添加以前的作业

2026-05-15 21:25:01 +08:00
parent fa2f3e2413
commit 56a4233098
10 changed files with 1558 additions and 0 deletions
--- a/exp0.5/task51.c
+++ b/exp0.5/task51.c
@@ -0,0 +1,54 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+
+int main(){
+    __pid_t pid;
+
+    //父进程输出
+    
+    printf("P1:I am father process,PID=%d,PPID=%d\n", getpid(), getppid());
+
+    //生成子进程
+    pid = fork();
+
+    //父进程
+    if(pid != 0){
+        //pid判断归零
+        pid = 0;
+        pid = fork();
+        
+        //子进程
+        if (pid == 0){
+            printf("P12:I am young brother process,PID=%d,PPID=%d\n", getpid(), getppid());
+            
+            //此时pid为0，继续生成子进程
+            pid = fork();
+            if (pid == 0){
+                printf("P121:我的学号是2024414290124,PID=%d,PPID=%d\n", getpid(), getppid());
+            }
+            //父进程
+            else{
+                //pid判断归零
+                pid = 0;
+                pid = fork();
+                //子进程
+                if (pid == 0){
+                    printf("P122:我的姓名是吕锦中,PID=%d,PPID=%d\n", getpid(), getppid());
+                }
+                //父进程
+                else{
+                }
+            }
+        }
+        //父进程
+        else{
+        }    
+    }
+    //子进程
+    else{
+        time_t t = time(NULL);
+        printf("P11:当前时间是：%s,PID=%d,PPID=%d\n", ctime(&t), getpid(), getppid());
+    }
+}