updates to articles

OS/C/Week5/q2opt.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int compare_strings(const void *a, const void *b) {
+    return strcmp(*(const char **)a, *(const char **)b);
+}
+
+int main(int argc, char *argv[]) {
+    pid_t pid = fork();
+    if (pid == 0) {
+        qsort(&argv[1], argc - 1, sizeof(char *), compare_strings);
+        printf("Child Sorted:\n");
+        for (int i = 1; i < argc; ++i)
+            printf("%s\n", argv[i]);
+        exit(EXIT_SUCCESS);
+    } else {
+        wait(NULL);
+        printf("\nParent Unsorted:\n");
+        for (int i = 1; i < argc; ++i)
+            printf("%s\n", argv[i]);
+    }
+    return 0;
+}