whats wrong withthis prog.?

This is a discussion on whats wrong withthis prog.? within the C++ Programming forums, part of the General Programming Boards category; Hi, I've been haveing this really annoying problem...whenever I use 'cin' in my programs it keeps telling me 'phrase error ...

  1. #1
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    Unhappy whats wrong withthis prog.?

    Hi, I've been haveing this really annoying problem...whenever I use 'cin' in my programs it keeps telling me 'phrase error before '<'...I went over it and made sure I declared all my variables and added all the ';' where they needed to be, but still no luck
    think before you code...

  2. #2
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    heres the code:

    Code:
    #include <iostream.h>
    
    int main()
    {
    
    cout<<"  .oooooo.         .o.       ooooo          .oooooo.   ooooo     ooo /n";
    cout<<" d8P'  `Y8b       .888.      `888'         d8P'  `Y8b  `888'     `8' /n";
    cout<<"888              .8888.      888         888           888       8   /n";
    cout<<"888             .8' `888.     888         888           888       8 /n ";
    cout<<"888            .88ooo8888.    888         888           888       8 /n ";
    cout<<"`88b    ooo   .8'     `888.   888       o `88b    ooo   `88.    .8' /n ";
    cout<< "`Y8bood8P'  o88o     o8888o o888ooooood8  `Y8bood8P'     `YbodP'   /n";
    cout<<"                                                                    /n";
    cout<<"          ( |      (  ___  ) |__   __|( ___   (  ____ ) "<<endl;
    cout<<"          | (      | (   ) |   ) (   | (   ) || (    )| "<<endl;
    cout<<"          | |      | (___) |   | |   | |   | || (____)| "<<endl;
    cout<<"          | |      |  ___  |   | |   | |   | ||     __) "<<endl;
    cout<<"          | |      | (   ) |   | |   | |   | || ( | (    "<<endl;
    cout<<"          | (______| )   ( |   | |   | (___) || ) | (__ "<<endl;
    cout<<"          (_______/|)     (|   )_(   (_______)|/   (___) "<<endl;
    //^about ascii art was provided by at http://www.network-science.de/ascii
    //provided I had to make a few ajustments to the ascii so my compiler would accept it...
    
    int num1,opera,num2;
    
    cout<<"Welcome to K's calculator"<<endl;
    cout<<" * (shift + 8) = multiply";
    cout<<"Input order is: 'number-operation-number' NO SPACES"<<endl;
    
    cin>>"input:" num1 >> opera >> num2;
    
    switch (opera)
    {
    case '+': cout << num1 <<'+' << num2 << '=' << (num1+num2);
         break;
    
    case '-': cout << num1 <<'-' << num2 << '=' <<(num1-num2);
         break;
    
    case '*': cout << num1 <<'*' << num2 << '=' <<(num1*num2);
         break;
    
    case '/': cout << num1 <<'/' << num2 << '/' << (num1/num2);
    
         default: cout << opera <<":ERROR (@_@)" <<endl;
     }
          return 0;
    }
    think before you code...

  3. #3
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    Code:
    	cin>>num1 >> opera >> num2;

  4. #4
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    somehow i tried that before and it didn't work, now i tried it again and it did....
    think before you code...

  5. #5
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    since num1 is a variable you need to put a >> in front


    Oh and when you run your program the graphics get messed up.
    "When I die I want to pass peacefully in my sleep like my grandfather did, not screaming and yelling like the passengers in his car."

  6. #6
    Registered User slaveofthenet's Avatar
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    The only way the input will get passed to the respective variables is if the user seperates the numbers and operator with a space, ie "1 + 1". An input such as "1+1" will deliver undesired results.
    Detailed understanding of language features - even of all features of a language - cannot compensate for lack of an overall view of the language and the fundamental techniques for using it. - Bjarne Stroustrup

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