c++ - How can a template function get max of an int or a char

Question

#include <iostream>
using namespace std;

template <class MyType>
MyType GetMax (MyType a, MyType b, MyType c) {
  return std::max(std::max(a, b), c);
}

int main () {
  int a = 5, b = 6, c = 7, d;
  char e [] = "1", f [] = "2", g [] = "3", h; 
  d=GetMax<int>(a,b,c);
  cout << d << endl;
}

error: no matching function for call to 'GetMax(char [2], char [2], char [2])'

The program works fine with int but i am not sure what the problem is for char