我在收集和打印程序中的总和（totalPrice）时遇到问题。
程序反复要求用户输入票证信息，然后计算所有票据的总价格。
如果向其他目的地请求了票证，则程序会通知用户该目的地没有可用的票证。用户可以输入给定的城市名称或全部小写。 往返价格是单程价格乘以1.6。学生可享受20％的折扣。 当用户在询问目的地时输入单词“完成”或“完成”时，程序将输出票证总数及其总价格和退出。
据我所知，一切都运转正常，但总成本的最终输出除外。关于我正在做什么的任何帮助人。我相信这可能是我的逻辑，但我太投入了，看不出我的错误！任何帮助将不胜感激，谢谢：）
using namespace std;
int main() {
double totalPrice = 0; // the sum of all the values after the do while loop is done.
int numberOfTicketsSold; // ehhhh counter?
int counter; // keep track of the number of flights
double temp = 0; // to hold the values while they're being adjusted
double discount = 0; // another temp but for discount
double boston = 350; // constant at 350 per trip
double london = 600;
double paris = 700;
double tokyo = 800;
string input; // might have to use char instead. Lets try it out anyways.
string roundTrip;
string studentDiscount;
cout << "**************************************************************" << endl;
cout << "Enter the information for each ticket." << endl;
cout << "When no more tickets to enter, enter 'Done' for destination." << endl;
cout << "**************************************************************" << endl;
do{
cout << "Enter the destination city:" ; // Want to collect the string inputted to start if statements
cin >> input;
if ( input == "boston" || input == "Boston")
{
counter++; // keeps track of how many flights. For last output
cout << "\nRound trip? [Y/N]" << endl;
cin >> roundTrip;
if (roundTrip == "y" || roundTrip == "Y")
{
temp = boston;
temp = temp * 1.6;
}
else if(roundTrip == "n" || roundTrip == "N")
{
temp = boston;
}
cout << "\nStudent Discount? [Y/N]";
cin >> studentDiscount;
if (studentDiscount == "y" || studentDiscount == "Y")
{
discount = temp;
discount = discount *.20;
temp = temp - discount;
totalPrice = temp;
}
else if(studentDiscount == "N" || studentDiscount == "n")
{
totalPrice = temp;// do nothing right?
}
}
else if ( input == "london" || input == "London")
{
counter++; // keeps track of how many flights. For last output
cout << "\nRound trip? [Y/N]" << endl;
cin >> roundTrip;
if (roundTrip == "y" || roundTrip == "Y")
{
temp = london;
temp = temp * 1.6;
}
else if(roundTrip == "n" || roundTrip == "N")
{
temp = london;
}
cout << "\nStudent Discount? [Y/N]";
cin >> studentDiscount;
if (studentDiscount == "y" || studentDiscount == "Y")
{
discount = temp; // 600
discount = discount *.20;
temp = temp - discount;
totalPrice = totalPrice + temp;
}
else if(studentDiscount == "N" || studentDiscount == "n")
{
totalPrice = totalPrice + temp;// do nothing right?
}
}
else if ( input == "paris" || input == "Paris")
{
counter++; // keeps track of how many flights. For last output
cout << "\nRound trip? [Y/N]" << endl;
cin >> roundTrip;
if (roundTrip == "y" || roundTrip == "Y")
{
temp = paris;
temp = temp * 1.6;
}
else if(roundTrip == "n" || roundTrip == "N")
{
temp = paris;
}
cout << "\nStudent Discount? [Y/N]";
cin >> studentDiscount;
if (studentDiscount == "y" || studentDiscount == "Y")
{
discount = temp;
discount = discount *.20;
temp = temp - discount;
totalPrice = temp;
}
else if(studentDiscount == "N" || studentDiscount == "n")
{
totalPrice = temp;// do nothing right?
}
}
else if ( input == "tokyo" || input == "Tokyo")
{
counter++; // keeps track of how many flights. For last output
cout << "\nRound trip? [Y/N]" << endl;
cin >> roundTrip;
if (roundTrip == "y" || roundTrip == "Y")
{
temp = tokyo;
temp = temp * 1.6;
}
else if(roundTrip == "n" || roundTrip == "N")
{
temp = tokyo;
}
cout << "\nStudent Discount? [Y/N]";
cin >> studentDiscount;
if (studentDiscount == "y" || studentDiscount == "Y")
{
discount = temp;
discount = discount *.20;
temp = temp - discount;
totalPrice = temp;
}
else if(studentDiscount == "N" || studentDiscount == "n")
{
totalPrice = temp;// do nothing right?
}
}
} while (input != "done");
cout << "--------------------------------------------------------------"<< endl;
cout << counter << " tickets sold for a total sum of $" << temp << endl;
cout << "-------------------------------------------------------------";
}