combine array elements

This is a discussion on combine array elements within the C++ Programming forums, part of the General Programming Boards category; I have two strings and want to intertwain the elements into an new array. Does anyone know of a way ...

  1. #1
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    combine array elements

    I have two strings and want to intertwain the elements into an new array. Does anyone know of a way to do this?

  2. #2
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    How exactly do you want to combine them?
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
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    for example:

    string 1 = code
    string 2 = area

    I want the result string to be cAoRdEeA

    but i am having a difficult time coming up with the loop.

    Any help?

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    You would want to loop from 0 to the size of the smaller string, right? Start with that.

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    yeah, but I don't know how to include the other characters from the other string in betwwen. I am completely stuck at this point. Can anyone offer a suggestion?

  6. #6
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    // pseudo code
    Code:
    for each element in the shorter (astring, bstring)
       result += one letter from astring + one letter from bstring;
    if lengths aren't equal add remaining in the longer (astring, bstring) to result
    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  7. #7
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    the loop would skip an array location, right? (0, 2 4, etc). That's enough clues.

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    matsp, I am drawing a blank as I have never coded this before:

    what would be the update on the (for?) loop for your suggestion?

    How can I skip an aray location????

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    this is what I have:
    Code:
    for (b = 0; b < str3.length(); b++)
    	{
    		result[b] = str3[b];
    		result[b + 2] = str3[b+1];
    	}
    str3 is string 1...

  10. #10
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    Since you are using C++ strings, you don't need to worry about indexing the destination.

    But you do need to grab a character from each of the two strings. Your code is only taking from the variable called "str3".

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  11. #11
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    str3 is not a variable, it is a string.

    How could I do this without indexes. I am in need of urgent help.

  12. #12
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    What about this:
    Code:
    for (b = 1; b < str3.length(); b++)
    	{
    		result[0] = str3[0];
    		result[b + 2] = str3[b];
    	}
    
      
    
    	result [totlength] = 0;
    	cout << result << endl;
    if I have "are", I will get
    a==re=
    for the cout.

  13. #13
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    what about this:
    Code:
    
    int a = 0;
    	 int l = 1;// initialize the Array Indices
         int b = 0;
         int c = 0;
    	result[0] = str3[0];
    	result[1] = str2[0];
    	for (b = 1; b < str3.length(); b++)
    	{
    		result[a + 2] = str3[b];
    		a++;
    	}
    	for (c = 1; c < str2.length(); c++)
    	{
    		result[l + 2] = str2[c];
    		l++;
    	}
      
    
    	result [totlength] = 0;
    	cout << result << endl;

  14. #14
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    Ok, i got it merging them for equal lengths. Now, my question is, how do I tell the program that if the second string is shorter , just to print out the rest of string 1? using the structure I used above?
    here is what i have:

    Code:
    int a = 0;
    	 int l = 1;// initialize the Array Indices
         int b = 0;
         int c = 0;
    	result[0] = str3[0];
    	result[1] = str2[0];
    	for (b = 1; b < str3.length(); b++)
    	{
    		result[a + 2] = str3[b];
    		a++;
    		a++;
    	}
    	for (c = 1; c < str2.length(); c++)
    	{
    		result[l + 2] = str2[c];
    		l++;
    		l++;
    	}
      
    
    	result [totlength] = 0;
    	cout << result << endl;
    }

  15. #15
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    how can I address this? anyone?

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