C :

#include<stdio.h>
int main(){
  int a,b;
  int max;
  scanf("%d,%d",&a,&b);
  max=a;
  if(a<b)
    max=b;
  printf("max=%d",max);
  return 0;
}

C++ :

#include <stdio.h>
int main() {
	int max(int x, int y);
	int a, b, c;
	scanf("%d,%d", &a, &b);
	c = max(a, b);
	printf("max=%d\n", c);
	return 0;
}
int max(int x, int y) {
	int z;
	if (x > y) z = x;
	else z = y;
	return z;
}

Pascal :

var s:string;
    p,a,b,x:longint;
begin
 readln(s);
 p:=pos(',',s);
 val(copy(s,1,p-1),a);
 val(copy(s,p+1,length(s)-p),b);
 if a>b then x:=a else x:=b;
 write('max=',x);
end.

Java :

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner cin = new Scanner(System.in);
        String s = cin.next();
        s = s.replaceAll(",", "");
        int a = Integer.valueOf(s.substring(0, 1));
        int b = Integer.parseInt(s.substring(1));
        System.out.println("max="+Math.max(a, b));
    }
}

Python :

print "max=%d" %max(int(x) for x in raw_input().split(','))

C# :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace C语言
{
    class _1_3
    {
        static void Main() {
            int max,a = Convert.ToInt32(Console.Read())-48; 
            Console.Read();
            int b; //b = int.Parse(Console.Read());
            b =Convert.ToInt32( Console.Read())-48;
            if (a > b) max = a;
            else max = b;
            Console.WriteLine("max={0}",max);
            Console.ReadLine(); Console.ReadLine();
            return;
        }
    }
}