I'm a newbie and I can't understand the errors in my program

>>costa = 2.00;


You are assigning a literal double to an int

try costa = 2

> and i still don't see how the total hours will be displayed?

My mistake - they won't... I didn't read your problem close enough.

The warnings are my fault - everything should be double to take care of fractions of an hour or fractions of a dollar

Code:

/* Calculate the total charges and the total hours for the 
parking garage. */ 

#include <iostream> 

using std::cout; 
using std::cin; 
using std::endl; 

void calculatecharges (double hoursa, double hoursb, double hoursc);

int main() 
{ 
double a, b, c; 

cout<<"Enter the number of hours for CAR 1:"; 
cin>>a; 

cout<<"Enter the number of hours for CAR 2:"; 
cin>>b; 

cout<<"Enter the number of hours for CAR 3:"; 
cin>>c; 

calculatecharges(a, b, c);

return 0; 
} 

void calculatecharges(double hoursa, double hoursb, double hoursc)
{
   double costa = 0;   
   double costb = 0;
   double costc = 0;
   double totalhours = 0;
   double totalcost = 0;
  
   if(hoursa <= 3)
        costa = 2;
   else if (hoursa >= 17)
        costa = 10;
   else
        costa = 2 + ((hoursa-3) * .5);

   if(hoursb <= 3)
        costb = 2;
   else if (hoursb >= 17)
        costb = 10;
   else
        costb = 2 + ((hoursa-3) * .5);

   if(hoursc <= 3)
        costc = 2;
   else if (hoursc >= 17)
        costc = 10;
   else
        costc = 2 + ((hoursc-3) * .5);
    
    totalhours = hoursa + hoursb + hoursc;
    totalcost = costa + costb + costc;
    cout<<"CAR 1 CHARGES: "<<costa<<endl; 
    cout<<"CAR 2 CHARGES: "<<costb<<endl; 
    cout<<"CAR 3 CHARGES: "<<costc<<endl; 
    cout<<"TOTAL: "<<totalhours<< " hours, $"<<totalcost<<endl;
}

THANKS SO MUCH! all of u have been such a great help. i think i'm gonna try to find C++ for dummies....i hear that's a good book to read. thanks again!

i don't know....i just ran the program, and it still doesn't work...i get this:

/tmp/ccUHX0O8.o: In function `main':
/tmp/ccUHX0O8.o(.text+0xa0): undefined reference to `calculatecharges(double, d'
collect2: ld returned 1 exit status

I am doing the same excercise...

except i use for loops for my customer

I tested your program and it runs fine. I don't know why u can't get it run. Make sure everything is right, header syntax etc...