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adding a char to aan array of chars

 
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adding a char to aan array of chars
sergec
13 May, 2007 - 10:47 PM
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Hi everybody

I am trying to make a little game of words: the user [child] gets a certain word, he/she has to add a letter to this word to create another word.

lets say i have this word

char word[4] = "Hell";

The user will type 'o' and he/she will get:
char new_word[5] = "Hello".

I cannot figure how to add a letter to this array.

Thank you for your help

Serge
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Xing
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 12:27 AM
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You can make use of strcat() or simply assigning to the fifth position.
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sergec
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 02:26 AM
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QUOTE(Xing @ 14 May, 2007 - 01:27 AM) *

You can make use of strcat() or simply assigning to the fifth position.



If I use strcat() I get: "Invalid conversion from 'char' to 'const char *'.
And the second solution I already tried does not fit...: it does not work

Serge
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Amadeus
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 04:19 AM
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g++ -o drink whiskey.cpp
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You'll have to add the required amount of elements (or memory) to the previously declared array.

Will it always be one additional letter? If so, you can simply declare an array large enough for your use originally, but if the amount of letters to be added may vary, you're better to re-size the array.

Are you using C or C++?
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sergec
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 05:02 AM
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QUOTE(Amadeus @ 14 May, 2007 - 05:19 AM) *

You'll have to add the required amount of elements (or memory) to the previously declared array.

Will it always be one additional letter? If so, you can simply declare an array large enough for your use originally, but if the amount of letters to be added may vary, you're better to re-size the array.

Are you using C or C++?



I am using C++ and just one letter will always be added in any case
The compiler always complains of invalid conversion, I am under Linux.

Serge
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Amadeus
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 07:32 AM
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g++ -o drink whiskey.cpp
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If you are using C++, why not use the string object instead of a character array?
CODE

string str1 = "Hell";
string str2="o";
string str3 = str1+str2;
cout<<str3;
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sergec
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 11:26 AM
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QUOTE(Amadeus @ 14 May, 2007 - 08:32 AM) *

If you are using C++, why not use the string object instead of a character array?
CODE

string str1 = "Hell";
string str2="o";
string str3 = str1+str2;
cout<<str3;




Hi Amadeus

I usually use strings instead but it did not match in what i wanted to do...
However finally I found this solution after a lot of thoughts and tries...:

CODE

char wholeword[7];
char word[] = "Hello";
char letter = 's';
for(int x = 0; x < 5; x++)
    {
    wholeword[x] = word[x]; //5 letters of word
    }

wholeword[5] = letter;
wholeword[6] = word[5]; //NULL

cout << wholeword;
/

Serge
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Pontus
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 11:48 AM
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If u want to do it whit char arrays do it like this:
CODE
char addchar='o';
char phrase[300]="hell";
int size;
for(int a = 0; a < 300;a++){//this loop is to determine the size
if(phrase[a]=='\0'){
size=a;
break;
}
}
phrase[size++]=addchar;//here is the code to put a char at the end
}
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Amadeus
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 12:02 PM
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g++ -o drink whiskey.cpp
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That is a lot of wasted memory.
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Pontus
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 12:04 PM
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QUOTE(Amadeus @ 14 May, 2007 - 01:02 PM) *

That is a lot of wasted memory.

What do you mean?
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Amadeus
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 12:05 PM
Post #11

g++ -o drink whiskey.cpp
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I mean that you have declared an array of 300 elements, of which you use 5 or six. the rest of the memory has been set aside in the application, but will not be used.
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Pontus
RE: Adding A Char To Aan Array Of Chars
14 May, 2007 - 12:17 PM
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i dont work alot with char arrays, so i dont know how to do it the best.

This post has been edited by manhaeve5: 14 May, 2007 - 12:17 PM
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