letter to upper

This is a discussion on letter to upper within the C++ Programming forums, part of the General Programming Boards category; hi im trying to make it when the player types a letter it will be uppercase...it compiles and runs but ...

  1. #1
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    letter to upper

    hi im trying to make it when the player types a letter it will be uppercase...it compiles and runs but does not convert to uppercase... heres the code:

    Code:
    #include <iostream.h>
    #include <ctype.h>
    int main()
    {
    char letter;
    cout<<"Enter a letter : ";
    cin>>letter;
    letter=toupper(letter);
    std::cin.ignore();
    return 0;
    }

  2. #2
    C++ Witch laserlight's Avatar
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    hmm... why dont you print the letter and have a look?
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  3. #3
    The superhaterodyne twomers's Avatar
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    Ok, I think I see what you mean. But run this:

    Code:
    #include <iostream.h>
    #include <ctype.h>
    
    
    int main()
    {
    	char letter;
    	cout<<"Enter a letter : ";
    	cin>>letter;
    
    	letter=toupper(letter);
    
    	cout<< letter;
    
    	return 0;
    }
    I think what you want is this:
    Code:
    #include <iostream.h>
    #include <conio.h>
    #include <ctype.h>
    
    
    int main()
    {
    	char letter;
    	cout<<"Enter a letter : ";
    	letter = getch();		// The user doesn't have to press enter
    
    	letter=toupper(letter);	
    
    	cout<< letter;
    
    	return 0;
    }
    Conio.h is not standard, so this may/maynot work, it does for me tho

    Also, you can do this on a loop easily enough. Just make a string, and in a loop say StringName[i] += letter. You'll have to do something about backspaces I think, so the best way to do this is to read in a whole string at once, and then get a loop to 'toupper' it, if you get me.
    Last edited by twomers; 05-24-2006 at 02:24 AM.

  4. #4
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    doesnt work

    the first code printed the letter in lower case and the second code closed it when i press a letter

  5. #5
    The superhaterodyne twomers's Avatar
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    Quote Originally Posted by k1ll3r
    doesnt work
    What doesn't?

  6. #6
    C++ Witch laserlight's Avatar
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    doesnt work
    How does it not work? Also what exactly do you want to do? twomers caught on that you might have something else in mind, one that will need something non-standard like conio.
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  7. #7
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    the first code printed the letter in lower case and the second code closed it when i press a letter

  8. #8
    The superhaterodyne twomers's Avatar
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    Put in your

    std::cin.ignore();

    then

  9. #9
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    How does it not work? Also what exactly do you want to do?
    i just want the letter/s i type to appear in capital letter

  10. #10
    C++ Witch laserlight's Avatar
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    the first code printed the letter in lower case
    That should not happen.

    the second code closed it when i press a letter
    Run the program from the command line, or add something like std::cin.ignore... have you tried a hello world program yet?
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  11. #11
    The superhaterodyne twomers's Avatar
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    do this so:

    Code:
    #include <iostream>
    #include <string>
    
    using namespace std;
    
    
    int main()
    {
    	string MyString;
    
    	cout<<"Enter a string of letters( no spaces!!): ";
    	cin >> MyString;
    
    	for ( int i=0; i<MyString.length(); i++ )	
    	{
    		MyString[i] = toupper( MyString[i] );
    	}
    
    	cout<< MyString;
    
    	return 0;
    }
    and put that ignore thing there if you want

  12. #12
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    Run the program from the command line, or add something like std::cin.ignore... have you tried a hello world program yet?
    i did try std::cin.ignore(); and i have tried a hello program
    Adding std::cin.ignore(); just makes the first letter i type invisible and then the next letters in lowercase.

  13. #13
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    do this so:


    Code:
    Code:
    #include <iostream>
    #include <string>
    
    using namespace std;
    
    
    int main()
    {
    	string MyString;
    
    	cout<<"Enter a letter : ";
    	cin >> MyString;
    
    	for ( int i=0; i<MyString.length(); i++ )	
    	{
    		MyString[i] = toupper( MyString[i] );
    	}
    
    	cout<< MyString;
    
    	return 0;
    }
    that once again is in lowercase

  14. #14
    The superhaterodyne twomers's Avatar
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    Not when I run it
    Last edited by twomers; 08-03-2006 at 03:24 PM.

  15. #15
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    maybe it has something to do with the compilers?i have no clue
    btw:im using dev tool c++

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