Question

How to check if the last digit of a number power the total digits equal to the number itself in C++

Answer 1

#include <iostream>
#include <cmath>

int last_digit_power_total_digits_equal_to(int num) {
    int last_digit = num % 10;
    int total_digits = (int)log10(num) + 1; 
    
    return pow(last_digit, total_digits) == num;
}

int main() {
    std::cout << last_digit_power_total_digits_equal_to(16807) << "\n";
    
    std::cout << last_digit_power_total_digits_equal_to(89016) << "\n";
    
    std::cout << last_digit_power_total_digits_equal_to(134217728) << "\n";
}




/*
run:

1
0
1

*/

 

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