c++ primer plus 第七章《编程题7.13.8a》

Okwarry

于 2015-08-19 15:43:56 发布

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此程序允许用户输入春夏季秋冬四个季节的费用，并显示每个季节的费用总额。

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/*
 Enter your Spring's expenses: 12.88
 Enter your Summer's expenses: q
 Invalid value!
 Enter your Summer's expenses: 100.90
 Enter your Fall's expenses: 3000
 Enter your Winter's expenses: 45.88
 Spring: 12.88
 Summer: 100.9
 Fall: 3000
 Winter: 45.88
*/
#include <iostream>

using namespace std;

const int Row = 4;
const int Col = 10;
const char Season[Row][Col] = {"Spring", "Summer", "Fall", "Winter"};
void fill_array(double *, const int);
void show_array(double *, const int);

int main() {
    double expense[Row];

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

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

void show_array(double pE[], const int n) {
    for (int i = 0; i < n; i++)
        cout << Season[i] << ": " << pE[i] << endl;
}