Question

我应该制作一个运输程序，询问用户一些基本问题。以下是说明：在线购物者搜索网络以查找商品，购买商品来自税率最低的州。编写一个简单的C ++程序来执行以下操作：询问用户项目的单价，购物者想要购买的商品数量，第一个州的名称，第一个州的税率，以及第二州和第二州的税率。然后，计算每个州的总成本，并决定购物者应该从哪个州购买该物品。向购物者显示以下内容：单位项目成本，购买的商品数量，第一个州的名称和税率，第二个州的名称和税率，以及您对购物者应从哪个州购买的建议

列出程序中的所有文字和变量。

到目前为止，这是我的代码：

#include <iostream>
#include <cmath>
#include <cstring>

using namespace std;

int main()
{
double itemPrice, numberItem, taxRate, totalCost;
double stateTax1, stateTax2;
int stateName1, stateName2;

// ask the item's price
cout << "What is the price of the item?\n";
cin >> itemPrice;

// ask the # items
cout << "How many items are you going to purchase?\n";
cin >> numberItem;

// ask the name of the first state
cout << "What state are you having it shipped to?\n";
cin >> stateName1;

// ask the tax rate of the first state
cout << "What is the tax rate in " << stateName1 << "?\n";
cin >> stateTax1;

// ask the name of the second state
cout << "What state are you having shipped from?\n";
cin >> stateName2;

// ask the tax rate of the second state
cout << "What is the tax rate in " << stateName2 << "?\n";
cin >> stateTax2;

// first if the first state has a lower tax rate
// else if second state has lower tax rate
if (stateTax1 < stateTax2)
{
    totalCost = itemPrice * numberItem * stateTax1;

    cout << "The item cost is " << itemPrice << ".\n";
    cout << "The number of items is " << numberItem << ".\n";
    cout << "The name of the first state is " << stateName1 << ".\n";
    cout << "The tax rate of the first state is " << stateTax1 << ".\n";
    cout << "The name of the second state is " << stateName2 << ".\n";
    cout << "The tax rate of the second state is " << stateTax2 << ".\n";
    cout << "You should consider purchasing the item from " << stateName1 << ".\n";
}
else
{
    totalCost = itemPrice * numberItem * stateTax2;

    cout << "The item cost is " << itemPrice << ".\n";
    cout << "The number of items is " << numberItem << ".\n";
    cout << "The name of the first state is " << stateName1 << ".\n";
    cout << "The tax rate of the first state is " << stateTax1 << ".\n";
    cout << "The name of the second state is " << stateName2 << ".\n";
    cout << "The tax rate of the second state is " << stateTax2 << ".\n";
    cout << "You should consider purchasing the item from " << stateName2 << ".\n";
}
return 0;
}

我的问题是如何让stateName变量正常工作。我确信这是我应该知道的一些基本字符串，但我不知道。除此之外，我相信我的其余代码正常工作。虽然任何和所有提示都将非常感激。

Answer 1

＆＃34;向购物者显示以下内容：单位项目成本，购买的商品数量，第一个州的名称和税率，第二个州的名称和税率以及您的推荐购物者应该从哪个州购买。＆＃34;

代码中的变量定义

   int stateName1, stateName2;
// ^^^

将仅接受输入语句的整数数值

cin >> stateName1;

无论何时输入类似

的内容

Oklahoma

在输入提示符中，std::cin将设置为fail()状态，并且忽略进一步输入，除非您致电std::cin.clear();

＆＃34;我的问题是如何让stateName变量正常工作。＆＃34;

您可能希望接受stateName1和stateName2的字母数字输入，因此类型必须为std::string，而不是int

std::string stateName1, stateName2;

应该是合适的（请注意，您需要#include <string>代替#include <cstring>才能执行此操作。

变量类型的问题

1 个答案: