fix:menu,feat:main function

main.c

@@ -0,0 +1,17 @@
+#include "mysyslib.h"
+
+int main(){
+  char ipt;
+  while(1){
+    ipt = mainMenu();
+    if(ipt=='i'){
+    }else if(ipt=='o'){
+    }else if(ipt=='m'){
+    }else if(ipt=='q'){
+      break;
+    }else{
+      continue;
+    }
+  }
+  return 0;
+}

menuoutput.c

@@ -10,10 +10,21 @@ char mainMenu() {
   }
   char ipt;
   scanf("%c",&ipt);
-  return ipt;
+  switch(ipt){
+    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");
   }
-
-int main(){
-  mainMenu();
-  return 0;
+  return ipt;
 }