how to get the max val in an integer in cpp code example

Example 1: int max in c++

2147483647
  unsigned long long int = 18 446 744 073 709 551 615

Example 2: c++ how to get maximum value

x = 1, y  = 2;
fmax(x , y);
//if you want to print it right away:
cout << fmax(x , y);
//if you want to store it:
int j = fmax(x, y);
cout << j;

//output 2