Program to convert a decimal number into binary, octal and pental code

#include<iostream.h>
 #include<conio.h>
 #include<stdio.h>


 long binary_code(int);
 double pental_code(int);
 double octal_code(int);

 main()
    {

       clrscr();

       int number;

       cout<<"\n ********** Decimal Number *********"<<endl;
       cout<<"\n For binary numbers ,enter from( 0 ---> 1023 ) "<<endl;

       cout<<"\n\n Enter the Decimal number = ";
       cin>>number;

       cout<<"\n ********** Binary Number **********"<<endl;
       cout<<"\t Binary Number = "<<binary_code(number)<<endl;

       cout<<"\n *********** Pental Code ***********"<<endl;
       cout<<"\t Pental Code = "<<pental_code(number)<<endl;

       cout<<"\n *********** Octal Code ************"<<endl;
       cout<<"\t Octal Code = "<<octal_code(number)<<endl;

       getch();
       return 0;
    }

 /*************************************************************************//*************************************************************************///------------------------  Function Definitions  -----------------------///*************************************************************************//*************************************************************************//*************************************************************************///---------------------------  binary_code(int)  ------------------------///*************************************************************************/long binary_code(int number)
    {
       int count=0;
       int resulting_array[25];
       int remainder;
       int qutiont;
       int size=0;

       long binary_number=0;
       long sum=0;
       longbase=1;

       while(number>0)
      {
         qutiont=number/2;
         remainder=number%2;
         number=qutiont;
         resulting_array[count]=remainder;

         size++;
         count++;
      }

       for(int j=0;j<size;j++)
      {
         sum=resulting_array[j]*base;
         base=base*10;
         binary_number+=sum;
      }

       return binary_number;
    }

 /*************************************************************************///---------------------------  pental_code(int)  ------------------------///*************************************************************************/double pental_code(int number)
    {
       int count=0;
       int resulting_array[25];
       int remainder;
       int qutiont;
       int size=0;

       double pental_number=0;
       double sum=0;
       doublebase=1;

       while(number>0)
      {
          qutiont=number/5;
          remainder=number%5;
          number=qutiont;
          resulting_array[count]=remainder;

          size++;
          count++;
      }

       for(int j=0;j<size;j++)
      {
         sum=resulting_array[j]*base;
         base=base*10;
         pental_number+=sum;
      }
       return pental_number;
    }

 /*************************************************************************///----------------------------  octal_code(int)  ------------------------///*************************************************************************/double octal_code(int number)
    {
       int count=0;
       int resulting_array[25];
       int remainder;
       int qutiont;
       int size=0;

       double octal_number=0;
       double sum=0;
       doublebase=1;

       while(number>0)
      {
          qutiont=number/8;
          remainder=number%8;
          number=qutiont;
          resulting_array[count]=remainder;

          count++;
          size++;
      }

       for(int j=0;j<size;j++)
      {
         sum=resulting_array[j]*base;
         base=base*10;
         octal_number+=sum;
      }
       return octal_number;
    }