Need a code that counts the same digit in a number

Question

As title says , need a code that counts the same digit in a number..

For example:

If I put 54678, it shows me how many number 5 is used in that integer.

Answer 1

You could use a function like this, where n is the number and d is the digit you want to count:

int count_dig(int n, int d) {
    int result = 0;
    while (n > 0) {
        if (n % 10 == d) {
            result++;
        }
        n/=10;
    }
    return result;
}

Using this, you could print your formatted result like:

printf("%d -- You used digit %d %d times.", n, d, count_dig(n, d));