QtCreator警告：implicit conversion changes signedness:'std::basic_string<char, std::char_traits<char>,std::allocator<char>>::size_type'(ake'unsigned int') to 'int'

隐式转换改变了符号：将“std::basic_string<char, std::char_traits<char>, std::allocator<char>>::size_type”（即“unsigned int”）转换为“int”

 

unsigned int num = 0;

int cnt = static_cast<int>(num);