我已经为家庭作业分配了此代码，并且拥有所有必需的输入文件（错误和cateringInput），但是却收到黑屏，但未收到提示消息。我犯了一个菜鸟错误，并且在没有测试它们的情况下执行了这些功能，但是我真的以为我做对了。
我尝试解决我的功能，但似乎一切正常。我知道这可能是一个愚蠢的错误，但是我似乎真的无法解决它：/
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
int getInput(ifstream& infile, ofstream& errorfile, int &partyID, int &numAdults, int &numChildren, char &mealType, char &isWeekend, double &deposit);
double calculateCost(int numAdults, int numChildren, char mealType);
void additionalCost(double &cost, double &tip, double &tax, double &surcharge, char isWeekend);
void toatlBill(ofstream& outfile, int partyID, int numAdults, int numChildren, double cost, double tip, double tax, double surcharge, double deposit);
int getInput(ifstream& infile, ofstream& errorfile, int &partyID, int &numAdults, int &numChildren, char &mealType, char &isWeekend, double &deposit)
{
infile >> partyID >> numAdults >> numChildren >> mealType >> isWeekend >> deposit;
int errorFlag = 1;
// Check for errors in input (validation)
if (numAdults < 0)
{
errorfile << "PartyID: " << partyID << endl;
errorfile << "Number of adults cannot be negative" << endl;
errorFlag = 0;
}
if (numChildren < 0)
{
errorfile << "PartyID: " << partyID << endl;
errorfile << "Number of children cannot be negative" << endl;
errorFlag = 0;
}
if (mealType != 'S' && mealType != 'D')
{
errorfile << "PartyID: " << partyID << endl;
errorfile << "Meal type should be either 'S' or 'D' " << endl;
errorFlag = 0;
}
if (isWeekend != 'Y' && isWeekend != 'N')
{
errorfile << "PartyID: " << partyID << endl;
errorfile << "Weekend should be either 'Y' or 'N' " << endl;
errorFlag = 0;
}
if (deposit < 0)
{
errorfile << "PartyID: " << partyID << endl;
errorfile << "Deposit amount cannot be negative" << endl;
errorFlag = 0;
}
return errorFlag;
}
double calculateCost(int numAdults, int numChildren, char mealType)
{
double adultMealCost, childrenMealCost, cost;
if (mealType == 'D')
{
adultMealCost = 25.80;
}
else
{
adultMealCost = 21.75;
}
childrenMealCost = adultMealCost * 0.6; // 60% of adult meal cost
cost = (numAdults * adultMealCost) + (numChildren * childrenMealCost);
return cost;
}
void additionalCost(double &cost, double &tip, double &tax, double &surcharge, char isWeekend)
{
tip = cost * 0.18; // 18%
tax = cost * 0.1; // 10%
double total = cost + tip + tax;
if (isWeekend == 'Y')
{
surcharge = total * 0.07; // 7%
}
else
{
surcharge = 0;
}
}
void toatlBill(ofstream& outfile, int partyID, int numAdults, int numChildren, double cost, double tip, double tax, double surcharge, double deposit)
{
double total = cost + tip + tax + surcharge;
outfile << setprecision(2) << fixed;
outfile << endl << "--------------------------------------" << endl;
outfile << endl << setw(20) << left << "PartyID: " << setw(5) << right << partyID << endl;
outfile << setw(20) << left << "Number of adults: " << setw(5) << right << numAdults << endl;
outfile << setw(20) << left << "Number of children: " << setw(5) << right << numChildren << endl;
outfile << endl << setw(20) << left << "Meal Cost: " << setw(6) << right << "$ " << cost << endl;
if (surcharge > 0)
{
outfile << setw(20) << left << "Surcharge: " << setw(6) << right << "$ " << surcharge << endl;
}
outfile << setw(20) << left << "Tax: " << setw(6) << right << "$ " << tax << endl;
outfile << setw(20) << left << "Tip: " << setw(6) << right << "$ " << tip << endl;
outfile << setw(20) << left << "Total party cost: " << setw(6) << right << "$ " << total << endl;
if (deposit > 0)
{
outfile << setw(20) << left << "Deposit: " << setw(6) << right << "$ " << deposit << endl;
}
outfile << setw(20) << left << "Total Balance due: " << setw(6) << right << "$ " << (total - deposit) << endl;
}
int main()
{
// Open the input file
ifstream infile;
infile.open("cateringInput.txt");
// Open the error file
ofstream errorfile;
errorfile.open("error.txt");
// Open the output file
ofstream outfile;
outfile.open("cateringOutput.txt");
int partyID, numAdults, numChildren;
char mealType, isWeekend;
double deposit, cost, tip, tax, surcharge;
while (!infile.eof()) // End of the file has not been reached yet
{
int errorFlag = getInput(infile, errorfile, partyID, numAdults, numChildren, mealType, isWeekend, deposit);
if (errorFlag) // Flag for errors in the data
{
if (numAdults > 0 || numChildren > 0)
{
cost = calculateCost(numAdults, numChildren, mealType);
additionalCost(cost, tip, tax, surcharge, isWeekend);
toatlBill(outfile, partyID, numAdults, numChildren, cost, tip, tax, surcharge, deposit);
}
}
}
outfile << endl << "--------------------------------------" << endl;
infile.close();
errorfile.close();
outfile.close();
cout << "Finished! Please verify by checking 'cateringOutput.txt'" << endl;
system("pause");
return 0;
}
只需要编译一下，就不会创建输出文件，也不会得到cout <<，它是我用来确认程序已执行的
编辑1：
好像这部分代码搞砸了：
while (!infile.eof()) // End of the file has not been reached yet
{
int errorFlag = getInput(infile, errorfile, partyID, numAdults, numChildren, mealType, isWeekend, deposit);
if (errorFlag) // Flag for errors in the data
{
if (numAdults > 0 || numChildren > 0)
{
cost = calculateCost(numAdults, numChildren, mealType);
additionalCost(cost, tip, tax, surcharge, isWeekend);
toatlBill(outfile, partyID, numAdults, numChildren, cost, tip, tax, surcharge, deposit);
}
}
}
我在这个while循环上方放置了一个COUT，但它却通过了，但是如果我将COUT放在它的正下方，它就不会通过。我虽然不知道：/
答案 0 :(得分：1)
我给了它一个有效的输入文件，它起作用了。然后我给它一个无效的输入文件，但失败了。也许您只是没有给它提供有效的输入文件：
有效的输入文件内容：
1 1 1 S Y 1
无效的输入文件内容：
1.x 1 1 S Y 1
有效输入文件的输出文件内容：
--------------------------------------
PartyID: 1
Number of adults: 1
Number of children: 1
Meal Cost: $ 34.80
Surcharge: $ 3.12
Tax: $ 3.48
Tip: $ 6.26
Total party cost: $ 47.66
Deposit: $ 1.00
Total Balance due: $ 46.66
--------------------------------------
PartyID: 1
Number of adults: 1
Number of children: 1
Meal Cost: $ 34.80
Surcharge: $ 3.12
Tax: $ 3.48
Tip: $ 6.26
Total party cost: $ 47.66
Deposit: $ 1.00
Total Balance due: $ 46.66
--------------------------------------
我根本没有修改您的来源。