Question

所以我一直在制作这个节目一段时间。我已经浏览了整个互联网，但我找不到任何解决方案。每当我在arr [i] .question和arr [i] .answer中输入我的输入时，它说我的问题是错误的，而我没有回答这个问题。我尝试过使用cin.ignore（），cin.clear（）和cin.sync（）。我可能一直在错误的地方使用它们，但我不确定。我可能会感到困惑，所以只需查看代码即可。

这是输入格式。

    cin >> count;
cin.ignore();

for(int i =0; i < count; i++){
    cout << "Enter the question.\n" << endl;
    //enter the question

    getline(cin, arr[i].question);
    cin.ignore();

    cout << "Enter the answer.\n" << endl;
    //enter the answer

    getline (cin, arr[i].answer);
    cin.ignore();

}

这是输出格式来测验你。

    for(int j =0; j < count; j++){
    cout << "\n" << arr[j].question << endl;
    getline(cin, userguess);

    if(arr[j].answer.compare(userguess) !=0){
        cout << "Wrong. Keep trying!\n";
        incorrect++;
        total++;
    }
    if(arr[j].answer.compare(userguess) ==0){
        cout << "Nice job. Keep it up!\n";
        correct++;
        total++;
    }

每当我提出问题时，它都不会在控制台中输出问题或者让我回答问题。它只是说错了。请帮助一点？

编辑：这是整个代码：

// final PROJECT.cpp : Defines the entry point for the console application.

#include <iostream>
#include <string>
#include <fstream>
#include <stdlib.h>
#include <cstring>
#include <cstdio>
#include <stdio.h>
#include <tchar.h>
#include <string.h>
#include <cstdlib>

using namespace std;

struct flashcards{
string question;
string answer;
}FC1, FC2, FC3, FC4, FC5, FC6, FC7, FC8, FC9, FC10, FC11, FC12, FC13, FC14, FC15, FC16, FC17, FC18, FC19, FC20;

int _tmain(int argc, _TCHAR* argv[])

{
system ("color 4B");
string userguess;
string again;
flashcards arr[10000];
int count;
float correct=0;
float incorrect=0;
float total=0;
//one major problem, wont accept spaces.
cout<< "Flash Card Runner\n";
cout<< "This program was made by Jacob Malcy\n";
cout<< "Beta 3.8\n";
cout<< "IN ORDER FOR YOU TO HAVE MULTIPLE WORD FLASH CARDS,\n";
cout << "SKIP NUMBER ONE FLASHCARD QUESTION AND ANSWER!\n";
cout<< "This bug is currently being worked on.\n";
cout << "If you happen to have problems conntact Jacob.\n";
int choice;


cout<< "Would you like to create or test? Enter 0 for create and 1 for test.\n";
cin >> choice;
if(choice==0){
    //Creating new deck of cards
cout<< "How many flashcards do you want?\n";
cin >> count;
cin.clear();

for(int i =0; i < count; i++){
    cout << "Enter the question.\n" << endl;
    //enter the question

    getline(cin, arr[i].question);
    cin.ignore();

    cout << "Enter the answer.\n" << endl;
    //enter the answer

    getline (cin, arr[i].answer);
    cin.ignore();

}
}
else if(choice==1){
    //Reading in new file
    cout << "Reading file...\n";

    string line;
    ifstream myfile ("Save.txt");
    if (myfile.is_open())
    {
        count = 0;

        while ( myfile.good () )
        {
            getline (myfile,line);
            arr[count].question = line;
            cout << line << endl;

        getline (myfile,line);
        arr[count].answer = line;
        cout << line << endl;
        count++;

        }

        myfile.close();
    }

    else cout << "Unable to open the file";
}

do
{

for(int j =0; j < count; j++){
    cout << "\n" << arr[j].question << endl;
    getline(cin, userguess);

    if(arr[j].answer.compare(userguess) !=0){
        cout << "Wrong. Keep trying!\n";
        incorrect++;
        total++;
    }
    if(arr[j].answer.compare(userguess) ==0){
        cout << "Nice job. Keep it up!\n";
        correct++;
        total++;
    }


}
cout<< "The number of correct questions answered was: \n" << correct << endl;
cout<<"The number of total questions answered was: " << total <<"\n";
    cout<< "The number of incorrect questions answered was: \n" << incorrect << endl;
    //cout<< total;
    float percent = (correct/total)*100;
    cout<< "The total percent you got right is: \n" << percent << "% correct" << endl;
    system("pause");
    cout << "Would you like to run the quiz again?\n"
    << "Type y or Y to run this again. If not, enter any other letter.\n";
    cin >> again;
    if((again == "y") || (again == "Y")){
    correct=0;
    incorrect=0;
    total=0;
    }

}while((again == "y") || (again == "Y"));

ofstream myfile ("Save.txt");
if (myfile.is_open())
{

    for(int i =0; i <count; i++){

        myfile << arr[i].question << "\n";
        myfile << arr[i].answer << "\n";
    }
    myfile.close();

    }
else cout << "Unable to save file";

cout << "Your finished with the quiz. Goodbye!\n";

system("PAUSE");
return 0;
}

当我运行它时，它会像这样出现

    Flash Card Runner
This program was made by Jacob Malcy
Beta 3.8
IN ORDER FOR YOU TO HAVE MULTIPLE WORD FLASH CARDS,
SKIP NUMBER ONE FLASH CARD QUESTION AND ANSWER!
This is a bug is currently being worked on.
if you happen to have problems, conntact Jacob.
Would you like to create or test? Enter 0 for create and 1 for test.

如果我输入零：

How many flashcards do you want?

说我输入两个2

Enter the question.

Hi ho
Enter the answer.

Merry oh

enter the question.

fi fa
enter the answer.

fo fum

然后它跳到：

Wrong. Keep trying!

erry oh

错误之前，它应该显示第一个问题，并给我机会回答。它在我能说之前就说错了。然后它会显示缺少第一个字符的答案。你去吧。

Answer 1

我假设您在ignore之后立即调用getline来删除尾随的换行符。

不要那样做。 std::getline已经从流中提取换行符（并将其丢弃），因此您忽略了下一行的第一个字符。

getline跳过第一个输入字符c ++

1 个答案: