//-----------------------------------------------------------------------
//  By:      Matt White, 10-12-08, ITCS1212-001, ShipCost3.cpp
//  Purpose: Same as #2, with added error handling
//-----------------------------------------------------------------------
#include <iostream>
using namespace std;
double GetShipCost(double dWeight);
double GetRegionCost(char cRegion);

int main(){
    double dWeight; char cRegion;
    cout << "Item Weight = ";   cin >> dWeight;
    cout << "Item Region = ";   cin >> cRegion;

    cRegion = toupper(cRegion);																// Error handling code...
    if (dWeight<1 || dWeight>50) {cout << "\n\tError: Weight Range = 1-50"; goto End;}
    if (cRegion<65 || cRegion>68) {cout << "\n\tError: Region Range = A-D"; goto End;}

    cout << "\n\tWeight: " << dWeight << "\n\tRegion: " << (char)toupper(cRegion) << "\n\tPrice: " << GetShipCost(dWeight) + GetRegionCost(cRegion);
    End:
    return 0;
}


double GetShipCost(double dWeight){
    double dCost = 0;     // Initial Cost
    double dAdd = 0;      // Additonal amount added to initail cost
    int dLimit = 0;       // The limit of when add extra $$ for each pound over (used in final cost calculation)

    if (dWeight<5)                 {dCost=3;    dLimit=0; dAdd = 0;}
    if (dWeight>=5 && dWeight<10)  {dCost=3;    dLimit=5;  if (dWeight>5)  dAdd = .25;}
    if (dWeight>=10 && dWeight<15) {dCost=5.50; dLimit=10; if (dWeight>10) dAdd = .20;}
    if (dWeight>=15)               {dCost=8.50; dLimit=15; if (dWeight>15) dAdd = .10;}

    return dCost + (dAdd*(dWeight-dLimit));
}

double GetRegionCost(char cRegion){
    double dRet;
    switch (toupper(cRegion)){
        case 'A':    dRet = 1.0; break;
        case 'B':    dRet = 1.5; break;
        case 'C':    dRet = 2.0; break;
        case 'D':    dRet = 2.5; break;
    }
    return dRet;
}

// ----------------
// Directions:
//      1. Weight can only be (0,50) = 1-50
//      2. Region can only be A-D (ASCII: 65-68)
//      3. Region accepts lower & uppercase
// ----------------