tax program again

#include <iostream>
#include <string>
#include <cmath>

using namespace std;

int getChildren ();

double taxAmount(int, double, double, int);

void getData ();

int main ()

{
getData();
int getChildren ();
double taxAmount(int, double, double, int);
return 0;
}

void getData ()

{
char status, answer;
int numChildren;
double salary, pensionAmount, deductAmount;
int numPeople, standardExemption;
double tax;

cout<<"Enter 'm'arried or 's'ingle:";
cin>>status;
cout<<endl;

if (status=='m'||status=='M')
{
numChildren=getChildren();
standardExemption=7000;

cout<<"Do both spouses earn an income? Enter 'Y'es or 'N'o: ";
cin>>answer;
cout<<endl;

if (answer=='y'||answer=='Y')
{
cout<<"Please enter combined salary: ";
cin>>salary;
cout<<endl;
}
else if (answer=='n'||answer=='N')
{
cout<<"Please enter your salary: ";
cin>>salary;
cout<<endl;
}
numPeople=2+numChildren;
}
else
{
cout<<"Please enter your salary: ";
cin>>salary;
cout<<endl;
standardExemption=4000;
numPeople=1;
}

cout<<"Please enter pension plan amount: ";
cin>>pensionAmount;
cout<<endl;
}

int getChildren ()

{
int children;

cout<<"Enter number of children under 14: ";
cin>>children;
cout<<endl;

return children;

}

double taxAmount(int, double, double, int)
{

int numPeople;
double tax;
double salary, pensionAmount;
int standardExemption;
int amountoftax;


if (salary <=15000.00)
{

amountoftax = ((salary-((numPeople*1500.00)+ pensionAmount+ (standardExemption))*0.15);}

else if (salary>15000.00 and salary<=40000.00){

amountoftax=2250.00+(((((numPeople*1500.00)+pensionAmount+standardExemption))-15000.00)*0.25);}

else (salary>40000.00);{

amountoftax=8460.00+(((((numPeople*1500.00)+pensionAmount+standardExemption))-40000.00)*0.35);


tax = taxAmount(numPeople, salary, pensionAmount, standardExemption);


cout<<"Your tax amount is: "<<tax<<endl;
}

return 0;
}