int Max(int x, int y)
{  if(x>y)
     return x;
   else
     return y;
}
int main()
{
	int num1 = 10;
	int num2 = 20;
	int max = 0;
	max = Max(num1, num2);
	printf("max=%d\n", max);
   return 0;
}