a huge integer power 3 power n

[Thomas Lover]

Hi !

I want to make this operation below with GMP ! And I have been trying for 10 days now without any success. So, I need help!

The user enters an integer called “n”. Then I need to have a number which is 3 power n.

Then I have to power a huge integer that has 1000 digits with 3^n.

Here is my actual program and my compiling code line: g++ -o mills1 mills1.cpp -lgmp -lgmpxx -std=c++11 

I just don’t know how to declare this 1000 digits integer and I don’t know how to power it. And I don’t know the variable type of “p" at the end of the program.


#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <math.h>
#include <iostream>
#include <gmpxx.h>
#include <gmp.h>


using namespace std;

int main()

{
    clock_t start;
    start = clock();
    mpz_clears;
    mpf_clears;
    

    mpz_class p,trois;
        p=1;trois=3;
        int n;
    cout << “Enter a small integer between 1 and 20";
    cin >> n;
    
    mpz_pow_ui(p.get_mpz_t(),trois.get_mpz_t(),n);
    
    cout << "3^n=" << p;





   I NEED HERE TO DECLARE A INTEGER WITH 1000 DIGITS AND TO POWER IT WITH “p”.
    





start = clock() - start;
    cout<<"le temps de calcul est "<<start;
    cout<<"le nombre premier est "<<a;
    
    
    mpz_clears;
    
    mpf_clears;
    
    return 0;
}


Thank you for any help !


Thomas Lover
http://www.energyistheglobalcurreny.org/
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thomaslover at ntymail.com
+918524959404, Auroville, India