Improved main-snippet.

snippets/c++-mode/io

@@ -0,0 +1,5 @@
+# -*- mode: snippet -*-
+# name: io
+# key: io
+# --
+#include <iostream>

snippets/c++-mode/main

@@ -4,6 +4,7 @@
 # --
 int main(${1:int argc, char *argv[]})
 {
-    $0
+    ${0:const vector<string> args(argv, argv + argc);}
+
     return 0;
 }