This program compiles on my PC but I got compile error...
Please help me..
#include <iostream.h>
#include <math.h>
unsigned long fackt(int t)
{
unsigned long tot=1;
int h;
for (h=1;h<=t;h++)
tot*=h;
return tot;
}
unsigned long f(int t, int t2)
{
if ((t<t2)||(t<=0)) return 0;
double o=1;
int p;
for(p=t-t2+1;p<=t;p++)
o*=p;
o/=fackt(t2);
return (unsigned long)o;
}
unsigned long getres(unsigned long val,int k2,bool bb,int b)
{
if (k2==0) return 0;
unsigned long res=0;
int kk=(int)(log(val)/log(b)+1);
bool b2=false;
if (val-pow(b,kk-1)<pow(b,kk-2)) b2=true;
res+=f(kk-1,k2);
if (k2>1)res+=getres(unsigned long(val-pow(b,kk-1)),k2-1,b2,b);
if (bb)
{
int i=0;
unsigned long buf=0;
for (i=0;i<k2;i++)
buf+=unsigned long(pow(b,kk-i-1));
if ((val>=buf)&&(buf>0)) res++;
}
return res;
}
int main()
{
unsigned long x,y;
int k,b;
cin>>x>>y>>k>>b;
unsigned long l,u,total=0;
l=getres(y,k,true,b);
u=getres(x-1,k,true,b);
cout<<l-u;
return 0;
}
