system("PAUSE");

[tu_user]

// euclid.cpp - Compute Greatest Common Divisor of two positive integers
//              using the Euclidean Algorithm
#include <iostream>
#include<cstdlib>
// Get a positive integer from user
int getPositive(void){
  int current;
  while( 1 ){
      cout << "Please enter a positive integer: ";
      cin >> current;
      if (current > 0) return current;
      cout << "It should be a positive integer";
  }
}
// Compute GCD
int gcd (int dividend, int divisor)
{
  int remaind;
  remaind = dividend % divisor;
  while (remaind != 0) {
       dividend= divisor;
       divisor= remaind;
       remaind= dividend % divisor;
  }
  return divisor;
}
void main(void)
{
  int dividend = getPositive();
  int divisor  = getPositive();
  cout << "The GCD of " << dividend << " and " << divisor << " is "
       <<  gcd(dividend, divisor) << endl;
       system("PAUSE");
       return 0;
}

I cant see the output. y? is that? Although i have used system("PAUSE"); thing.

[laserlight]

Post your compile log.
Also, read up on this article and on namespaces

That said, a possible corrected version of your program is:

// euclid.cpp - Compute Greatest Common Divisor of two positive integers
//              using the Euclidean Algorithm

#include <iostream>
#include <cstdlib>

using std::cin;
using std::cout;
using std::endl;

// Get a positive integer from user
int getPositive() {
	for (;;) {
		int current;
		cout << "Please enter a positive integer: ";
		cin >> current;
		if (current > 0)
			return current;
		cout << "It should be a positive integer\n";
	}
}

// Compute GCD
int gcd(int dividend, int divisor)
{
	int remaind = dividend % divisor;
	while (remaind != 0) {
		dividend = divisor;
		divisor = remaind;
		remaind = dividend % divisor;
	}
	return divisor;
}

int main()
{
	int dividend = getPositive();
	int divisor  = getPositive();
	cout << "The GCD of " << dividend << " and " << divisor << " is "
		<<  gcd(dividend, divisor) << endl;
	system("PAUSE");
	return 0;
}

[WaltP]

Don't use a non-standard operating system command to do something that you can do in the language itself.

Use cin or some form thereof.