Problems reversing large int

[ianfrost]

im trying to reverse a large int.getting a problem with the pow function.
Say i try to reverse 234 im getting 431..
here is the code im using


#include <stdio.h>
#include <stdlib.h>
#include <math.h>
main(){
int i,number, tnum, index, reverse = 0;
printf("Please enter an integer: ");
scanf("%d", &number);
index = log10(number);


for (i = index; i>=0; i--)
{
tnum = number % 10;
reverse += tnum * pow(10,i);
number = number / 10;
}
printf("%d\n",reverse);

system("pause");
}


thanks in advance