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#include<stdio.h>
#include <sys/types.h>
#include<unistd.h>
int main()
{pid_t pid;int data = 10;while(1){printf("please input a data:");scanf("%d",&data);if (data == 1){pid = fork();if (pid>0){}else if (pid == 0){while(1){printf("\ndo net request,pid=%d\n",getpid());sleep(3);}}}else{printf("wati,do nothing\n");}}
}