/**
 * hello2.c
 *
 * Andi Peng <andi.peng@yale.edu>
 * Section, Week 2
 * 
 * If there are 2 command line arguments, prints out Hello and the 
 * Otherwise prints out Hello, World
 */
 
 #include <stdio.h>
 #include <cs50.h>
 
 int main(int argc, string argv[])
 {
     if (argc == 3)
     {
         printf("Hello, %s!\n", argv[1]);
     }
     else
     {
         printf("Hello, world!\n");
     }
 }