CSE102 Homework 5 Solved

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For this assignment, you are expected to write an interactive program which, according to the user input, creates dynamic responses and do simple calculations.

A compound object will be defined interactively and you program will keep track of a simple property and return a result based on the composition of the object.

Example:

Suppose that you want to calculate the total cost of a bicycle. In this case your compound object is a bicycle. A bicycle has many parts and some of the parts are also compound objects individually. So, a hierarchical structure can be used in order to model such a compound object. You can visualize it as a tree. Nodes are the parts and the children of a particular node are the parts which make up the part associated with that node.

Price

Bicycle x 1

Wheel x 2

Rim x 1                 60.0

Spoke x 28            12.0

Hub x 1

Gear x 6            25.0

Axle x 1

Nut x 7           0.15

Bolt x 5         0.1

Frame x 1

Rearframe x 1      170.0

Frontframe x 1

Fork x 2             21.5

Handle x 1         12.0

Figure 1: Composition of a bicycle

Figure 1 shows parts of a bicycle. A bicycle can be described as an object which consists of 2 wheels and a frame. We can create a more detailed description by including the description of the individual parts, wheel and frame. A description includes number of the parts, part name and, if no further description is needed, prices of the part or parts.

Your program does not know anything about the compound object. Expectation is either there is a compound object which can be specified by its parts or there is a simple object which can be specified by its property For this example, the property is the price of an object. Your program will ask questions to the user and eventually calculate the total price of the bicycle the user described.

Below is a simple dialog which the user describes the object ‘bicycle’ to the program:

> Define the object:

> Bicycle

> What is Bicycle?:

> 2*Wheel+1*Frame > What is Wheel?: > 1*Rim+28*Spoke+1*Hub > What is Rim?:

> 60.0

> What is Spoke?:

> 12.0

> What is Hub?:

> 6*Gear+1*Axle

> What is Gear?: > 25.0

> What is Axle?:

> 7*Nut+5*Bolt

> What is Nut?:

> 0.15

> What is Bolt?:

> 0.1

> What is Frame?: > 1*Rearframe+1*Frontframe > What is Rearframe?:

> 170.0 > What is Frontframe?

> 1*Fork+1*Handle > What is Fork?:

> 21.5 > What is Handle?:

> 12.0

> Total cost of Bicycle is 1320.1

Remarks

  • You will construct the required data structure on-the-fly.
  • You can assume the maximum length of a user input will not exceed 100
  • There may be spaces in between the terms of the user input. Below is a valid input:

1*                 Rearframe        +       1         *         Frontframe

  • Do not submit your code without testing it with several different scenarios. Bicycle and its structure are presented as an example only. Your program should run if the user tries to describe another object. For example: A car engine, a meal, etc…
  • You can use c structs, unions, arrays, c strings, pointers, dynamic memory allocation, etc…
  • Write comments in your code.
  • If your code does not compile you will get 0
  • Do not share your code with your classmates.

Turn in:

  • Source code of a complete C program. Name of the file should be in this format: <full_name>_<id>.c.
  • Example: c. Please do not use any Turkish special characters.
  • You don’t need to use an IDE for this assignment. Your code will be compiled and run in a command window.
  • Your code will be compiled and tested on a Linux machine(Ubuntu). GCC will be used.
  • Make sure that your program does not require specific encodings/markings/line-ending-chars. Make sure it works with a file created in a linux environment.
  • Make sure you don’t get compile errors when you issue this command : gcc <full_name>_<id>.c.
  • A script will be used in order to check the correctness of your results. So, be careful not to violate the expected output format.
  • Provide comments unless you are not interested in partial credit. (If I cannot easily understand your design, you may loose points.)
  • You may not get full credit if your implementation contradicts with the statements in this document.
  • If your program requires additional compile and link options, state that requirement at beginning of your source code as a comment.
  • hw5-m7yfly.zip