#include <iostream>
template <typename T>
void PrintValue(T val)
{
if constexpr (std::is_signed_v<T>)
{
std::cout << "signed";
}
else
{
std::cout << "unsigned";
}
std::cout << std::endl << val << std::endl;
}
int main()
{
int a = -1;
unsigned int b = 5;
unsigned int c = 7;
auto sum = b + a;
PrintValue(sum);
PrintValue(c - b);
PrintValue(b - c);
}
The output is:
unsigned
4
unsigned
2
unsigned
4294967294
As you can see, the sum of signed and unsigned values is unsigned and the difference of two unsigned values is unsigned.
