#include<iostream>
class class_test
{
public:
static int a;
};
int class_test::a; // Declare before use
int main()
{
using namespace std;
// int class_test::a; Cannot declare here
class_test::a=20;
printf("\n class_test::a :: %d ", class_test::a );
return 0;
}
OUTPUT
========================================
class_test::a :: 20