fork wait

如果父进程先结束，子进程不会自己结束

#include<stdio.h>#include<stdlib.h>#include<sys/wait.h>int main(){        int a,b,c;        if(a = fork()){                printf("fork1---%ld\n",a);                int stat;                //等待子进程结束                pid_t child_pid = wait(&stat);                if(WIFEXITED(stat)){                        printf("exited with code %d\n",WEXITSTATUS(stat));                }        }else{                printf("I'm child\n");        }        //int stat;        //pid_t child_pid = wait(&stat);        //if(WIFEXITED(stat)){        //      printf("exited with code %d\n",WEXITSTATUS(stat));        //}        return 0;}