I must use void paintPrice(float&area) and floatwallArea() as my functions. Can

Question

I must use      void paintPrice(float&area)       and       floatwallArea()      as my functions. Can youhelp me make these changes in this program??
#include <iostream>
#include<iomanip>
using namespace std;
int numRooms();
int numGals(float);
float paintPrice();
float wallArea(int);
float laborHrs(float);
void displayCost(int,float,float );
int main()
{
int rooms,i,gals;
float ppg,wall,hrs;
rooms=numRooms();
ppg=paintPrice();
wall=wallArea(rooms);
gals=numGals(wall);
hrs=laborHrs(wall);
displayCost(gals,ppg,hrs);
return 0;
}  
void displayCost (int gal, float price, float hrs)
{
float total,labor,paint;
paint=price*gal;
labor=hrs*34;
total=paint+labor;
cout<<"Gallons of paint:"<<setw(6)<<fixed<<setprecision(2)<<gal<<endl;
cout<<"Hours labor:     "<<setw(6)<<fixed<<setprecision(2)<<hrs<<endl;
cout<<"Paint cost:     $"<<setw(6)<<fixed<<setprecision(2)<<paint<<endl;
cout<<"Labor cost:     $"<<setw(6)<<fixed<<setprecision(2)<<labor<<endl;
cout<<"Total cost:     $"<<setw(6)<<fixed<<setprecision(2)<<total<<endl;
return;
}  
float laborHrs(float area)
{
float hr;
hr=area/115*2;
return hr;
}
float wallArea(int n)
{
int i,num;
float sum=0;
for(i=1;i<=n;i++)
    {
do
    {
     cout<<"Enter wall area forroom "<<i<<": ";
     cin>>num;
     if(num<100)
         cout<<"areaof each wall must be at least 100 ";
     }
     while(num<100);
     sum+=num;
     }
return sum;
}
float paintPrice()  
{
float n;
cout<<"Enter price per gallon of paint? ";
cin>>n;
return n;
}
int numGals (float area)
{
int gal;
gal=(int)(area/115+.9);
return gal;
}        
int numRooms()
{
int n;
cout<<"Enter number of rooms? ";
cin>>n;
return n;
}

I must use      void paintPrice(float&area)       and       floatwallArea()      as my functions. Can youhelp me make these changes in this program??
#include <iostream>
#include<iomanip>
using namespace std;
int numRooms();
int numGals(float);
float paintPrice();
float wallArea(int);
float laborHrs(float);
void displayCost(int,float,float );
int main()
{
int rooms,i,gals;
float ppg,wall,hrs;
rooms=numRooms();
ppg=paintPrice();
wall=wallArea(rooms);
gals=numGals(wall);
hrs=laborHrs(wall);
displayCost(gals,ppg,hrs);
return 0;
}  
void displayCost (int gal, float price, float hrs)
{
float total,labor,paint;
paint=price*gal;
labor=hrs*34;
total=paint+labor;
cout<<"Gallons of paint:"<<setw(6)<<fixed<<setprecision(2)<<gal<<endl;
cout<<"Hours labor:     "<<setw(6)<<fixed<<setprecision(2)<<hrs<<endl;
cout<<"Paint cost:     $"<<setw(6)<<fixed<<setprecision(2)<<paint<<endl;
cout<<"Labor cost:     $"<<setw(6)<<fixed<<setprecision(2)<<labor<<endl;
cout<<"Total cost:     $"<<setw(6)<<fixed<<setprecision(2)<<total<<endl;
return;
}  
float laborHrs(float area)
{
float hr;
hr=area/115*2;
return hr;
}
float wallArea(int n)
{
int i,num;
float sum=0;
for(i=1;i<=n;i++)
    {
do
    {
     cout<<"Enter wall area forroom "<<i<<": ";
     cin>>num;
     if(num<100)
         cout<<"areaof each wall must be at least 100 ";
     }
     while(num<100);
     sum+=num;
     }
return sum;
}
float paintPrice()  
{
float n;
cout<<"Enter price per gallon of paint? ";
cin>>n;
return n;
}
int numGals (float area)
{
int gal;
gal=(int)(area/115+.9);
return gal;
}        
int numRooms()
{
int n;
cout<<"Enter number of rooms? ";
cin>>n;
return n;
}

Explanation / Answer

please rate - thanks #include #include using namespace std; int numRooms(); int numGals(float); float paintPrice(float&); float wallArea(); float laborHrs(float); void displayCost(int,float,float ); int main() { int rooms,i,gals; float ppg,wall=0,hrs; rooms=numRooms(); for(i=1;i

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