problems with array

This is a discussion on problems with array within the C++ Programming forums, part of the General Programming Boards category; ok i'm storing the first name in one array and the last name in a second array. i then add ...

  1. #1
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    problems with array

    ok i'm storing the first name in one array and the last name in a second array.
    i then add the two arrays (strcat) to get the full name.
    It works fine.
    But then, i have a function that recalls the main function.
    But when i call it back, it doesn't give me the occasion to input the first name and goes directly to the input of the last name.
    Is it because i did not clear my first array in which I stored both arrays?

    here's some of the code:

    void yourname (char n4[150], char n5[150]) {
    cout << "What is your first name?" << endl;
    cin.getline (n4,150,'\n');
    cout << "And what is your last name?" << endl;
    cin.getline (n5,150,'\n');

    strcat (n4, " ");
    strcat (n4, n5);
    cerr << "Hi " << n4 << "!" << endl;
    cout << endl;
    cout << endl;
    _sleep(1000);
    }

  2. #2
    Skunkmeister Stoned_Coder's Avatar
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    not enough code to see problem but you could try adding this line before the first getline()

    cin.ignore(80,'\n');

    that may or may not fix the problem.You have crap in the input buffer that needs clearing. probably just a newline char. do u do any cin>> before calling this func? also watch those arrays for overflow!
    Free the weed!! Class B to class C is not good enough!!
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  3. #3
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    This solved the problem for when I call back the function but now the first time i run the program it ignores the first input i enter and asks for another.

    Can you tell me what's the command to clear an array, not delete it?

  4. #4
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    >This solved the problem for when I call back the function but now the first time i run the program it ignores the first input i enter and asks for another.

    Then you'll have to move the cin.ignore() to the source of the problem - the input that's leaving a '\n' in the buffer.

    >Can you tell me what's the command to clear an array, not delete it?

    You could use memset (in cstring) or loop through manually, setting each element to zero.

  5. #5
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    Problem solved but i don't understand

    Ok i moved the cin.ignore to where i thought the problem originated from and it was in my doAgain function (function that asks if the user wants to try the program again and calls the main function again)
    I place the ignore right before it called the main function again. But I don't understand how the '/n' remains in the buffer.
    I figure that it is the 'enter' that the user presses after the cin asking for yes or no but i don't understand why it stays.

    Plz keep in mind that I am a n00b in C++ programming. I've been at it for 3-4 days

  6. #6
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    >I figure that it is the 'enter' that the user presses after the cin asking for yes or no but i don't understand why it stays.

    I'm assuming you're using operator >> in doAgain(). This operator leaves the '\n' in the buffer. This wouldn't be a problem if you were using operator >> again for the next input as it will ignore it, but as cin.getline() doesn't you need to manually remove it.

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