Help for a newbie?

This is a discussion on Help for a newbie? within the C++ Programming forums, part of the General Programming Boards category; Hi guys. I am new to C++ programming, and i would like a bit of help. My compiler is saying ...

  1. #1
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    Oct 2012
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    Question Help for a newbie?

    Hi guys.
    I am new to C++ programming, and i would like a bit of help. My compiler is saying that "m" is 'not declared in this scope'in this code:

    Code:
     #include <iostream>#include <math.h>
    using namespace std;
    int main() {
    cout<<"you stand in a clearing in the forest, North of you is a house with an open letterbox in front of it and a locked gate beside said letterbox.  To the South and West are a mass of brambles.  To the East is a path through the trees.\n";
    cin.get();
    char a;
       {cin>>a;
       cin.ignore();
      if (a==m);{
       cout<< "yes";}
       cin.get();
    }
    }

    Where have i gone wrong?
    Last edited by cowleyj; 10-03-2012 at 01:44 PM.

  2. #2
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    Line 9 does a test "a==m" (I'm using double quotes simply to contain text). There is no variable named m anywhere, hence the compiler's complaint. If you want to compare a with the character 'm', the test needed is "a == 'm'" (note the single quotes around the m).

    Also note that, on line 9, you have a misplaced semi-colon. Because of that, even if you get the code to compile, the string "yes" will always be written to cout, regardless of results of the test.
    Right 98% of the time, and don't care about the other 3%.

  3. #3
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    Thank you very much. It is fixed now.

  4. #4
    C++まいる!Cをこわせ! Elysia's Avatar
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    You seriously need to learn how to format your code properly: IP Banned - GIDNetwork
    Also, there should be no semicolon after the if statement.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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