c++ header meaning code example
Example 1: what is a header in c++
// my_class.h
#ifndef MY_CLASS_H // include guard
#define MY_CLASS_H
namespace N
{
class my_class
{
public:
void do_something();
};
}
#endif /* MY_CLASS_H */
Example 2: defining class in other file in c++
//ClassOne.hpp:
class ClassOne
{
public:
ClassOne(); // note, no function body
int method(); // no body here either
private:
int member;
};
//ClassOne.cpp:
#include "ClassOne.hpp"
// implementation of constructor
ClassOne::ClassOne()
:member(0)
{}
// implementation of "method"
int ClassOne::method()
{
return member++;
}
//main.cpp:
#include "ClassOne.hpp" // Bring the ClassOne declaration into "view" of the compiler
int main(int argc, char* argv[])
{
ClassOne c1;
c1.method();
return 0;
}