function problems

I have just begun my intro to programming class, so please bear with me. When I set my precision I receive an error of something like: cannot convert bool to std; I know it's got something to do with my first function. I thought the result of the function was stored as an integer, but apparently that's not right. How can I alter the function, given my limited knowledge, so I can setprecision. Any suggestions would be greatly appreciated. Thanks.

Code:

#include <iostream>
#include <iomanip>
using namespace std;

int getQuantity (int);
float totalCost (int, const float);

int main()
{

    const float PC_COST = 995.00;
    const float MEM_COST = 89.95;
    const float ZIP_COST = 99.99;
    const float PRINT_COST = 119.50;

    int numberPCs, numberMem, numberZip, numberPrint,pc_quantity;
    int mem_quantity, zip_quantity, print_quantity;
    float  pc_total, mem_total, zip_total, print_total, totalOrder;


    cout<<"Enter the number of PC's:";
    pc_quantity= getQuantity(numberPCs);
    
    cout<<"Enter the number of memory cards:";
    mem_quantity= getQuantity(numberMem);
    
    cout<<"Enter the number of zip drives:";
    zip_quantity= getQuantity(numberZip);
    
    cout<<"Enter the number of printers:";
    print_quantity= getQuantity(numberPrint);
    
    cout<<"\n\n";

    cout<<"                 New Wave Computer Company "<<endl;
    cout<<"            ***********************************"<<endl;
    cout<<"Product"<<setw(25)<<" Cost each "<<setw(15)<<" Quantity "
        <<setw(15)<<" Total Cost "<<endl;
    cout<<"\n";



    pc_total= totalCost (pc_quantity, PC_COST);
    mem_total= totalCost (mem_quantity, MEM_COST);
    zip_total= totalCost (zip_quantity, ZIP_COST);
    print_total= totalCost (print_quantity, PRINT_COST);
    
    cout<<setiosflags(ios::fixed||ios::showpoint)<<setprecision(2);
    
    cout<<"Personal Computers"<<setw(11)<<PC_COST<<setw(15)<<pc_quantity
        <<setw(15)<<pc_total<<endl<<endl;
    cout<<"Memory Cards      "<<setw(11)<<MEM_COST<<setw(15)<<mem_quantity
        <<setw(15)<<mem_total<<endl<<endl;
    cout<<"Zip Drives        "<<setw(11)<<ZIP_COST<<setw(15)<<zip_quantity
        <<setw(15)<<zip_total<<endl<<endl;
    cout<<"Printers          "<<setw(11)<<PRINT_COST<<setw(15)<<print_quantity
        <<setw(15)<<print_total<<endl<<endl;

    totalOrder= pc_total + mem_total + zip_total + print_total;

    cout<<"Total Cost of Order"<<setw(40)<<totalOrder<<endl;

    return 0;

}

int getQuantity (int a)

{
     int x;
     cin>>x;
     a=x;
     if (a >=0 && a <=100)

       return x;
     else

       return 0;

}

float totalCost (int b, const float a)

{

    float totalCost = b * a;

       return totalCost;
}

Note that in function call:

pc_quantity= getQuantity(numberPCs);
you used variable numberPCs without defining it so results is unpredictable.
So as in
mem_quantity= getQuantity(numberMem);
zip_quantity= getQuantity(numberZip);
print_quantity= getQuantity(numberPrint);
You must use initialized variables:

Now is starting "Dirty Harry" on TV so I must be off!
Good Luck!

Code:

  pc_total= totalCost (pc_quantity, PC_COST);
    mem_total= totalCost (mem_quantity, MEM_COST);
    zip_total= totalCost (zip_quantity, ZIP_COST);
    print_total= totalCost (print_quantity, PRINT_COST);

i really dont find any advantage from making new variables like
pc_total , mem_total , zip_total , print_total as you make the program uses more memory without any use just waste of memory

i recommend that you dont define these variables as u dont need it

afterwards do the following

Code:

cout<<setiosflags(ios::fixed||ios::showpoint)<<setprecision(2);
    
    cout<<"Personal Computers"<<setw(11)<<PC_COST<<setw(15)<<pc_quantity
        <<setw(15)<<totalCost (pc_quantity, PC_COST)<<endl<<endl;
    cout<<"Memory Cards      "<<setw(11)<<MEM_COST<<setw(15)<<mem_quantity
        <<setw(15)<< totalCost (mem_quantity, MEM_COST)<<endl<<endl;
    cout<<"Zip Drives        "<<setw(11)<<ZIP_COST<<setw(15)<<zip_quantity
        <<setw(15)<<totalCost (zip_quantity, ZIP_COST)<<endl<<endl;
    cout<<"Printers          "<<setw(11)<<PRINT_COST<<setw(15)<<print_quantity
        <<setw(15)<<totalCost (print_quantity, PRINT_COST)<<endl<<endl;

    totalOrder= totalCost (pc_quantity, PC_COST)+  totalCost (mem_quantity, MEM_COST)+ totalCost (zip_quantity, ZIP_COST) + totalCost (print_quantity, PRINT_COST);