myforkex.c

#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>

int main (void) {

	printf("1\n");

	pid_t A = fork();

	printf("fork():%d\n",A);
	printf("pid:%d\n",getpid());

	if(A==0)
		printf("a\n");
	else
		printf("b\n");

	return 0;
}