First, the purpose
1、
Two, reference
1. C++ placeholder explanation
https://blog.csdn.net/yubing841026/article/details/11257655
- Summary: good: know the 8, 10, hexadecimal representation; placeholders of various lengths
https://blog.csdn.net/yubing841026/article/details/11257655
- Summary: good: know the 8, 10, hexadecimal representation; placeholders of various lengths