#include <iostream>

using namespace std;

void read2(int&, int&);
int max(int, int);
void writemax(int);

int main()
{

  int val1=20, val2=10, maxval;

  read2(val1, val2);
  maxval=max(val1, val2);
  writemax(maxval);

  return 0;
}

void read2(int &v1, int &v2)
{
  cout << "Enter the first value: ";
  cin >> v1;
  cout << "Enter the second value: ";
  cin >> v2;
}

int max(int v1, int v2)
{
  if (v1 >= v2)
    return v1;
  else
    return v2;
}

void writemax(int mval)
{
  cout << "max is " << mval << endl;
}