[Fix] The way of getting testcases

[logic-finder]

The current way is inconvenient and inherently dangerous: the program can't check whether a testcase is written within the memory block acquired from the malloc() call.

[lshqqytiger]

Suggestion: Use macro.

#define test(name, argv, input, output) \
  add(tests, &tlen, (testcase) { \
    .name = name, \
    .argv = argv, \
    .input = input, \
    .output = output \
  });

test("usual", "10", "I hate programming in C so much.", "Ihateprogr\namminginCs\nomuch.I'mg\nettinghead\nache.\n");
test(...);
...

[lshqqytiger]

🟢 LGTM

[lshqqytiger]

CI will be restarted today.