yesterday's busy!

This diary should be written yesterday. But yesterday I left from a Mathematics department office at 23:30. Because our teaching evaluation project's all algorithm modules must be modified.
And we, three students, began to modify all modules and test one by one. After we tested the last module, it was 23:30. And we were all tired.
During the testing, we found a strange phenomenon that when we tested whether two same long type number were equal, the system's answers was difference at random. We were puzzled by this problem firstly. At last, we found that when we compare whether two long type number are equal, we should not use "=" directly, and we can use the absolute value of a minus b less than a infinitesimal number. This was the effictive solving means.




Today, Monday, a usually busy day again.
Tommow I will discuss some problem with Mr. Lzm.