C programming - do while loop help (code almost done)

Question

I have created a code that writes out the sum of all even numbers. But every time it loops the sum of the last run is saved and added in the sum of the new run. how do i make it have a new loop?

sorry for my bad english, and thx in advance

 int main()
    {


    int number = 0;
    int sum = 0;
    printf("Welcome to\"Sum Evens\"!");

    do
    {
        printf("\ninput a number: ");
        scanf(" %d", &number);
        if (number == 0)
        {
            printf("Goodbye, have a nice day!\n");
            break;
        }
        printf("\nSum:");

        if (number % 2 != 0)
        {
            number -= 1;
        }

        for (int i = 0; i <= number; i += 2)
        {

            printf(" %d ", i);
            if (i != number)
            {
                printf("+");
            }
            sum += i;

        }
        printf("= %d\n", sum);

    } while (number != 0);

    system("pause");
        return 0;
    }

Try moving the definition of the variable sum into the loop. — Some programmer dude
– Some programmer dude, Commented Sep 22, 2016 at 16:13

user6300394 · Accepted Answer · 2016-09-22 16:18:49Z

3

Watch these sort of problems melt away if you declare your variables as close to their first use as possible.

In your case, move int sum = 0; to just before the for loop.

answered Sep 22, 2016 at 16:18

user6300394

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1 Comment

Nikolai Ruhe Over a year ago

Excellent advice.

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