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42 lines
1.0 KiB
42 lines
1.0 KiB
#include <iostream>
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#include <fstream>
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#include <string>
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class Money
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{
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private:
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int yuan, jiao, fen;
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public:
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Money(int _yuan = 0, int _jiao = 0, int _fen = 0)
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: yuan{_yuan}, jiao{_jiao}, fen{_fen}
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{
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}
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friend std::ostream &operator<<(std::ostream &os, const Money &m)
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{
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if (&os == &std::cout)
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return os << m.yuan << "元" << m.jiao << "角" << m.fen << "分\n";
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else
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return os << m.yuan << ' ' << m.jiao << ' ' << m.fen << '\n';
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}
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friend std::istream &operator>>(std::istream &is, Money &m)
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{
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if (&is == &std::cin)
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std::cout << "请输入元角分的数值，以空格分开：";
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return is >> m.yuan >> m.jiao >> m.fen;
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}
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};
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int main()
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{
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std::ofstream ofile{"money.txt"};
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Money m{}, n{};
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std::cin >> m; // 从键盘输入m
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ofile << m; // m写入文件
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ofile.close();
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std::ifstream ifile{"money.txt"};
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ifile >> n; // 从文件读入n
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std::cout << n; // 输出n
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ifile.close();
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return 0;
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} |