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Source Code
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#include <iostream>
#include"header.h"
int main()
{
NS::A obj; //this uses default constructor of class A inside namespace NS
obj.printAge();
return 0;
}
#ifndef HEADER_H
#define HEADER_H
namespace NS
{
class A
{
public:
//declaration for default constructor
A();
//declaration for member function
void printAge();
private:
int age;
};
}
#endif
#include"header.h"
#include <iostream>
//define default constructor
NS::A::A(): age(0)
{
std::cout<<"default consttuctor used"<<std::endl;
}
//define member function printAge
void NS::A::printAge()
{
std::cout<<age<<std::endl;
}
Compiling Program...
Standard Input:
Interactive Console
Text
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