c++ - 如何让月份停止显示 1.00、2.00 等

Question

我是 c++ 的新手，我正在编写一个程序来计算三个月期末储蓄账户的余额。我应该使用循环，我已经这样做了并且没有太大问题。我遇到的问题是存款、取款、当前余额等的所有数字都应该显示为 x.xx，我得到了那个输出，但它也在一个月内这样做。我如何才能使月份不显示为 x.xx？ 这是我的代码:

#include "pch.h"
#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

int main()
{
    double startbalance;
    double annualrate;
    double monthlyrate;
    double deposit;
    double withdrawal;
    double totaldeposit = 0;
    double totalwithdrawal = 0;
    double totalinterest = 0;
    double monthstart = 0;
    double monthend = 0;
    printf("Welcome to Your Bank!\n");
    cout << "What is your starting Balance? $";
    cin >> startbalance;
    cout << "What is the annual interest rate?. Please enter whole value. For example 6 for 6% :";
    cin >> annualrate;
    monthend += startbalance;
    for (double month = 1; month <= 3; month++)
    {
        cout << "Month #" << month << endl;
        do
        {
            cout << setprecision(2) << fixed;
            cout << "Current Balance: $" << monthend << endl;
            cout << "Please enter total amount of deposits: $";
            cin >> deposit;

            if (deposit < 0)
            {
                cout << "Deposit must be a positive number!\n";
            }
        } while (deposit < 0);
        totaldeposit += deposit;
        monthend += deposit;
        do
        {
            cout << "Please enter total amount of withdrawals: $";
            cin >> withdrawal;
            if (withdrawal < 0 || withdrawal > monthend)
            {
                cout << "Withdrawal must be a positive number and not be larger than balance: $" << monthend << endl;
            }
        } while (withdrawal < 0 || withdrawal > totaldeposit);
        cout << endl;
        totalwithdrawal += withdrawal;
        monthend -= withdrawal;
        monthlyrate = ((monthstart + monthend) / 2 * (annualrate / 12));
        totalinterest += monthlyrate;
        cout << "New Balance: $" << monthend << "\n";

    }
    cout << endl;
    cout << fixed << showpoint << setprecision(2);
    cout << "Start Balance:         " << setw(9) << "$" << startbalance << "\n";
    cout << "Total Deposits:        " << setw(9) << "$" << totaldeposit << "\n";
    cout << "Total Withdrawals:     " << setw(9) << "$" << totalwithdrawal << "\n";
    cout << "Total Interest Earned: " << setw(9) << "$" << totalinterest << "\n";
    cout << "Final balance:         " << setw(9) << "$" << monthend << "\n";

    return 0;
}

Answer 1

只需在显示之前将您的月份变量类型转换为 int。

cout << "Month #" << (int)month << endl;

这应该可以解决您的问题。