GMS Linux: start?

userprog/echo/echo.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <string.h>
+
+int main(int argc, char *argv[]) {
+    int start_index = 1;
+    int no_newline = 0;
+
+    if (argc > 1 && strcmp(argv[1], "-n") == 0) {
+        no_newline = 1;
+        start_index = 2;
+    }
+
+    for (int i = start_index; i < argc; i++) {
+        printf("%s", argv[i]);
+        if (i < argc - 1) {
+            printf(" ");
+        }
+    }
+
+    if (!no_newline) {
+        printf("\n");
+    }
+    
+    return 0;
+}