1ac91027caa22212ac35de969fa53348b70e9bb28Johnny Chen#include <stdio.h> 2ac91027caa22212ac35de969fa53348b70e9bb28Johnny Chen 3ac91027caa22212ac35de969fa53348b70e9bb28Johnny Chenint main(int argc, char const *argv[]) { 4ac91027caa22212ac35de969fa53348b70e9bb28Johnny Chen printf("Hello world.\n"); 5ac91027caa22212ac35de969fa53348b70e9bb28Johnny Chen return 0; 6ac91027caa22212ac35de969fa53348b70e9bb28Johnny Chen} 7