c++ 类 helloworld

a.h

#ifndef A_H_
#define A_H_
#include <iostream>

class Tdate{
public:
  void Set(int,int,int);
  int IsLeapYear();
  void Print();
private:
  int month;
  int day;
  int year;
};

#endif 

　　

a.cc

#include <iostream>      
#include "a.h"                          
using namespace std;

void Tdate::Set(int m,int d,int y)
{
  month=m;  day=d;  year=y; 
}

int Tdate::IsLeapYear()
{
  return (year%4==0&&year%100!=0)||(year%400==0);
}

void Tdate::Print()
{
   cout <<month <<"/" <<day <<"/" <<year <<endl;
}

　　

main.cc

#include        <cstdlib>
#include        <fstream>
#include        <iomanip>   
#include        <iostream>  
#include        "a.h"

using namespace std;
                                                                                                                                                                                 
        int
main ( int argc, char *argv[] )
{
    Tdate s;
    s.Set(2,15,1988);
    s.Print();
        cout    << "\nProgram " << argv[0] << endl << endl;

        return EXIT_SUCCESS;      
}               // ----------  end of function main  ---------- 

　　

编译：Makefile

all:main                                                                                                                                                                         
main:main.cc a.cc
        g++ -g -Wall -O0 main.cc a.cc -o main

　　

*********output*******
2/15/1988

Program ./main