Question

Write a function that returns the number of digits in an integer using the following header:

int getSize(int n)

For example, getSize(45) returns 2, getSize(3434) returns 4, getSize(4) returns 1, and getSize(0) returns 1.

Write a test program that prompts the user to enter an integer and displays its size.

Answer 1

#include <stdio.h>

int getSize(int n) {
    if (n < 10)
        return 1;
    else
        return 1 + getSize(n/10);
}

int main() {
    int n;
    printf("Enter a value for n: ");
    scanf("%d", &n);
    printf("Size of %d is %d\n", n, getSize(n));
    return 0;
}