devc++試驗.h頭文件能不能用 例子應用對否

C++菜鳥學習筆記系列（6）——簡單頭文件的編寫

#include <stdlib.h>
#include <iostream>
#include <string>
#include "Sale_data.h"

using namespace std;



int main()
{
	Sale_data data1 , data2 , *salesptr ;
	
	cin >> data1.bookNo >> data1.unit_sold >> data1.price ;
	cin >> data2.bookNo >> data2.unit_sold >> data2.price ;

	data1.revenue = data1.unit_sold * data1.price;
	data2.revenue = data2.unit_sold * data2.price;

	if ( data1.bookNo == data2.bookNo )
	{
		unsigned int total_num = data1.unit_sold + data2.unit_sold;
		double total_rev = data1.revenue + data2.revenue;
		
		if (total_num != 0)
		{
			cout << "ISBN_Number   "  << "total_number   " << "total_revenue   " << endl;
			cout << data1.bookNo  << "   "  << total_num << "   "  << total_rev << endl ;
		}
	}
	else
	{
		cout << "there is two kinds books" << endl;
		cout << "ISBN_Number   "  << "price   " << "number   " << "revenue   " << endl ;
		cout << data1.bookNo  << "   "  << data1.price << "   "  << data1.unit_sold << "   " << data1.revenue<< endl ;
		cout << data2.bookNo  << "   "  << data2.price << "   "  << data2.unit_sold << "   " << data2.revenue<< endl ;
		cout << "total revenue : " << data1.revenue + data2.revenue ;
	}

	cout << endl << "press any key to continue!" << endl;

	system("pause");
	return 0;
}

Sale_data.h

#ifndef SALE
#define SALE
#include <string>
using namespace std;

struct Sale_data
{
	string bookNo;
	unsigned int unit_sold;
	double revenue;
	double price;
};
#endif

input : 1 3 10
2 3 10
可以運行