使用STL中的array模板类

来源：互联网发布：c语言 const 编辑：程序博客网时间：2024/05/16 03:38

需求是输入四个季节的支出并显示支出，所有的数据都用 array 模板类对象来存储

代码如下：

//array.cpp --  functions with array objects#include <iostream>#include <array>#include <string>//constant data const int Seasons = 4;const std::array<std::string, Seasons> Snames = {"Spring", "Summer", "Fall", "Winter"};void fill ( std::array<double, Seasons> * pa);void show ( std::array<double, Seasons> da );int main(){ std::array< double, Seasons> obj; fill( &obj ); show( obj ); std::cin.get(); std::cin.get(); return 0;}void fill ( std::array<double, Seasons> * pa){using namespace std;for (int i = 0; i < Seasons; i++){cout << "Enter " << Snames[i] << " expenses: ";cin >> (*pa)[i]; // 这个写法有点不理解，不能写成 cin >> pa[i] 或者 cin >> *(pa + i)吗？//cin >> *( pa + i); 错误，为什么错？}}void show ( std::array<double, Seasons> da ){using namespace std;double total = 0.0;cout << "\nEXPENSES\n";for (int i = 0; i < Seasons; i++){cout << Snames[i] << " expenses is: " << da[i] << endl;total += da[i];}cout << "Total expenses is: " << total << endl;}

运行效果如图：

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