#include #include #include #include extern int main(int argc, char* argv[]) { if(argc != 3) { printf("%s c string\n", argv[0]); return 1; } if(char_in_array(argv[1][0], argv[2])) { printf("%c is in %s\n", argv[1][0], argv[2]); } else { printf("%c is NOT in %s\n", argv[1][0], argv[2]); } return 0; }