Question

Please help and follow instructions, c++ , let me know if there is any questions

Description:

• This program is part 1 of a larger program. Eventually, it will be a complete Flashcard game.
• For this part, the program will
  • Prompt the user for a file that contains the questions – use getline(cin, fname) instead of cin >> fname to read the file name from the user. This will keep you in sync with the user’s input for later in the program
    • The first line is the number of questions (just throw this line away this week)
    • The second line is question 1
    • The third line is answer 1
    • The fourth line is question 2
    • The fifth line is answer 2 and so on,
  • Read the first question/answer from the file
    • Note you can use getline(yourInputStream, yourString) to read an entire line
  • Prompt the user for the answer to the question
    • The prompt is the question from the file, followed by “? “
    • The user gets 3 tries to get it correct
    • Make an enum to remember whether the user is answering, correct, or incorrect
      • Initially the user is answering
      • If answered incorrectly 3 times, then the user is incorrect
      • If answered correctly, then the user is correct
    • Checking if the answer is correct includes some string manipulation
      • Take the line that the user entered, remove all leading whitespace, remove all trailing whitespace, and convert everything to lowercase
      • By doing this, you can simply compare the user’s answer to the correct answer with an ==
      • Note: isspace(c) returns true if c is a whitespace character like a space or tab, false otherwise
    • Use functions as appropriate – you should have more than just main()
    • Let flash.txt contain the following lines:

4
child
small fry
happy
tickled pink
mock
poke fun at
dough puncher
baker

Sample Run #1 (bold, underlined text is what the user types):

File? flash.txt

child? small fry
Yay

Sample Run #2 (bold, underlined text is what the user types):

File? flash.txt

child? small          fry

Try again
child? still don't know

Try again
child? definitely don't know

Sorry, it's small fry

Sample Run #3 (bold, underlined text is what the user types):

File? flash.txt

child?     small FRY     
Yay

Answer 1

#include <iostream>
#include <string>
#include <fstream>
#include <stdlib.h>

using namespace std;

///enum to store user state of answer
enum UserState {
answering=0,correct=1,incorrect=2
};

///class to store file question ans answer
class QuestionAnswer{
string* questionList; ///list of questions in file
string* answerList; ///list of answers relative to questionlist
int total; /// total no of questions in file
int current; /// used for initialize
public:
QuestionAnswer(){
current=0;
}
///constructor
QuestionAnswer(int tot){
current=0; ///sset curr to 0
total=tot; ///initialze totla to tot
questionList=new string[tot]; ///allocate memory spaces for tot no of Questions
answerList=new string[tot]; ///allocate memory spaces for tot no of Answers
}
/// fun to add Q and A in the questionList and answerList
void setQuestion(string Q,string A){
questionList[current]=Q;
answerList[current]=A;
current++; /// increment current
}
int getTotal(){
return total;
}
///to display All Q=> A
void displayQA(){
for(int i=0;i<total;i++){
cout<<"\nQ."<<i+1<<" "<<questionList[i]<<endl;
cout<<"A."<<i+1<<" "<<answerList[i]<<endl;
}
}
///returns the Q at postion index
string getQuestion(int index){
return questionList[index];
}
///returns the answer of Q at postion index
string getAnswer(int index){
return answerList[index];
}
};

///to read File
///returs NULL if file error
///else return QuestionAnswer* storing all Q=>A
QuestionAnswer* readFile(string fname,QuestionAnswer* QA){
fstream fin;
fin.open(fname.c_str()); ///open file in read mode /// c_str() convert string to const char*
if(!fin){ ///if error
cout<<"\nFailed to open file ";
return NULL;
}
///read file line by line

string line;
string question,answer;
if(!fin.eof()){
getline(fin,line); ///first line is total question present in file
int tot=atoi(line.c_str()); ///convert char* to int

QA=new QuestionAnswer(tot); ///call constructor of QA to allocate memory
///loop through tot no of question
for(int i=0;i<tot && fin.eof()==false;i++){
getline(fin,question); /// get Qusetion
getline(fin,answer); ///get Answer
QA->setQuestion(question,answer); ///store in QA

}
}
fin.close(); ///close file
return QA; ///after success return QA
}

///function to remove preceding and trailing unnecessary spaces
/// if input= hello bye
///output =hello bye
///NOTE -> not removes spaces between words
string removeSpace(string input){
string ans=""; //to store ans string
int i;
/// for all chars in input string
for(i=0;i<input.size() ;i++){
if(input[i]==' ') ///if space then continue
continue;

///found first letter so break
break;
}
///flag check if it is last letter
bool flag=true;
for(;i<input.size();i++){ /// iterate
///check if it is space
if(input[i]==' '){
flag=false;
///check if there is any other letter after this space
for(int j=i+1;j<input.size();j++){
if(input[j]!=' '){ ///if NOT space => letter
flag=true; /// there is any other letter after this space
break;
}

}
}
if(flag) /// space is not trailing one
ans=ans+input[i];
else ///means there is no letter after this space ==>this is trailing space
return ans;
}
return ans;
}

///fun to ask question to user one by one
///ask Q, get answer from user then compare if result is true then ask next question else exits
void askQuestion(QuestionAnswer *QA,UserState state=answering){
///asks question one by one
for(int i=0;i<QA->getTotal();i++){

string Q=QA->getQuestion(i);
string A=QA->getAnswer(i);
string userAnswer="";

int attempt=1;
while(state==answering)
{
cout<<endl<<Q<<"? ";
getline(cin,userAnswer);
///cout<<"\nUR ans =*"<<userAnswer<<"*";
///remove leading white spaces and trailing white spaces
userAnswer=removeSpace(userAnswer);
///Now compare the userAns to actual ans
if (userAnswer == A){ ///answer matches
cout<<"\nYay ";
state=correct;
}
else{ ///answer is wrong
///check attempt
if(attempt >=3){ ///attempt was last
state=incorrect;
cout<<"\nSorry ,its "<<A;
break;
}
else{ ///attempt is ,second or third
cout<<"\nTry Again ";
}
}
attempt++; ///increment attempt
} ///end while
if(state==incorrect) ///question wrong for 3 times
return;
state=answering;
} ///end for

}

int main()
{

UserState state;
//Prompt the user for a file that contains the questions
QuestionAnswer* QA;
string fname;
cout<<"\nFile ? ";
getline(cin,fname);

QA=readFile(fname,QA);
if(QA==NULL){
return 0;
}
//QA->displayQA();
askQuestion(QA,state=answering);
return 0;
}

--------------------------

input.txt

4
child
small fry
happy
tickled pink
mock
poke fun at
dough puncher
baker

------------------------

I C:\Users\owner\Desktop\PERSISTENT\TEST\Practice\FlashCard\bin\Debug\Flash Card.exe -ox File ? input.txt child? small fry Try Again child? small fry Try Again child? small fry Yay happy? tickeld pink Try Again happy? tickeled pink Try Again happy? tickled pink Yay mock? poke fun at Try Again mock? poke fun at Yay dough puncher? abc Try Again dough puncher? a b c Try Again dough puncher? b cd Sorry ,its baker Process returned © (@xo) Press any key to continue. execution time : 125.386 s Activate Windows Go to Settings to activate Windows. Type here to search AND ENG 9:41 PM 12/10/2019