How can I calculate the tens place value of 2^100 in C++?
I tried this;
#include <cmath>
#include <iostream>
using namespace std;
int main(){
int answer;
answer=(unsigned long long int)pow(2, 100)%100/10;//zero
cout<<answer<<endl;
return 0;
}
But it printed 0 because of overflow.
Python prints the answer correctly with this code;
print(2**100%100//10)
But how do I calculate it in C++?
>Solution :
You have a problem with typecasting.
As you can see from documentation std::pow return double
So first step to solve our problem, try to remove type casting.
std::pow(2, 100); // return 1.26765e+30
The next problem we can’t use operator% with double type so we need std::fmod
So final solution would look like this:
int answer= std::fmod(std::pow(2, 100), 100) / 10;