Answered Essay: Explain in details default parameters in C++ with example

Explain in details default parameters in C++ with example

Expert Answer

 

In C++, we can call a function in different ways depending on the arguments passed to the function.

In case of default parameters, some default values are given to each parameter in the function prototype. The default values will be used when the values for the parameters are not passed during function call.

Otherwise, the passed values will overwrite the values of parameters and these values will be used inside the function.

For instance, for a function say, sum(int x = 6, int y = 3); i.e, default values of parameters x and y are 6 and 3 respectively. This function returns the sum of x and y.

The calling can be done as sum(5,8). In this case the values of x and y will be overwritten with values 5 and 4 respectively.

Another way of calling is, sum(5). In this case only the value of first parameter, x will be overwritten with 5 and value of y will be the default value 3.

And finally we can call it as, sum(). In this case no value is passed to the function. Therefore, default values for both x and y will be used as 6 and 3.

Program to demonstrate the above function calls:

#include <iostream>

using namespace std;

int sum(int x = 6, int y = 3);

int main()

{

int ans;

cout<<“for passing both values 5 and 8, sum is: “;

ans = sum(5,8);

cout<<ans;

cout << “nfor passing one value 5, sum is: “;

ans = sum(5);

cout<<ans;

 

cout << “nfor passing no values, sum is: “;

ans = sum();

cout<<ans;

return 0;

}

int sum(int x, int y)

{

return x+y;

}

OUTPUT:

Buy Essay
Calculate your paper price
Pages (550 words)
Approximate price: -

Help Me Write My Essay - Reasons:

Best Online Essay Writing Service

We strive to give our customers the best online essay writing experience. We Make sure essays are submitted on time and all the instructions are followed.

Our Writers are Experienced and Professional

Our essay writing service is founded on professional writers who are on stand by to help you any time.

Free Revision Fo all Essays

Sometimes you may require our writers to add on a point to make your essay as customised as possible, we will give you unlimited times to do this. And we will do it for free.

Timely Essay(s)

We understand the frustrations that comes with late essays and our writers are extra careful to not violate this term. Our support team is always engauging our writers to help you have your essay ahead of time.

Customised Essays &100% Confidential

Our Online writing Service has zero torelance for plagiarised papers. We have plagiarism checking tool that generate plagiarism reports just to make sure you are satisfied.

24/7 Customer Support

Our agents are ready to help you around the clock. Please feel free to reach out and enquire about anything.

Try it now!

Calculate the price of your order

Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

HOW OUR ONLINE ESSAY WRITING SERVICE WORKS

Let us write that nagging essay.

STEP 1

Submit Your Essay/Homework Instructions

By clicking on the "PLACE ORDER" button, tell us your requires. Be precise for an accurate customised essay. You may also upload any reading materials where applicable.

STEP 2

Pick A & Writer

Our ordering form will provide you with a list of writers and their feedbacks. At step 2, its time select a writer. Our online agents are on stand by to help you just in case.

STEP 3

Editing (OUR PART)

At this stage, our editor will go through your essay and make sure your writer did meet all the instructions.

STEP 4

Receive your Paper

After Editing, your paper will be sent to you via email.

× How can I help you?