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a class that represent a point in a Cartesian plain has two data members ,one to store the x axis and another the y axis value
1. write the class
2. add to the class a parametrized constructor that initializes two data members using the two data values passed as argument
3 write a function that receives as two points as arguments and returns the distance between the two points ( you need to know the mathematical formula of the Pythagorean theorem)

I am a beginner of javascript and i want to which script we will write for below execution
script for to perform arithmetic app with use of switch case
1. script for leap year or not button click event
2. whether the script no is divisible by 3 and 5
and last write the script for checking whether the no is amstrong no or not

How To Throw Error when mail is not sending using php
for e.g suppose i m trying to send mail to not exist email address something like dsjahskjdhkjhaskdjhsdkjadkjhksjh@yahoo.com or any other than it should throw a error like mail is not sending to this recipient. means throw a error when we trying to send mail to not exist email address in that perticular domain. in the above case yahoo.com domain have to check whether dsjahskjdhkjhaskdjhsdkjadkjhksjh@yahoo.com exsit. if exist than mail is working fine but if not exist that email address into yahoo than it should be thrown a error.
Thanks
Mahendra Pumbhadiya

Your first task in developing the application for tracking contributors is to load a list of the people who are helping the cause. Design and develop a linked list, implemented as a stack, to track all of the contributors. You will read the contributor information from a file provided; it is a comma delimited (CSV) file. Your design should include the following:
Each contributor will have the following Information:
•Name: String; //the name of the contributor
•City: String; //the city in which the contributor lives
•Country: String; //the country in which the contributor lives
•Phone: String; //the phone number for the contributor
•Contribution: Double; //the amount of the contribution given by the contributor to the zoo
•ID: Integer; //identifier key for future needs
Contributor Functions/Methods:
•Input constructor: //to accept a string for the name and additional information for each contributor (this should call the Push constructor to implement the stack)
•Print constructor: //to print o