Linux练习（wait父进程等待子进程）

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

int main()
{
pid_t pid;
char *m;
int n;
pid=fork();
if(pid==0)
{
m="this is child";
n=5;
}
else
{
m="this is father";
n=3;
}

for(;n>0;n--)
{

puts(m);
sleep(1);
}
if(pid!=0)
{
pid_t child_pid;
child_pid=wait(NULL);

printf("child has finished: %d\n",child_pid);

}
exit(0);

}