Question

您好我正在开发一个程序，用于将用户的价格输入存储到数组中。然后有一个模块接受价格数组和退税。这是我到目前为止所拥有的。我的模块一直在生产LNK2019。

#include <iostream>
using namespace std;

    double PrArray[20] = {}, total_price, tax_rate, price, tax;
    int i;
    double TAXOWED();
void main()
   {
    cout << "input the sales tax rate as a decimal ";
    cin >> tax_rate;
    cout << "\nplease enter a price or 0 to quit ";
    i = 0;
    cin >> price;
    PrArray[i] = price;
    while (price > 0 && i < 19)
{
    i++;
    cout << "please enter a price or 0 to quit ";
    cin >> price;
    PrArray[i] = price;
}
for (i = 0; i < 19; i++)
{
    cout << "\n";
    cout << PrArray[i];
}

TAXOWED();

system("PAUSE");
return;

}
double TAXOWED(double PrArray[], int i)
{
    double total_tax;
    for (i = 0; i < 19; i++)
{
    tax = tax_rate * PrArray[i];
    total_tax = tax;
}
    return(total_tax);
}

Answer 1

您的函数声明和定义不匹配

// Declaration
double TAXOWED();

// Definition
double TAXOWED(double PrArray[], int i);

所以基本上你是在声明一个函数并且从不定义它，然后在下面定义一个单独的函数。

Answer 2

转发您的评论，代码应如下所示：

#include <iostream>
using namespace std;

double TAXOWED(double price, double tax_rate)
{
    return tax_rate * price;
}

int main()
{
    double PrArray[20], total_tax[20], tax_rate, price;

    cout << "input the sales tax rate as a decimal ";
    cin >> tax_rate;
    cout << "\nplease enter a price or 0 to quit ";
    cin >> price;
    if ( price == 0 )
        return -1;
    int i = 0;
    PrArray[i] = price;
    for (i = 1; i < 20; i++)
    {
        cout << "please enter a price or 0 to quit " ;
        cin >> price;
        PrArray[i] = price;
    }
    for (int i = 0 ; i < 20; i++)
        total_tax[i] = TAXOWED(PrArray[i], tax_rate);
    for (int i = 0; i < 20; i++)
        cout << "Tax for price #" << i << " : " << total_tax[i] << endl;

    system("PAUSE");
    return 0; 
}

此代码允许您为每个价格设置tax_rate，每个price值和输出tax_rate。

Answer 3

好的，这就是我现在拥有的。我需要最后的图表将所有总价格加在一起

#include <iostream>
using namespace std;
// declerations
double PrArray[20], total_tax[20], tax_rate, price, total_price;
int i;
double TAXOWED(double price, double tax_rate)
{
return tax_rate * price;
}
void main()
{
cout << "input the sales tax rate as a decimal ";
cin >> tax_rate;
cout << "\nplease enter a price or 0 to quit ";
i = 0;
cin >> price;
PrArray[i] = price;
while (price > 0 && i < 19)
{
    i++;
    cout << "please enter a price or 0 to quit ";
    cin >> price;
    PrArray[i] = price;
}

for (int i = 0; i < 20; i++)
{
    total_tax[i] = TAXOWED(PrArray[i], tax_rate);
}

system("CLS");


cout << "                                   Prices";

cout << "\ntaxrate % " << tax_rate;

cout << "\nprices              tax             Total price ";
cout << "\n__________________________________________________";

for (int i = 0; i < 20; i++)
{
    cout << "\n" << PrArray[i] << "                   " << total_tax[i] << "                   " << PrArray[i] + total_tax[i];
}
for (int)
system("PAUSE");
return;

}

数组和模块

3 个答案: