c++ - 为什么 int plus float 显示奇​​怪的数字？

Question

我是 C++ 的新手，我正在努力完成我的第一个作业。我不需要决定，但我想知道我做错了什么？这是我的代码:

#include <iostream>
using namespace std;

int main(){

    int chTenders;
    int frOrders;
    int macCh;
    int drinks;
    int sauces;
    float tip;
    float subtotal;
    subtotal = chTenders + frOrders + macCh + drinks + sauces + tip;

    cout << "How many chicken tenders would you like?\n";
    cin >> chTenders;
    cout << "How many orders of fries would you like?\n";
    cin >> frOrders;
    cout << "How many orders of mac and cheese would you like?\n";
    cin >> macCh;
    cout << "How many drinks would you like?\n";
    cin >> drinks;
    cout << "How many sauces would you like?\n";
    cin >> sauces;
    cout << "How much would you like to tip?\n";
    cin >> tip;

    cout << "====Slim's Order====\n";
    cout << "Subtotal $" << subtotal << endl;


    return 0;
        }

当我编译并运行它时，它给了我 $2.60929e+08 而不是 6.0:

How many chicken tenders would you like?
1
How many orders of fries would you like?
1
How many orders of mac and cheese would you like?
1
How many drinks would you like?
1
How many sauces would you like?
1
How much would you like to tip?
1
====Slim's Order====
Subtotal $2.60929e+08

Answer 1

我认为你的计算顺序刚刚好。 subtotal在您将输入值接收到加数( chTenders 、 frOrders 等)之前计算。移动 subtotal=...行到 cin << tip 之后声明。