// Use of semicolon in "if"
#include <iostream>
using namespace std;
int main()
{
  int a=2;              
  int b=4;

  //OK
  if (a < b)
      cout << "yes";
  else 
      cout << "no";

  //NEEDS A SEMICOLON BEFORE else
  if (a < b)
      cout << "yes"
  else 
      cout << "no";

  //OK
  if (a < b)
  {
      cout << "yes";
  }
  else 
      cout << "no";

  //; AFTER THE FIRST BRACE CAUSES ERROR
  if (a < b)
  {
      cout << "yes";
  };
  else 
      cout << "no";

  system("pause");
  return 0;
}