13a4622ecd670637002852690a54bcaa9339909d8Johnny Chen#include <stdio.h> 23a4622ecd670637002852690a54bcaa9339909d8Johnny Chen 33a4622ecd670637002852690a54bcaa9339909d8Johnny Chenint main(int argc, char const *argv[]) { 43a4622ecd670637002852690a54bcaa9339909d8Johnny Chen printf("Hello world.\n"); 53a4622ecd670637002852690a54bcaa9339909d8Johnny Chen return 0; 63a4622ecd670637002852690a54bcaa9339909d8Johnny Chen} 7