Initial commit from https://devstar.cn/lat5211/base.git ( ed411359a0b35dccda674d15913e38a24a6d006b )

src/execlp.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h> 
+
+int main(int argc, char *argv[])
+{
+    (void)argc;  // 明确标记未使用
+    (void)argv;  // 消除编译器警告
+    
+    pid_t pid = fork(); // 使用pid_t类型更规范
+    
+    if (pid < 0) { 
+        /* 错误处理 */
+        perror("Fork Failed"); 
+        exit(EXIT_FAILURE);    // 使用标准失败码
+    } 
+    else if (pid == 0) {
+        /* 子进程 */
+        execlp("/bin/ls", "ls", (char *)NULL); // 确保NULL转换为(char *)
+        
+        // 如果exec失败才会执行到这里
+        perror("Exec Failed");
+        exit(EXIT_FAILURE);
+    } 
+    else {     
+        /* 父进程 */
+        int status;
+        wait(&status);  // 获取子进程退出状态
+        
+        if (WIFEXITED(status)) {
+            printf("Child Completed with status: %d\n", WEXITSTATUS(status));
+        } else {
+            printf("Child terminated abnormally\n");
+        }
+        
+        exit(EXIT_SUCCESS); // 使用标准成功码
+    }
+}

src/fork.c

@@ -0,0 +1,15 @@
+#include  <unistd.h>
+#include  <stdio.h>
+#include  <sys/types.h>
+
+int main  () 
+{
+	pid_t  pid;
+	pid=fork();
+	if  (pid  <  0) 
+		printf("error  in  fork!");
+	else  if  (pid  ==  0)
+		printf("i  am  the  child  process,  my  process  id  is  %d\n",getpid());
+	else
+		printf("i  am  the  parent  process,  my  process  id  is  %d\n",getpid()); 
+}

src/getSum.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int getSum(void)
+{
+    int sum = 0;
+    for (int i = 1; i <= 100; ++i) {
+        sum += i;
+    }
+    return sum;
+}
+
+int main(void)
+{           
+    printf("%d\n", getSum());
+    return 0;
+}