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Algorithm or program in basic c language to print the reverse of a number...please help?

5 Answers

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  • 8 years ago
    Favorite Answer

    satish's answer is incorrect as it always outputs a 0 as the last digit instead off the first digit of the original number. For example, take 12345, the algorithm he/she has proposed will output 54320.

    A quicker (shorter) approach would be to use the modulus.

    1. We take the number's remainder when divided by 10 by using "remainder = number % 10" - without quotes.

    2. We divide the original number by 10.

    3. Print the remainder out.

    4. If number is zero, then terminate, otherwise, go to step 1.

    void printReverseOfNumber(int number)

    {

        int remainder;

        while(number != 0)

        {

            remainder = number % 10;

            number /= 10;

            printf("%d", remainder);

        }

    }

    int main(int argc, char* argv[])

    {

        printReverseOfNumber(12345); // outputs 54321

        return 0;

    }

  • 5 years ago

    1

    Source(s): Reverse Phone Number Lookup - http://phonesearchgo.oruty.com/?MAV
  • Anonymous
    4 years ago

    2

    Source(s): Reverse Cell Check http://netint.info/ReversePhoneLookup
  • satish
    Lv 4
    8 years ago

    let us say the number is 12345

    first you divide the number with 10

    you get 1234 now multipluy this with 10 '

    you get 12340 subtract this from 12345 you get 5 which is the last number.

    now repeat the same with

    1234 this time divide with 10

    123 multiply witn 10 1230

    subtract

    1234-1230 = 4

    we do this till the quoitiet is 0

    int printrev(int number)

    {

    int temp;

    while(1)

    {

    int temp = (number/10)*10;

    if (temp ==0)

    {

    printf("%d",temp);

    break;

    }

    temp = number -temp;

    printf("%d\t",temp);'

    number = number/10;

    }

    }

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  • 4 years ago

    3

    Source(s): Phone Records Database http://reversephonenumberlookup.enle.info/?7666
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