fork创建进程

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

int main(){
        pid_t pid;
        printf("process Createion Study\n");
        pid= fork();
        switch(pid){
                case 0:
					printf("child processs is running ,curpid is%d,prarent is %d\,getpid:%d\n",pid,getppid(),getpid());
					break;
                case -1:
					perror("process create failed\n");
					break;
                default:
					printf("Parent processs is running ,Child is%d,prarent is %d,getpid:%d\n",pid,getppid(),getpid());
					break;
        }
        return 0;
}