added prompt for end

Signed-off-by: BuildTools <unconfigured@null.spigotmc.org>

sum.c

@@ -15,7 +15,7 @@ int main() {
   int* arr = malloc(size * sizeof(int));
   
   while(end_scan) {
-    printf("Enter a number: ");
+    printf("(Type EOF to end) Enter a number: ");
     if (scanf("%d", &(arr[pos])) == EOF) {
       end_scan = 0;
     }