# Prolem with Integer Division

jack THE RED jack_the_red at hotmail.fr
Sat Feb 6 15:29:28 CET 2010

```Hi everyone!
I'm new to GMP and I have a problem regarding the integer division.
I did read the manual and tried a lot of the division function.

But the result is always something weird:
"so 1234 = 2 x 3218735876"
Can someone tell me what is the problem?

Code:

#include <stdio.h>
#include <gmp.h>

int main(){
mpz_t n;
mpz_t root;
mpz_t remainder;
mpz_t s;

mpz_init (n);
mpz_init (root);
mpz_init (remainder);
mpz_init (s);

printf("Please enter a number to by two: \n");
gmp_scanf ("%Zd",&n);

gmp_printf("number inputed %Zd  \n", n);
mpz_sqrt(root,n);
gmp_printf("number root %Zd  \n", root);
mpz_set(s,n);
mpz_mod_ui(remainder,s,2);//remainder <- n%2
if (mpz_cmp_ui(remainder,1)){// if remainder!=1 (means that n is an even number)

gmp_printf("This is an even number, so %Zd = 2 x ", n);
mpz_div_ui(n, n, 2); /// Error here!
gmp_printf("%lu \n", n);
}

mpz_clear (n);
mpz_clear (root);
mpz_clear (remainder);
mpz_clear (s);
return 0;
}
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```