program to test behavior of c strcmp

strcmp_test.c

#include <string.h>

/*************************
 * strcmp_test
 *
 * Outputs basic test of strcmp as defined in ascii c string.h by default. Pass
 * exactly two parameter strings in order to test those two strings.
 *
 * Examples:
 * $ ./strcmp_test
 * (default test output)
 *
 * $ ./strcmp_test abc bcd
 * Test result for "abc" VS. "bcd":
 * -1
 *
 * $ ./strcmp_test "multi-word string" "and with spaces"
 * Test result for "multi-word string" VS. "and with spaces":
 * 1
 *************************/


void compare_test(const char *a, const char *b)
{
  printf("Test result for \"%s\" VS. \"%s\":\n", a, b);
  int result = strcmp(a, b);
  printf("%d\n\n", result);
}

void perform_default_test()
{
  compare_test("abc", "bcd");
  compare_test("bcd", "abc");
  compare_test("abc", "abc");
  compare_test("ABC", "bcd");
  compare_test("abc", "BCD");
}

int main(int argc, char *argv[])
{
  if (argc == 3) {
    compare_test(argv[1], argv[2]);
  }
  else
  {
    perform_default_test();
  }

  return 0;
}