我的计算中的计算有什么问题？ [英] What is wrong with my calculations in my program?

问题描述

我不太确定我的代码中的哪个位置导致导致错误计算的问题。当我运行该程序时，会出现以下警告：C4305：'argument'：从'double'截断到'float'。税金额（ta）和总费用（tc）似乎有问题，谢谢。





当前输出：

税前成本：$ 30.20

税额：$ 30.20

总成本：$ -107374144.00

碎牛肉是 - 海绵

按任意键继续。 。





**应该是什么：

您的项目名称：碎牛肉

税前费用：$ 30.20

税额：$ 2.64

总费用：$ 32.84

碎牛肉是预付的

Im not quite sure where in my code is causing the problem that causes wrong calculations. When I run the program there is a warning of : C4305: 'argument' : truncation from 'double' to 'float'. There seems to be something wrong with Tax amount(ta) and Total cost(tc), Thanks.


Current Output:
Cost before Tax: $30.20
Tax Amount: $30.20
Total Cost: $-107374144.00
ground beef is ex-sponged
Press any key to continue . .


What it **should** be:
Your item name:ground beef
Cost before Tax: $30.20
Tax Amount: $2.64
Total Cost: $32.84
ground beef is ex-sponged

#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<iomanip>
#include<string>

using namespace std;

class item
{
public:
    item(char* = " " ,float=0.0,int=0,float=0.0);
    ~item();
    void print();
    void calc(int);
private:
    char name[20];
    int quan;
    float cost, tp, cbt, tax, tc;
};
item::~item()
{
    cout << name << " is ex-sponged"<<endl;
    system("pause");
    }
item::item(char *w,float x, int y, float z)
{
    strcpy(name, w);
    cost = x;
    quan=y;
    tp = z;
    tax=cost*quan;
    tc=cbt+tax;
    cbt = cost*quan;
}
void item::print()
{
    cout << "Your item name:" << name << endl;
    cout << "Cost before Tax: $" << cbt << endl;
    cout << "Tax Amount: $" << tax << endl;
    cout << "Total Cost: $" << tc << endl;
}

void item::calc(int n)
{
    quan += n;
    cbt = cost*quan;
     tax = cbt*tp/100;
     tc = cbt + tax;
}

int main()
{
    item i("ground beef", 7.55, 4, 8.75);
    cout << setprecision(2) << showpoint << fixed;
    i.print();
}

推荐答案

30.20

税额：

30.20
Tax Amount:

< br>

30.20

总费用：

30.20
Total Cost:

-107374144.00

碎牛肉是预付的

按任意键继续。 。





**应该是什么：

您的项目名称：碎牛肉

税前成本：

-107374144.00
ground beef is ex-sponged
Press any key to continue . .


What it **should** be:
Your item name:ground beef
Cost before Tax:

这篇关于我的计算中的计算有什么问题？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！