i want to print the double base representation of a number ie if my number is 38 i shud get 36 + 2 and for 655 i shud get 648 + 6 + 1. here's my code: Code: unsigned long bs(unsigned long a[],unsigned long d, unsigned long beg, unsigned long end, unsigned long x) { int mid; mid=(beg+end)/2; if (x<a[mid]) { end=mid-1; bs(a,d,beg,end,x); } else if(x<a[mid]) { beg=mid+1; bs(a,d,beg,end,x); } else if(x>a[end]) { cout<<a[end]<<" + "; return a[end]; } else if(x==a[mid]) { cout<<"FOUND!!\n"; return a[mid]; } } void alg(unsigned long a[],unsigned long d, unsigned long x) { unsigned long num; num=(x-bs(a,d,0,30,x)); if (num>0) alg(a,d,num); } main() { int c,n,d; d=c=(unsigned long)(pow(32,2)); unsigned long a[d],b[c],t,x,y; d=c=0; a[0]=0; b[0]=0; for(int i=0;i<32;i++) { for(int j=0;j<32;j++) { b[c]=(unsigned long)(pow(2,i)*pow(3,j)); if(j==0 || ULONG_MAX/pow(3,j)>pow(2,i)) { a[++d]=b[c++]; // cout<<i<<"\t"<<j<<"\t"<<a[d]<<endl; } else { break; } } } sort(a,a+d); cout<<"enter element:"; cin>>x; cout<<"its representation is :"<<endl; alg(a,d,x); system("PAUSE"); } wat im doing in my code for alg() is im finding the element in the array using bs() if the elemnt i want is in the array im printing that otherwise im finding the element that is closest (from the lesser side) to it and finding the difference ie (x - closest number to x) and calling alg for the difference and so on. ie for 655 the closest elemnt is 648 and 655-648 is 7 , calling alg with 7 gives the closest elemnt as 6 n 7-6 is 1 n so on.. in my bs() code im returning the elemnt or the one which is closest to it. but somehow its not printing that elemnt n neither is it returning it. please help... thanks for reading!

I hate to say this, but ijk, I really need to inspect your program yourself before dumping it in a forum. Yeah, dumping is a harsh word to use, but look at your code. What do you think you are doing ! There are so damn many many mistakes. It was really really painful to find and correct the mistakes. It would have been much easier for me to write a program for double base representation, by myself. ( This is not an article, but don't blame me if it's as long as an article; 'cuz I have to highlight the mistakes ) Mistakes : Code: [FONT="Fixedsys"]unsigned long bs(unsigned long a[],[COLOR="Red"]unsigned long d,[/COLOR] unsigned [COLOR="Red"]long[/COLOR] beg, unsigned [COLOR="Red"]long[/COLOR] end, unsigned long x) { [COLOR="Red"]// WHY DOES THIS FUNC ACCEPT 'd' ?? [/COLOR] int mid; mid=(beg+end)/2; if (x<a[mid]) { end=mid-1; bs(a,d,beg,end,x); } else if(x[COLOR="Red"]<[/COLOR]a[mid]) [COLOR="Red"]//same as previous case !!!!!!!!! [/COLOR] { beg=mid+1; bs(a,d,beg,end,x); } else if(x>a[end]) [COLOR="Red"]// This should be the 2nd IF-check.[/COLOR] { cout<<a[end]<<" + "; return a[end]; } else if(x==a[mid]) [COLOR="Red"]// This should be the first IF-check.[/COLOR] { cout<<"FOUND!!\n"; return a[mid]; } } void alg(unsigned long a[],unsigned [COLOR="Red"]long[/COLOR] d, unsigned long x) { unsigned long num; num=(x-bs(a,[COLOR="Red"]d,[/COLOR]0,[COLOR="Red"]30,[/COLOR]x)); if (num>0) alg(a,d,num); } [COLOR="Red"]int [/COLOR]main() { [COLOR="Red"]// main func was missing data-type ![/COLOR] int c,n,d; [COLOR="Red"]// 32^2 does not need unsigned long, unsigned int will do, array index should be int [/COLOR]not long. d=c=(unsigned long)(pow(32,2)); [COLOR="Red"] // array b was ABSOLUTELY un-necessary ![/COLOR] unsigned long a[d],b[c],t,x,y; d=c=0; a[0]=0; b[0]=0; for(int i=0;i<32;i++) { for(int j=0;j<32;j++) { b[c]=(unsigned long)(pow(2,i)*pow(3,j)); if(j==0 || ULONG_MAX/pow(3,j)>pow(2,i)) { a[++d]=b[c++]; // cout<<i<<"\t"<<j<<"\t"<<a[d]<<endl; } else { break; } } } sort(a,a+d); cout<<"enter element:"; cin>>x; cout<<"its representation is :"<<endl; alg(a,d,x); system("PAUSE"); [COLOR="Red"] return 0; // no return ! [/COLOR] }[/FONT] Remarks : (1) Your program is full of sh*t. You need to revise your C++ lessons. (2) Your algo implementations are really poor. Try to implement better algo. mad: Painfully) modified code: Code: #include <iostream> #include <cmath> using namespace std; unsigned long bs(unsigned long a[], unsigned beg, unsigned end, unsigned long x) { unsigned long mid; mid=(beg+end)/2; if (x==a[mid]) { cout << a[mid]; return a[mid]; } else if (beg>end) { cout<<a[end]<<" + "; return a[end]; } else if (x<a[mid]) { end=mid-1; return bs(a,beg,end,x); } else if (x>a[mid]) { beg=mid+1; return bs(a,beg,end,x); } } void alg(unsigned long a[],unsigned d, unsigned long x) { unsigned long num; num=x-bs(a,0,d,x); if (num>0) alg(a,d,num); } const unsigned SIZE = 144; unsigned long a[SIZE],t,x,y; int main() { int c,n,d; d=c=0; a[0]=0; for (int i=0;i<12;i++) for (int j=0;j<12;j++) a[12*i+j]=(unsigned long)(pow(2.0,i)*pow(3.0,j)); sort(a,a+SIZE); cout<<"Enter element : "; cin>>x; cout<<"Its representation is : "<<endl; alg(a,SIZE-1,x); putchar(10); putchar(10); system("PAUSE"); return 0; } Sample run : Enter element : 655 Its representation is : 648 + 6 + 1 Enter element : 36 Its representation is : 36 Enter element : 38 Its representation is : 36 + 2 Enter element : 444 Its representation is : 432 + 12 Enter element : 555 Its representation is : 512 + 36 + 6 + 1 Enter element : 23743 Its representation is : 23328 + 384 + 27 + 4 Enter element : 25653 Its representation is : 23328 + 2304 + 18 + 3 Enter element : 1 Its representation is : 1 Enter element : 0 Its representation is : 0 I repeat again, Please inspect your program yourself before throwing it into a forum.