copy contents of array to single value?

This is a discussion on copy contents of array to single value? within the C Programming forums, part of the General Programming Boards category; I have an array, lets call it buffer. buffer[0] = 9 buffer[1] = 2 buffer[2] = 3 how would i ...

  1. #1
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    copy contents of array to single value?

    I have an array, lets call it buffer.

    buffer[0] = 9
    buffer[1] = 2
    buffer[2] = 3

    how would i get a variable, x, to equal 923 (not only those numbers, but the contents of the buffer, whatever they may be)

  2. #2
    Devil's Advocate SlyMaelstrom's Avatar
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    Well you could start from the back of the array and as you go backwards through it summing, just create a multiple that gets 10 times bigger everytime you decrement the index.

    Code:
    int x;
    int sum = 0;
    int multiple = 1;
    for (x = 2; x > 0; x--) {
       sum += buffer[x] * multiple;
       mutiple *= 10;
       }
    Another way would be to use the itoa() function on each one and strcat() the values together and atoi() that value.

    Either way, I'm sure there is a better way. I wouldn't be suprised if one of the wiseasses in here came in with a STL function that does just what you're asking.
    Last edited by SlyMaelstrom; 12-02-2005 at 06:32 PM.
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  3. #3
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    Quote Originally Posted by SlyMaelstrom
    I wouldn't be suprised if one of the wiseasses in here came in with a STL function that does just what you're asking.
    I would be. STL and C don't mix.
    If I did your homework for you, then you might pass your class without learning how to write a program like this. Then you might graduate and get your degree without learning how to write a program like this. You might become a professional programmer without knowing how to write a program like this. Someday you might work on a project with me without knowing how to write a program like this. Then I would have to do you serious bodily harm. - Jack Klein

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    i went with the atoi...thanks for the help

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