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[vrx]

A critical-path analysis is a technique used to determine the schedule for a project. This information
is important in the playing stages before a project is begun, and it is also useful to evaluate the
progress of a project that is partially completed. One method for this analysis starts by dividing a
project into sequential events and then dividing each event into various tasks. Although one event
must be completed before the next one is started, various tasks within an event can occur
simultaneously. The time it takes to complete an event, therefore, depends on the number of days
required to finish its longest tasks. Similarly, the total time it takes to finish a project is the sum of
the time it takes to finish each event.
Assume that the critical-path information for a major construction project has been stored in a data
file named “project.dat” as atable consist of 3 data columns . Each line of the data file contains an
event number, a task number, and the number of days required to complete the task. The data have
been stored such that all the tasks data for event 1 are followed by all the tasks data for event 2,


Write a C++ program that uses “project.dat” file to store the critical-path information for a given
construction project. Your program should repeatedly display the following menu.
1- Display all Tasks
2- Find the event with longest duration
3- Compute the time to finish a given event
4- Compute project completion time
5- Add new task
6- Exit program
When the user selects option 6, your program must ask the user to confirm whether he/she actually
wants to exit the program. Your program must include at least the following functions:
1) DisplayMenu: Prints the menu, and verifies and returns the user’s choice.
2) displayAllTasks: Displays the list of all tasks in a readable tabular format as shown the sample
run below.
3) computeLongestEvent: returns the event number for the event with the longest duration (i.e.,
the event with the most time consuming task).
4) computeEventTime: receives the event number for a given event as an input parameter, and
returns the time needed to complete the specified event .
5) computeProjectTime: returns the total number of days needed for the project completion.
6) addNewTask: receives event number, task number and number of days needed to complete a
new task as input parameters. It adds the information for a new task to the end of
“project.dat” file.


Please help me.





[ilikepython]

A critical-path analysis is a technique used to determine the schedule for a project. This information
is important in the playing stages before a project is begun, and it is also useful to evaluate the
progress of a project that is partially completed. One method for this analysis starts by dividing a
project into sequential events and then dividing each event into various tasks. Although one event
must be completed before the next one is started, various tasks within an event can occur
simultaneously. The time it takes to complete an event, therefore, depends on the number of days
required to finish its longest tasks. Similarly, the total time it takes to finish a project is the sum of
the time it takes to finish each event.
Assume that the critical-path information for a major construction project has been stored in a data
file named “project.dat” as atable consist of 3 data columns . Each line of the data file contains an
event number, a task number, and the number of days required to complete the task. The data have
been stored such that all the tasks data for event 1 are followed by all the tasks data for event 2,


Write a C++ program that uses “project.dat” file to store the critical-path information for a given
construction project. Your program should repeatedly display the following menu.
1- Display all Tasks
2- Find the event with longest duration
3- Compute the time to finish a given event
4- Compute project completion time
5- Add new task
6- Exit program
When the user selects option 6, your program must ask the user to confirm whether he/she actually
wants to exit the program. Your program must include at least the following functions:
1) DisplayMenu: Prints the menu, and verifies and returns the user’s choice.
2) displayAllTasks: Displays the list of all tasks in a readable tabular format as shown the sample
run below.
3) computeLongestEvent: returns the event number for the event with the longest duration (i.e.,
the event with the most time consuming task).
4) computeEventTime: receives the event number for a given event as an input parameter, and
returns the time needed to complete the specified event .
5) computeProjectTime: returns the total number of days needed for the project completion.
6) addNewTask: receives event number, task number and number of days needed to complete a
new task as input parameters. It adds the information for a new task to the end of
“project.dat” file.


plz help meeeeeeeeeeeeeeeeeeeeeeeeeeee ):





VRX, please do not post questions in other people's threads and definately check out the posting guidelines.
Sorry about that joeschnell.

[sicarie]

Thread is split, however ilikepython is correct in pointing you to the Posting Guidelines - you have violated several rules such as not trying it yourself, thread hijacking, etc... So I will leave you with our canned response



The experts on this site are more than happy to help you with your problems but they cannot do your assignment/program for you. Attempt the assignment/program yourself first and post questions regarding any difficulties you have or about a particular function of the code that you don't know how to achieve.

Please read the Posting Guidelines and particularly the Coursework Posting Guidlines.

Then when you are ready post a new question in this thread.

MODERATOR

[ravenspoint]

This person is lost, and you guys beat him over the head with rules and regulations? Relax!

VRX, the first thing you need to think about is how you are gong to store the data in project.dat. Do you have any ideas so far?

[weaknessforcats]

This person is lost,....

Yes. And I bet no one knows what critical path means.

[JosAH]

Yes. And I bet no one knows what critical path means.

You lost, I do ;-) Think of a project with several activities as a directed graph.
The vertexes are the start/end points of activities, the edges are the activities
and their duration. Think of a project such as building a house: foundation
first, floors and walls next; electricity and gas can go simultaneously etc. etc.

Define two times per vertex: first possible start time and last possible end time.
The path from the start of the project to the end of the project that violates these
constraints is the 'critical path', i.e. when anything on that path takes longer
than planned, the entire project will take longer. google for 'PERT'.

kind regards,

Jos

[ravenspoint]

Yes. And I bet no one knows what critical path means.

You would lose that bet.

My first job, fresh faced with a shiny new Operational Research postgraduate degree, was to do a CP analysis of a new coal mine. Of course, the real benefit was not in the CP itself, but in forcing all those mining engineers to sit down and explain to me in painful detail how they went about digging a coal mine. "But," I asked, "wouldn't it make more sense to let the concrete floor set, before you build the scaffolding?" Once they recovered from the embarrassment they were nice enough to credit me with saving a week off the project duration and thus a million dollars - which helped no end when my six month probationary review came around.

[weaknessforcats]

I am still winning the bet.

The critical path is the sequence of tasks from project start to project end that have zero float time.

[JosAH]

I am still winning the bet.

The critical path is the sequence of tasks from project start to project end that have zero float time.

You lost! You said the secret f-word first! neener-neener-neener! ;-)

kind regards,

Jos

[weaknessforcats]

secret f-word first...

??

Let's see I used two f-words:

from
float

These look pretty inocuous.