int main(int argc, char *argv[]){ if(argc == 2) print_sieves(atoi(argv[1])); else printf("Please state an interger number.\n"); return 0; }
// 'argc' contains the number of program arguments, and // 'argv' is an array of char pointers, where each // char pointer points to a null-terminated string. int main(int argc, char *argv[]){ clock_t begin = clock(); if(argc == 2){ print_sieves(atoi(argv[1])); clock_t end = clock(); printf("time elapsed: %f seconds\n",(double)(end-begin)/CLOCKS_PER_SEC); } else printf("Please state an interger number.\n"); return 0; }