c++ primer plus 第七章《编程题7.13.8b》

Okwarry

于 2015-08-19 15:44:40 发布

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此程序允许用户输入四个季节的费用，并将其存储在数组中。用户输入时，如果输入无效，程序会提示错误并要求重新输入。最终，程序将显示每个季节的费用。

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/*
 Enter your Spring's expenses: 889.123
 Enter your Summer's expenses: p
 Invalid value!
 Enter your Summer's expenses: 99.999
 Enter your Fall's expenses: 10000
 Enter your Winter's expenses: 600
 Spring: 889.123
 Summer: 99.999
 Fall: 10000
 Winter: 600
*/
#include <iostream>

using namespace std;

const int Row = 4;
const int Col = 10;
const char Season[Row][Col] = {"Spring", "Summer", "Fall", "Winter"};
struct money {
    double ex[Row];
};

void fill_array(money &, const int);
void show_array(money &, const int);

int main() {
    money expenses;

    fill_array(expenses, Row);
    show_array(expenses, Row);
}

void fill_array(money & expenses, const int n) {
    int i = 0;
    while (i < n) {
        cout << "Enter your " << Season[i] << "'s expenses: ";
        if (!(cin >> expenses.ex[i])) {
            cin.clear();
            while (cin.get() != '\n')
                ;
            cout << "Invalid value!\n";
            continue;
        }
        i++;
    }
}

void show_array(money & expenses, const int n) {
    for (int i = 0; i < n; i++)
        cout << Season[i] << ": " << expenses.ex[i] << endl;
}