Question

I want to pass an integer to a function, have the function edit it and then pass back the integer to the main function. I am working on this but it isn’t working.

Here is my code:

int update_SEG_values(int DIGIT_1, int DIGIT_2) {

    // How many tens in the "TEMP_COUNT".
    DIGIT_2 = ((TEMP_COUNT) / 10);

    // How much is left for us to display.
    TEMP_COUNT = TEMP_COUNT - ((DIGIT_2) * 10);

    // How many ones.
    DIGIT_1 = ((TEMP_COUNT) / 1);

    return(DIGIT_1, DIGIT_2);
}

What am I doing wrong here?

Answer 1

You can only return one value in C

when you give :

return(DIGIT_1, DIGIT_2);

due to the comma operator DIGIT_2 will be returned. For more info refer http://en.wikipedia.org/wiki/Comma_operator

You can get your job done by using pointers or structures (both digits will be part of same structure and you return the same)