=%d\n", a, b );
 
    pid = fork();
    printf( "after fork\n" );
    if( pid == 0 ) { /* child */
        printf( "I'm clild : a = %d, b=%d\n", ++a, ++b );
 
    } else { /* parent */
        printf( "I'm parent : a = %d, b=%d\n", a, b );
        wait( pid );
    }
    exit( 0 );
}