C :

main() 
{ 
int a,b,c,max; 
scanf("%d%d%d",&a,&b,&c); 
max=a; 
if(max<b) 
max=b; 
if(max<c) 
max=c; 
printf("%d",max); 
  
}

C++ :

#include <stdio.h>
int main()
{
	int a[3],i;
	for(int i=0;i<3;i++)
	{
		scanf("%d",&a[i]);
	}
	for(int j=0;j<3;j++)
	{
		for (int r=0;r<3-j-1;r++)
		{
			if (a[r]<a[r+1])
			{
				i=a[r];
				a[r]=a[r+1];
				a[r+1]=i;
			}
		}
	}
	printf("%d\n",a[0]);
}

Pascal :

var
  a,b,c:longint;
begin
  readln(a,b,c);
  if (a<b) and (b<c) then writeln(c);
  if (a<c) and (c<b) then writeln(b);
  if (b<a) and (a<c) then writeln(c);
  if (b<c) and (c<a) then writeln(a);
  if (c<a) and (a<b) then writeln(b);
  if (c<b) and (b<a) then writeln(a);

end.

Java :

import java.util.Scanner;

public class Main {
   private static Scanner s = new Scanner(System.in) ;
   
   public static void main(String[] args) {
	  int a = s.nextInt() ;
	  int b = s.nextInt() ;
	  int c = s.nextInt() ;
	  
	  int temp = 0 ;
	  if(a<b){
		  temp = a ; 
		  a = b ;
		  b = temp ;
	  }
	  if(a<c){
		  temp = a ; 
		  a = c ;
		  c = temp ;
	  }
	  
	  System.out.println(a);
   }
}

Python :

a,b,c = raw_input().split()
a=int(a)
b=int(b)
c=int(c)
if a < b :
	a,b = b,a
if a < c :
    a,c = c,a
print a