#include "lib.h" int main(int argc, char **argv) { if( argc != 2) { printf("Usage: %s ", argv[0]); exit(1); } char *hex_string = malloc(strlen(argv[1])*2+1); hex_binary_to_string(argv[1], hex_string, strlen(argv[1])); hex_string[strlen(argv[1])*2+1] = '\0'; printf("%s\n", hex_string); }