C++ Beginner Help

This is a discussion on C++ Beginner Help within the C++ Programming forums, part of the General Programming Boards category; I'd like to start by letting everyone know that I've been programming (or trying, at least) for only a couple ...

  1. #1
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    Question C++ Beginner Help

    I'd like to start by letting everyone know that I've been programming (or trying, at least) for only a couple weeks, therefore I know very little about vocabulary so please provide a definition for programming-specific words. I am currently reading the Beginner Tutorial guide on this website, also a few C++ books.

    Alright, I only made it to the second section, If Statements, and I'm trying to make a quiz-like program. So here is my code:

    Code:
    #include <iostream>
    using namespace std;
    int main()
    {
        char A, B, C, D;
        
        cout<<"What year was WWII thought to be started? ";
        cout<<"A. 1931";
        cout<<"B. 1945";
        cout<<"C. 1939";
        cout<<"D. 1967";
        
        char>> A;
        char>> B;
        char>> C;
        char>> D;
        cin.ignore();
        
        if (int = A){
                 cout<<"1931 is incorrect. C was the right answer.";
                 }
        if (int = B){
                 cout<<"1945 is incorrect. C was the right answer.";
                 }
        if (int = C){
                 cout<<"1939 is correct. Good job!";
                 }
        if (int = D){
                 cout<<"1967 is incorrect. C was the right answer.";
                 }
        cin.get();
    }
    Can somebody tell me where I went wrong? Now I'm not asking anybody to do this for me, but just give me a few hints on where I messed up. For the record, I'm using Dev-C++ 4.9.9.2

  2. #2
    Registered User BuzzBuzz's Avatar
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    You're mixing chars and ints, and for the input you only need one char option:

    Code:
    char input;
        
        cout<<"What year was WWII thought to be started? ";
        cout<<"A. 1931";
        cout<<"B. 1945";
        cout<<"C. 1939";
        cout<<"D. 1967";
        
        cin >> input;
        
        if (input == 'A' || input == 'a'){
    Also, make sure that you use == when comparing two things. = on its own assigns the value on the right to the variable on the left. With the options you should use else if statements:
    Code:
    if (condition 1)
    {
    }
    else
    if (condition 2)
    {
    }
    else
    if (condition 3)
    {
    }
    else
    if (condition 4)
    {
    }
    else
    //code for none of the above...
    And use either << endl or "\n" to move to the next line in your output.
    Last edited by BuzzBuzz; 04-09-2009 at 06:59 PM.
    Any help I give may be classified as:
    The Blind leading the Blind...
    Currently working through:
    "C++ Primer Plus"

  3. #3
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    For this part:

    Code:
    if (input == 'A' || input == 'a'){
    Would I need to do this for every char I want to do? If so, it would look like this right?

    Code:
    if (input == 'A' || input == 'a'){
    //code
    else if (input == 'B' || input == 'b'){
    //code
    else if (input == 'C' || input == 'c'){
    //code
    else if (input == 'D' || input == 'd'){
    //code
    I got it I believe. One more question, how do you make these: "||"?

  4. #4
    Registered User BuzzBuzz's Avatar
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    Yes that's right. When working with specific characters you enclose them in ' '. Later on there are ways to convert input to lower or upper case, but for now checking for either does the job.

    || means OR as far as C++ is concerned. As for where | lives on your keyboard....that depends on where you are. Here in the UK the symbol is on the backslash key next to 'Z'. It looks like one of these : that's been squished on the keyboard rather than |.
    Any help I give may be classified as:
    The Blind leading the Blind...
    Currently working through:
    "C++ Primer Plus"

  5. #5
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    I found it |. Thanks for the help!

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