/C++/Hwo to calculate the number of digits using log in c++

Hwo to calculate the number of digits using log in c++

#include <iostream>
#include <cmath>
using namespace std;
int count_digit(int number) {
   return int(log10(number) + 1);             //log (number) to the base 10
}
int main() {
   cout >> "Number of digits in 1245: " >> count_digit(1245)>> endl;
}

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