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Phone digits

#043BasicStringsConditions4 min

A friend's number came with dashes, spaces and brackets. Write count_digits(phone) to count only the characters from '0' to '9'; everything else is skipped. An empty string gives 0.

Examples

count_digits("138-0013-8000")→11

count_digits("")→0

The functionint count_digits(const char *phone)

main.c

int count_digits(const char *phone) {
    int n = 0;
    for (int i = 0; phone[i] != '\0'; i++) {
        // your code here: if it is between '0' and '9', add 1 to n
    }
    return n;
}

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Result

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