#ifndef HEADER1_H_
#define HEADER1_H_
namespace ns1 {
class c1 {
public:
unsigned int add_two_numbers(unsigned int no1, unsigned int no2);
c1() = default;
~c1() = default;
};
class c2 {
public:
c2() = default;
~c2() = default;
unsigned int add_three_numbers(unsigned int no1, unsigned int no2, unsigned int no3);
};
}
namespace ns2 {
class c3 {
public:
c3() = default;
~c3() = default;
unsigned int return5();
};
}
#endif