convert number to human-readable size in C

size.c

#include <stdio.h>
char *types[] = {"KB","MB","GB","TB","PB","EB","ZB","YB"};
void change(int *size)
{
    int div = 1024;
    int i = 0;
    for(;i<8;i++)
    {
        *size /= div;
        if(*size < div)
        {
            printf("%d %s\n",*size,*(types+i));
            break;
        }
    }
}

void main()
{
    int size = 2048;
    change(&size);
    
    size = 225614;
    change(&size);
    
    size = 225614000;
    change(&size);
}