I need some help completing a program please!

[tcate1124]

Ok the first part is my incomplete program that I am writing and the second half is the instructions. We are using g++ compiler with vim editor on ssh secure shell. Please someone help me because I am lost. Thank you

/* File: lab2.cpp
 * Author: Tyler Cate
 * Description: This program calculates the log volume of forest tree products 
 * and gives the price of that tree product.
*/

#include<iostream>
using namespace std;

//Declare the constant volume given based on log grade and type
	const int Crosstie_Logs = 1;
	const int White_Oak_Stave_Logs = 2;
	const int Softwood_Logs = 3;
	const int Crosstie_Grade1 = 375;
	const int Crosstie_Grade2 = 275;
	const int White_Oak_Stave_Grade1 = 950;
	const int White_Oak_Stave_Grade2 = 750;
	const int White_Oak_Stave_Grade3 = 425;
	const int Softwood_Type1 = 125;
	const int Softwood_Type2 = 225;
	const int Softwood_Type3 = 180;
	double Log_Type;
	double Log_Grade;
	double Log_Length;
	double Log_DIB;
	double Log_Price;
	double Log_Volume;
	double wood_type;

int main ()
{
//Welcomes the user to the program
 	cout << "Welcome to Forest Products of Tennessee. \n";

//Prompts the user for log type
	cout << "1 Crosstie Log \n";
	cout << "2 White Oak Stave Log \n";
	cout << "3 Softwood Log \n";
	cout << "Enter log type by number: ";
	cin >> Log_Type;
//Prompts the user for log length in feet
	cout << "Enter log length in feet: ";
	cin >> Log_Length;
//Prompts user for DIB in inches
	cout << "Enter Log DIB in inches: ";
	cin >> Log_DIB;

//Reads the user input based on log grade
	if (Log_Type == Crosstie_Logs || Log_Type == White_Oak_Stave_Logs)
	{
	cout << "Enter log grade: ";
	cin >> Log_Grade;
	}
//Prompts the user for wood type when log type is softwood
	else (Log_Type == Softwood_Logs);
	{
	cout << "1 SY Pine \n";
	cout << "2 White Pine \n";
	cout << "3 Hemlock \n";
	cout << "Enter wood type by number: ";
	cin >> wood_type;
        }

return (0);
}

Instructions:

General Information
This application calculates the price of certain delivered forest products in East Tennessee

Detailed Information
This program calculates the price of a single log from a tree in East Tennessee. Use the following chart to determine volume and cost:

Crosstie Logs
Length 8.75’ min
DIB (Diameter Inside Bark) 11” min
Grade 1: $375/MBF (1000 Board Feet)
Grade 2: $275/MBF

White Oak Stave Logs
Length 8.5’ min
DIB 12” min
Grade 1: $950/MBF
Grade 2: $750/MBF
Grade 3: $425/MBF

Softwood Logs
Length 8’ min
DIB 6” min
Softwood Logs wood type
SY Pine: $125/MBF
White Pine: $225/MBF
Hemlock: $180/MBF


The log volume formula below, called the Doyle Log Rule, calculates the number of 1’ boards you can get out of a log. You need to know the number of boards a log will generate to compute price since prices above are per 1000, one-foot boards.

V = (D-4)^2*L/16

where V is log volume in board feet, D is the DIB in inches, L is the log length measured in feet.

Inputs are below. You may assume all user inputs will be valid/in range for this program.
Log type: Crosstie Logs, White Oak Stave Logs or Softwood Logs.
Log length in feet
DIB in inches
Log grade (if Crosstie or White Oak). Log type if Softwood.

Use constants for full credit on your lab! I used 14 constants!

Outputs (in exactly the format specified!)
A welcome message:
Welcome to Forest Products in Tennessee.
Menu and prompt for log types:
1 Crosstie Log
2 White Oak Stave Log
3 Softwood Log
Enter log type by number:
Prompt for log length:
Enter log length in feet:
Prompt for log DIB (Diameter Inside Bark):
Enter log DIB in inches:
Prompt for grade (when log type is Crosstie or White Oak):
Enter log grade:
Prompt for wood type (when log is Softwood):
1 SY Pine
2 White Pine
3 Hemlock
Enter wood type by number:
The volume of the log and its price (with exactly one digit to the right of the decimal for volume and two digits to the right of the decimal for price):
Log volume: 30.9 board feet
Log price: $11.59
A good-bye message:
Thank you for using this program!

Sample execution 1:
1 Crosstie Log
2 White Oak Stave Log
3 Softwood Log
Enter log type by number: 1
Enter log length in feet: 9.8
Enter log DIB in inches: 11.1
Enter log grade: 1
Log volume: 30.9 board feet
Log price $11.58
Thank you for using this program!

Sample execution 2:
1 Crosstie Log
2 White Oak Stave Log
3 Softwood Log
Enter log type by number: 3
Enter log length in feet: 15.6
Enter log DIB in inches: 7.9
1 SY Pine
2 White Pine
3 Hemlock
Enter wood type by number: 3
Log volume: 14.8 board feet
Log price: $2.67
Thank you for using this program!

[Bdanielz]

Do you have a specific question? What are you suck on?

[tcate1124]

Well do you think my code looks right so far? for one thing my else statement isn't working for some reason and i dont know what to do next

thanks for replying

[Bdanielz]

start with explaining what you want your else statement to do, and also explain what you see it doing.

[shoyoninja]

In this:

else (Log_Type == Softwood_Logs);
	{
	cout << "1 SY Pine \n";
	cout << "2 White Pine \n";
	cout << "3 Hemlock \n";
	cout << "Enter wood type by number: ";
	cin >> wood_type;
        }

Notice that else does not evaluate a condition like a if statement. So, when you enter else block, instead of executing the code in the brakets, it simply executes the logical statement (Log_Type == Softwood_Logs).

This means that the code within the block that follows gets executed always.

If the only other possible outcome is that Log_Type == Softwood_Logs, then you could rewrite it simply:

else
	{
	cout << "1 SY Pine \n";
	cout << "2 White Pine \n";
	cout << "3 Hemlock \n";
	cout << "Enter wood type by number: ";
	cin >> wood_type;
        }

Or, if that condition needs to be evaluated:

else if (Log_Type == Softwood_Logs)
	{
	cout << "1 SY Pine \n";
	cout << "2 White Pine \n";
	cout << "3 Hemlock \n";
	cout << "Enter wood type by number: ";
	cin >> wood_type;
        }

If you precise other problems, we may be able to help further.

Something else that may give you a problem, you are not validating the user input. What if the person enters "50"?