Thread: if... else statement errors?

I'm having a bit of trouble with the if... else statements. I thought I had it right, but when I start the program... I don't get any results. I'll post the problem and my code and maybe someone could help me out.

Problem:
CSC110
IF…ELSE Program


Description: The new Telephone Company has the following rate structure for long-distance calls:

1. The regular rate for a call is $0.10 per minute
2. Any call started at or after 6:00pm (1800 hours) but before 8:00 am is discounted 50%
3. Any call longer than 60 minutes receives a 15% discount on its cost (after any other discount is subtracted).
4. All calls are subject to a 4% federal tax on their final cost.

Write a program that reads the start time for a call based on a 24-hour clock and the length of the call. Your report should show the gross cost (before any discounts or tax) , the disount (even if it is 0), the tax, and finally the net cost (after discounts are deducted and tax is added).

Code:

#include <iostream>
#include <iomanip>

using namespace std;

int main()

{
    // local variable
    int Start_Time;
    int Length_First;
    int Length_Second;
    int Length_Third;
    int End_Time;
    float Total;
    float Gross_Cost; //for gross cost
    float Length_Discount; //for length discount
    float Time_Discount; //for time discount
    float Total_Discounts; //for total discounts
    float Tax; //for tax
    float Reg_Rate = .10;
   
    // local constants
    const int FULL_MIN = 60;
    const int SIX_PM = 1800;
    const int EIGHT_AM = 800;
    const int ADD_HUNDRED = 100;
    const int OVER_HOUR = 0060;
   

    // Input Time Of Call
    cout << "What was the time of your phone call?";
    cin  >> Start_Time;
   
    // Input Length Of Minutes
    cout << "What was the length of your phone call in minutes?";
    cin  >> Length_First;
   
    //Clear the screen
    system("cls");
   
    //Calculate Discount  
        Total_Discounts = Length_Discount + Time_Discount;
       
    //Calculate Total
        Total = Gross_Cost - Total_Discounts;
       
    //Calculate Tax
        Tax = Total * 1.1;
   
    //If Statement

    if(Length_First >= FULL_MIN) //changes length if over 60 min.
        Length_Second = Length_First % FULL_MIN; //modulus by 60
{        
       if(Length_Third = Length_Second + ADD_HUNDRED) //adds 100
           End_Time = Length_Third + Start_Time; //calculates total

    else if(Length_Third > OVER_HOUR) //starts if length is over 0060
        Length_Discount = Gross_Cost * 0.2; //calculates length discounts
   
    else if(SIX_PM >= Length_Third || Length_Third >= EIGHT_AM)
        Time_Discount = Gross_Cost * 0.5; //calculates time discounts
}
    // End If
   
             
   //Display the percent of each model sold
    cout << setiosflags(ios::fixed | ios::showpoint) << setprecision(2);
    cout << "\n\n\n\n\n\n\n\n";
    cout << setw(56) << "Telephone Bill             "  << "\n";
    cout << setw(43) << "Category        " << setw(9)  << "Total"            << "\n\n";
    cout << setw(43) << "Original Gross  " << setw(9)    << Gross_Cost        << endl
         << setw(43) << "Discount        " << setw(9)    << Total_Discounts     << endl
         << setw(43) << "Tax             " << setw(9)  <<  Tax               << endl
         << setw(43) << "Final Gross     " << setw(9)  <<  Total  
         << "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
             
   
    //Pause The Output Screen For Viewing
    system("pause");
   
    return 0;
   
} // End Of Program