CODEWITHSUNDEEP
c++classscopenamespacesglobal
user3134909
user3134909

Reputation: 141

C++ global scope class

I'm learning c++ and I make a program to show input numbers using classes. I used constructors to initialize the x and y. The program works fine but I wanted to use the global scope to show the variables instead of a function. The commented lines is what I wanted it to do but it gives me an error, I tried instead using dublu::x and dublu::y but it says that constants need to be static const... this works but it's not a solution for me. Any ideas?

#include <iostream>
using namespace std;
class dublu{
public:
    int x,y;
    dublu(){cin>>x>>y;};
    dublu(int,int);
void show(void);
};

dublu::dublu(int x, int y){
dublu::x = x;
dublu::y = y;
}

void dublu::show(void){
cout << x<<","<< y<<endl;
}

namespace second{
    double x = 3.1416;
    double y = 2.7183;
}
using namespace second;

int main () {
    dublu test,test2(6,8);
    test.show();
    test2.show();
    /*cout << test::x << '\n';
    cout << test::y << '\n';*/
    cout << x << '\n';
    cout << y << '\n';
    return 0;
}

Upvotes: 0

Views: 467

Answers (1)

vsoftco
vsoftco

Reputation: 56557

The member variables are bounded to each instance. So you need to use

cout << test.x << '\n';

instead, and similarly for test.y. Right now you are using test::x, which works only if the member variable is static, i.e. is shared among all instances of your class.

Upvotes: 2

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