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Create 2 parallel string arrays from text file using getline

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0

For this task, I am opening a text file and trying to read lines 1 and 3 into the array named front (at indices 0 and 1 respectively), and then read lines 2 and 4 into the array named back (at indices 0 and 1 respectively), but it's not quite doing it. Nothing is getting inputted into the arrays, my loop logic must be off. I want to read each line as is (with spaces included) up until the newline character. Any help is appreciated.

void initialize(string front[], string back[], ifstream &inFile)

 string fileName = "DevDeck.txt"; //Filename
 string line;
 inFile.open(fileName); //Open filename

 if (!inFile)
 
 cout << "Couldn't open the file" << endl;
 exit(1);
 

 //Create the parallel arrays
 while (!inFile.eof()) 
 
 for (int index = 0; index < 4; index++)
 
 getline(inFile, line); 
 front[index] = line; //Store in first array

 getline(inFile, line); 
 back[index] = line; //Store in second array
 
 

c++ arrays loops file-io istream

share|improve this question

asked Mar 8 at 5:35

CornelCornel

42127

add a comment | 

0

For this task, I am opening a text file and trying to read lines 1 and 3 into the array named front (at indices 0 and 1 respectively), and then read lines 2 and 4 into the array named back (at indices 0 and 1 respectively), but it's not quite doing it. Nothing is getting inputted into the arrays, my loop logic must be off. I want to read each line as is (with spaces included) up until the newline character. Any help is appreciated.

void initialize(string front[], string back[], ifstream &inFile)

 string fileName = "DevDeck.txt"; //Filename
 string line;
 inFile.open(fileName); //Open filename

 if (!inFile)
 
 cout << "Couldn't open the file" << endl;
 exit(1);
 

 //Create the parallel arrays
 while (!inFile.eof()) 
 
 for (int index = 0; index < 4; index++)
 
 getline(inFile, line); 
 front[index] = line; //Store in first array

 getline(inFile, line); 
 back[index] = line; //Store in second array
 
 

c++ arrays loops file-io istream

share|improve this question

asked Mar 8 at 5:35

CornelCornel

42127

add a comment | 

For this task, I am opening a text file and trying to read lines 1 and 3 into the array named front (at indices 0 and 1 respectively), and then read lines 2 and 4 into the array named back (at indices 0 and 1 respectively), but it's not quite doing it. Nothing is getting inputted into the arrays, my loop logic must be off. I want to read each line as is (with spaces included) up until the newline character. Any help is appreciated.

void initialize(string front[], string back[], ifstream &inFile)

 string fileName = "DevDeck.txt"; //Filename
 string line;
 inFile.open(fileName); //Open filename

 if (!inFile)
 
 cout << "Couldn't open the file" << endl;
 exit(1);
 

 //Create the parallel arrays
 while (!inFile.eof()) 
 
 for (int index = 0; index < 4; index++)
 
 getline(inFile, line); 
 front[index] = line; //Store in first array

 getline(inFile, line); 
 back[index] = line; //Store in second array
 
 

c++ arrays loops file-io istream

share|improve this question

asked Mar 8 at 5:35

CornelCornel

42127

void initialize(string front[], string back[], ifstream &inFile)

 string fileName = "DevDeck.txt"; //Filename
 string line;
 inFile.open(fileName); //Open filename

 if (!inFile)
 
 cout << "Couldn't open the file" << endl;
 exit(1);
 

 //Create the parallel arrays
 while (!inFile.eof()) 
 
 for (int index = 0; index < 4; index++)
 
 getline(inFile, line); 
 front[index] = line; //Store in first array

 getline(inFile, line); 
 back[index] = line; //Store in second array
 
 

share|improve this question

asked Mar 8 at 5:35

CornelCornel

42127

share|improve this question

asked Mar 8 at 5:35

CornelCornel

42127

asked Mar 8 at 5:35

CornelCornel

42127

asked Mar 8 at 5:35

CornelCornel

42127

1 Answer
1

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oldest

votes

1

Your loop for (int index = 0; index < 4; index++) has the wrong condition since you want 4 strings in total but in each loop you get 2 so right now you would get 8 strings.

