#include <stdio.h>
#include <stdlib.h>
 
void son_function(void);
 
int main(void) {
	int i;
	int pid;
 
	for (i = 0; i < 3; i++)
	{
	    pid = fork();
 
	    if (pid == 0)
	    {
	        son_function();
	    }
 
	    if (pid < 0)
	    {
	        exit(1);
	    }
	}	
	return 0;
}
 
void son_function(void)
{
    printf("my pid=%d\n", getpid());
    printf("%d: alpha\n", getpid());
    printf("%d: beta\n", getpid());
    printf("%d: charlie\n", getpid());
    exit(0);
}

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