How do you convert something to uppercase in c++?

Question

I need to validate some statement but I'm having trouble with validation uppercase I don't wanna create a set of vectors and check within them because I believe the is a function for it

Answer 1

You can use std::toupper() to convert a single character to uppercase:

https://en.cppreference.com/w/cpp/string/byte/toupper

You can apply it to an entire string via std::transform():

https://en.cppreference.com/w/cpp/algorithm/transform

For a string 's', it would look like:

std::transform (
s.begin(),
s.end(),
s.begin(),
[]( unsigned char c ) -> unsigned char
{
return std::toupper( c );
}
);