C++ program to calculate the maximum in a,b,c?

Question

C++ / C#

Guys, hello everyone!
How to make a program to calculate the maximum in {a,b,c}.
Help please, otherwise it doesn’t work)
(I wanted to do it through if else conditions, but I can’t do it completely)

Answer 1

#include <algorithm>
#include <vector>
int main()
{
  std::vector<int> abc{1,2,3};
  return *std::max_element(abc.begin(), abc.end());
}

Answer 2

std::max(std::max(a,b),c)

Answer 3

https://stackoverflow.com/a/43946752