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


using namespace std;// not discussed yet.
// Prototype, Declaration
int Tax_Amount(int house_Sq);
int Tax_Amount(int house_Sq, int Vehicle_CC);
int Tax_Amount(int house_Sq, int Vehicle_CC, char Comercial);

void main(void)
{
int hsq;
int VCC;
char com;
cout<<"\n\n_________Well Come to CDGK Taxation Department System __________ ";
cout<<"\n\n Plesae Enter House SQ :";
cin>>hsq;
cout<<"\n\n Please Enter Vehicle CC : { Enter 0 for N/A } ";
cin>>VCC;
cout<<"\n\n Are These Property Use as Comercial:  { Press y = yes, n = no } ";
    cin>>com;
   // Function Calling Work:
if(VCC==0 && com=='n')
{
   int tax_Payable = Tax_Amount(hsq);
cout<<" \n\n Dear Customer Your Net Tax Payable Amount is :  "<<tax_Payable;
}
if(VCC>0 && com=='n')
{
   int tax_Payable = Tax_Amount(hsq,VCC);
cout<<" \n\n Dear Customer Your Net Tax Payable Amount is :  "<<tax_Payable;
}
if(VCC>0 && com=='y')
{
   int tax_Payable = Tax_Amount(hsq,VCC,com);
cout<<" \n Dear Customer Your Net Tax Payable Amount is :  "<<tax_Payable;
}

}

//Function Defination

int Tax_Amount(int house_Sq)
{
int Tax=(house_Sq*1000);
return Tax;

}

int Tax_Amount(int house_Sq, int Vehicle_CC)
{
     int Tax=(house_Sq*1000)+(Vehicle_CC*100);
return Tax;

}

int Tax_Amount(int house_Sq, int Vehicle_CC, char Comercial)
{
int Tax=(house_Sq*2000)+(Vehicle_CC*200);
return Tax;
}