//Decimal to hexadecimal number  //programming by : Erfan Nasoori  //Date of send : 2009/1/11     #include <iostream.h>     void main()  {   int x,y,i;   int d,n=1;   int * r;   char h[16]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};      cout<<"Enter x : ";   cin>>x;   y=x;   while(x >= 10)   {      x/=10;     ++n;   }   r=new int[n];   for(i=0 ; y >= 16 ; ++i)   {      r[i]=y%16;     y /= 16;   }   r[i++]=y;      cout<<"16 base = ";   for(i=(n-1) ; i>=0 ; --i)   {      cout<<h[r[i]];   }  cin.get();  }