Use iostream instead of stdio

_config/nvim/UltiSnips/cpp.snippets

@@ -1,9 +1,10 @@
 snippet main
-#include <stdio.h>
-#include <stdlib.h>
+#include <iostream>
+
+using namespace std;
 
 int main() {
-    printf("Hello, World!\n");
+    cout << "Hello, World!" << endl;
 
     return 0; 
 }