ADD file via upload

step1.c

@@ -0,0 +1,33 @@
+#include <stdio.h>
+
+int main() {
+    char choice;
+
+    do {
+        printf("                              1.Input\n");
+        printf("                              2.Output\n");
+        printf("                              3.Order\n");
+        printf("                              4.Quit\n");
+        printf("Please enter your choice: ");
+        scanf(" %c", &choice);
+
+        switch (choice) {
+        case 'i':
+            printf("You are trying to Input info\n");
+            break;
+        case 'o':
+            printf("You are trying to Output info\n");
+            break;
+        case 'm':
+            printf("You are trying to Make things ordered\n");
+            break;
+        case 'q':
+            printf("You are about to Quit\n");
+            break;
+        default:
+            printf("Wrong input\n");
+        }
+    } while (choice != 'q');
+
+    return 0;
+}