以下是输出结果：
Roller Coaster City Amusement Park
Enter number of Children Tickets or -1 to stop...10
Enter number of Adult Tickets......11
Roller Coaster City Amusement Park
-------------------------
Tickets Price Total
Children 10 10.00 100.00
Adults 11 25.00 275.00
21
Security Fee 15.00
Total Bill 410.00
Cash Received........
总账单应该输出390.00。
这是我的C ++代码：
// Author: Bart Allen
// Source file: amuseOne.cpp
/*
Description: A program designed to output the number of tickets being purchased
for the entry into the amusement park
*/
// IDE used: Visual Studio 2015
#include <iostream>
#include <iomanip>
using namespace std;
//the constants of the function
const double CHILDPRICE = 12.00;
const double CHILDDISC = 10.00;
const double ADULTPRICE = 25.00;
const double Secfee = 15.00;
int main ()
{
//appropiate variable declarations
double childTotalDisc;
int childTix;
int adultTix;
double childTotal;
double adultTotal;
double totalBill;
double payment;
double change;
int totalTickets;
int confirmNUM = 100;
//Outputs the title of the amusement park
cout << "\n Roller Coaster City Amusement Park" << endl << endl;
cout << "\tEnter number of Children Tickets or -1 to stop...";
cin >> childTix;
while (childTix != -1)
{
cout << "\tEnter number of Adult Tickets......";
cin >> adultTix;
//Calculations are placed here
//childTotalDisc = childTix * CHILDDISC;
childTotal = childTix * CHILDPRICE;
adultTotal = adultTix * ADULTPRICE;
totalBill = childTotal + adultTotal;
totalTickets = childTix + adultTix;
//Sets the decimal place to only display two decimal places
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(2);
//Outputs the number of tickets being purchased, along with the calculated totals
cout << "\n\n Roller Coaster City Amusement Park";
cout << "\n -------------------------";
cout << "\n\n Tickets Price Total\n";
if (childTix >= 8)
{
childTotal = CHILDDISC * childTix;
cout << " Children " << setw(3) << childTix
<< setw(14) << CHILDDISC
<< setw(11) << childTotal;
}
else
{
cout << " Children " << setw(3) << childTix
<< setw(14) << CHILDPRICE
<< setw(11) << childTotal;
}
cout << "\n Adults " << setw(5) << adultTix
<< setw(14) << ADULTPRICE
<< setw(11) << adultTotal;
cout << "\n\n " << setw(7) << totalTickets;
if ((totalTickets >= 20) || (childTix >= 14))
{
cout << "\n Security Fee " << setw(27) << Secfee;
cout << "\n\n Total Bill " << setw(27) << totalBill + Secfee;
}
else
{
cout << "\n\n Total Bill " << setw(27) << totalBill;
}
//asks for the users input of amount of money being submitted to cover the final cost
cout << "\n\n\t Cash Received........";
cin >> payment;
do
{
cout << "\tCash must be >= Total Bill ";
cout << "\n\n\t Cash Received........";
cin >> payment;
} while (payment < totalBill);
change = payment - totalBill;
cout << "\n Change " << setw(28.5) << change << endl;
cout << " Confirmation number = " << confirmNUM++ << endl;
cout << "\n Enter number of Children Tickets or -1 to stop...";
cin >> childTix;
}
system("pause");
return 0;
}
字面上这是我对这个程序的唯一问题，幸运的是没有发生错误，这是我的项目！任何建议都会有帮助！
答案 0 :(得分：2)
您已使用从totalBill计算的childTotal进行CHILDPRICE计算，之后您将childTotal更改为CHILDDISC，并忘记相应地更新totalBill。
因此，我建议您进行childTix >=8检查，在那里计算其他所有内容，并将剩下的代码留给显示内容而不再进行任何计算。
替换：
childTotal = childTix * CHILDPRICE;
adultTotal = adultTix * ADULTPRICE;
totalBill = childTotal + adultTotal;
totalTickets = childTix + adultTix;
使用：
if (childTix >= 8)
{
childTotal = childTix * CHILDDISC;
}
else
{
childTotal = childTix * CHILDPRICE;
}
adultTotal = adultTix * ADULTPRICE;
totalBill = childTotal + adultTotal;
totalTickets = childTix + adultTix;
从显示逻辑的位置删除childTotal = CHILDDISC * childTix;。
修改
您只是显示totalBill + Secfee而未将Secfee实际添加到totalBill。
所以替换：
if ((totalTickets >= 20) || (childTix >= 14))
{
cout << "\n Security Fee " << setw(27) << Secfee;
cout << "\n\n Total Bill " << setw(27) << totalBill + Secfee;
}
else
{
cout << "\n\n Total Bill " << setw(27) << totalBill;
}
使用：
if ((totalTickets >= 20) || (childTix >= 14))
{
cout << "\n Security Fee " << setw(27) << Secfee;
totalBill += Secfee;
cout << "\n\n Total Bill " << setw(27) << totalBill;
}
else
{
cout << "\n\n Total Bill " << setw(27) << totalBill;
}
此外，您应该在此处使用while而不是do while，否则即使输入了正确的输入也会重新输入，因为do while至少要运行一次。< / p>
所以替换：
cout << "\n\n\t Cash Received........";
cin >> payment;
do
{
cout << "\tCash must be >= Total Bill ";
cout << "\n\n\t Cash Received........";
cin >> payment;
} while (payment < totalBill);
使用：
cout << "\n\n\t Cash Received........";
cin >> payment;
while (payment < totalBill)
{
cout << "\tCash must be >= Total Bill ";
cout << "\n\n\t Cash Received........";
cin >> payment;
}
<强> EDIT2：
如果您仍希望使用do while，请执行以下操作：
//cout << "\n\n\t Cash Received........"; remove this line
//cin >> payment; remove this line
do
{
cout << "\n\n\t Cash Received........";
cin >> payment;
if(payment < totalBill)
{
cout << "\tCash must be >= Total Bill ";
}
}
while (payment < totalBill);