#include<stdio.h> #include<unistd.h> #include<sys/types.h> #include<sys/wait.h> int main () { pid_t pid,wpid; int status,i; pid=fork(); if(pid==0) { printf(“这是子进程,进程号(pid)是:%d\n”,getpid()); 睡眠(5); /子进程等待5秒钟/ exit(6); } else { printf(“这是父进程,正在等待子进程......\n”); wpid=wait(&status); /父进程调用wait函数,消除僵尸进程/ i=WEXITSTATUS(status); printf(“等待的进程的进程号(pid)是:%d ,结束状态:%d\n“,wpid,i);} }调试以上程序,以上代码有错误吗
时间: 2024-03-25 20:37:52 浏览: 106
这段代码中有一个中文字符 `(` 和一个中文字符 `)`,分别在 `main` 函数的声明和 `printf` 函数的调用中出现,应该将它们改为英文字符 `(` 和 `)`。
修改后的代码如下:
```c
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
int main() {
pid_t pid, wpid;
int status, i;
pid = fork();
if (pid == 0) {
printf("这是子进程,进程号(pid)是:%d\n", getpid());
sleep(5); /*子进程等待5秒钟*/
exit(6);
} else {
printf("这是父进程,正在等待子进程......\n");
wpid = wait(&status); /*父进程调用wait函数,消除僵尸进程*/
i = WEXITSTATUS(status);
printf("等待的进程的进程号(pid)是:%d,结束状态:%d\n", wpid, i);
}
return 0;
}
```
除此之外,这段代码没有其他错误。
相关问题
#include<stdio.h> #include<unistd.h> #include<sys/types.h> #include<sys/wait.h> int main () { pid_t pid,wpid; int status,i; pid=fork(); if(pid==0) { printf("这是子进程,进程号(pid)是:%d\n",getpid()); sleep(5); /子进程等待5秒钟/ exit(6); } else { printf("这是父进程,正在等待子进程……\n"); wpid=wait(&status); /父进程调用wait函数,消除僵尸进程/ i=WEXITSTATUS(status); printf("等待的进程的进程号(pid)是:%d ,结束状态:%d\n",wpid,i); } } 将以上代码的中文改为同等意思的英文
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
int main() {
pid_t pid, wpid;
int status, i;
pid = fork();
if (pid == 0) {
printf("This is the child process with process ID (pid): %d\n", getpid());
sleep(5); // Child process waits for 5 seconds
exit(6);
} else {
printf("This is the parent process, waiting for the child process...\n");
wpid = wait(&status); // Parent process calls wait function to eliminate zombie processes
i = WEXITSTATUS(status);
printf("The process ID (pid) of the waited process is: %d, exit status is: %d\n", wpid, i);
}
}
#include <stdlib.h> #include<stdio.h> #include<unistd.h> #include<sys/types.h> #include<sys/wait.h> int main () { pid_t pid,wpid; int status,i; pid=fork(); if(pid==0) { printf("This is the child process, process number(pid)is:%d\n",getpid()); sleep(5); exit(6); } else { printf("This is the parent process, waiting for the child process鈥︹€n"); wpid=wait(&status); i=WEXITSTATUS(status); printf("Process ID of the waiting process(pid)is:%d ,end_state:%d\n",wpid,i); } } 改写程序,在子程序中用函数system启动一个较长时间运行的任务,而在父进程中执行完成任务后,应用waitpid函数等待子进程,子进程退出后父进程才退出。
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
int main()
{
pid_t pid, wpid;
int status, i;
pid = fork();
if (pid == 0) {
printf("This is the child process, process number(pid) is:%d\n", getpid());
system("sleep 10"); // 在子进程中执行一个较长时间的任务
exit(6);
} else {
printf("This is the parent process, waiting for the child process to finish...\n");
do {
wpid = waitpid(pid, &status, WUNTRACED); // 等待子进程退出
} while (!WIFEXITED(status) && !WIFSIGNALED(status)); // 如果子进程没有正常退出或被信号中断,则继续等待
i = WEXITSTATUS(status);
printf("Process ID of the waiting process(pid) is:%d, end_state:%d\n", wpid, i);
}
return 0;
}
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