急急急！！！求懂的哥哥姐姐帮我耐心解释一下Q.Q

Question

#include<stdio.h> #include<signal.h> #include<stdlib.h> #include<sysKpes.h> #include<sys/wait.h> int main() { pid_t pid; int ret; /*创建子进程 */ if((pid=fork())<0) /*出错处理*/ { printf("Fork error\n"); exit(1); } if(pid==0) { printf("I am child progress(pid:%d).I am waiting for any signal\n",getpid()); raise(SIGSTOP); printf("I am child progress(pid:%d).I am killed by progress:%d\n",getpid(),getppid()); exit(0); } else { sleep(2); if((waitpid(pid,NULL,WNOHANG))==0) { if((ret=kill(pid,SIGKILL))==0) { printf("I am parent progress(pid:%d).I kill %d\n",getpid(),pid); } } waitpid(pid,NULL,0); exit(0); } } 麻烦帮我详细解释一下各行代码是啥意思。。。。还有函数啊，变量啊，为啥这样用等等，验收linux课程设计，老师可能问的都给我解释一下可以么Q.Q小女子不胜感激！

Answer 1

看到这混乱的代码，我一秒都不想看