test.cpp: In function ‘int main()’: test.cpp:4:20: error: ‘strerror’ was not declared in this scope 4 | printf("%s\n", strerror(0)); | ^~~~ test.cpp:2:1: note: ‘strerror’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’ ...
python 判断当前时间是否在一个时间范围内