D:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\appdata\2\ccicyy5T.o::(.text+0xc3): undefined reference to `std::ostream::operator<<(int)'
D:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\appdata\2\ccicyy5T.o::(.text+0xd5): undefined reference to `std::ostream::operator<<(std::ostream& (*)(std::ostream&))'
D:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\appdata\2\ccicyy5T.o::(.text+0xeb): undefined reference to `std::istream::operator>>(int&)'
D:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\appdata\2\ccicyy5T.o::(.text+0x100): undefined reference to `std::basic_ios<char, std::char_traits<char> >::operator bool() const'
D:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\appdata\2\ccicyy5T.o::(.rdata$.refptr._ZSt3cin[.refptr._ZSt3cin]+0x0): undefined reference to `std::cin'
D:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\appdata\2\ccicyy5T.o::(.rdata$.refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_[.refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_]+0x0): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
D:/msys64/ucrt64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: D:\appdata\2\ccicyy5T.o::(.rdata$.refptr._ZSt4cout[.refptr._ZSt4cout]+0x0): undefined reference to `std::cout'
collect2.exe: error: ld returned 1 exit status