I tried to run your code with that change like this:

int main()

 string front[2];
 string back[2];

 ifstream inFile;

 initialize(front, back, inFile);

 cout << front[0] << endl << back[0] << endl << front[1] << endl << back[1];

 return 0;

and it worked perfectly for me. It displayed:

line1
line2
line3
line4

In order to help you further you should provide the DevDeck.txt file and the piece of code that calls this function.

share|improve this answer

answered Mar 8 at 6:06

TwoOfDiamondsTwoOfDiamonds

1619

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. It looks like the array sizes were off. //Global constant const int NUMCARDS = 2; /inside main string front[NUMCARDS]; string back[NUMCARDS]; ifstream infile; Works great now. Ty.
  
  – Cornel
  Mar 8 at 6:10
  
  

  
  
  
  

add a comment | 

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1

Your loop for (int index = 0; index < 4; index++) has the wrong condition since you want 4 strings in total but in each loop you get 2 so right now you would get 8 strings.

I tried to run your code with that change like this:

int main()

 string front[2];
 string back[2];

 ifstream inFile;

 initialize(front, back, inFile);

 cout << front[0] << endl << back[0] << endl << front[1] << endl << back[1];

 return 0;

and it worked perfectly for me. It displayed:

line1
line2
line3
line4

In order to help you further you should provide the DevDeck.txt file and the piece of code that calls this function.

share|improve this answer

answered Mar 8 at 6:06

TwoOfDiamondsTwoOfDiamonds

1619

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. It looks like the array sizes were off. //Global constant const int NUMCARDS = 2; /inside main string front[NUMCARDS]; string back[NUMCARDS]; ifstream infile; Works great now. Ty.
  
  – Cornel
  Mar 8 at 6:10
  
  

  
  
  
  

add a comment | 

1

Your loop for (int index = 0; index < 4; index++) has the wrong condition since you want 4 strings in total but in each loop you get 2 so right now you would get 8 strings.

I tried to run your code with that change like this:

int main()

 string front[2];
 string back[2];

 ifstream inFile;

 initialize(front, back, inFile);

 cout << front[0] << endl << back[0] << endl << front[1] << endl << back[1];

 return 0;

and it worked perfectly for me. It displayed:

line1
line2
line3
line4

In order to help you further you should provide the DevDeck.txt file and the piece of code that calls this function.

share|improve this answer

answered Mar 8 at 6:06

TwoOfDiamondsTwoOfDiamonds

1619

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. It looks like the array sizes were off. //Global constant const int NUMCARDS = 2; /inside main string front[NUMCARDS]; string back[NUMCARDS]; ifstream infile; Works great now. Ty.
  
  – Cornel
  Mar 8 at 6:10
  
  

  
  
  
  

add a comment | 

Your loop for (int index = 0; index < 4; index++) has the wrong condition since you want 4 strings in total but in each loop you get 2 so right now you would get 8 strings.

I tried to run your code with that change like this:

int main()

 string front[2];
 string back[2];

 ifstream inFile;

 initialize(front, back, inFile);

 cout << front[0] << endl << back[0] << endl << front[1] << endl << back[1];

 return 0;

and it worked perfectly for me. It displayed:

line1
line2
line3
line4

In order to help you further you should provide the DevDeck.txt file and the piece of code that calls this function.

share|improve this answer

answered Mar 8 at 6:06

TwoOfDiamondsTwoOfDiamonds

1619

int main()

 string front[2];
 string back[2];

 ifstream inFile;

 initialize(front, back, inFile);

 cout << front[0] << endl << back[0] << endl << front[1] << endl << back[1];

 return 0;

line1
line2
line3
line4

share|improve this answer

answered Mar 8 at 6:06

TwoOfDiamondsTwoOfDiamonds

1619

answered Mar 8 at 6:06

TwoOfDiamondsTwoOfDiamonds

1619

answered Mar 8 at 6:06

TwoOfDiamondsTwoOfDiamonds

1619