What is a command-line argument?

Asked by Last Modified  

2 Answers

Learn C Language

Follow 3
Answer

Please enter your answer

Sadiq

C language Faculty (online Classes )

Command-line arguments are simple parameters that are given on the system's command line, and the values of these arguments are passed on to your program during program execution. When a program starts execution without user interaction, command-line arguments are used to pass values or files to...
read more
Command-line arguments aresimple parameters that are given on the system's command line, and the values of these arguments are passed on to your program during program execution. When a program starts execution without user interaction, command-line arguments are used to pass values or files to it. read less
Comments
Dislike Bookmark

You might be familiar with the following simple way to define the main function: int main() {/* blah blah */}but, the more general way to define main is as followsint main(int argc, char* argv) {/* blah blah */}Suppose you compile this file into say a.out, and then if you execute the program from the...
read more
You might be familiar with the following simple way to define the main function: int main() {/* blah blah */}but, the more general way to define main is as followsint main(int argc, char* argv[]) {/* blah blah */}Suppose you compile this file into say a.out, and then if you execute the program from the terminal (command prompt) as follows> ./a.out Hello World the words Hello, and World are called as command-line arguments, and a.out is the executable (or program). When executed as mentiond above, the values of argc and argv that the main function recieves would be as follows: argc gets a value of 3 (the length of the argv array) argv[0] points to a string with contents "./a.out" argv[1] points to a string with contents "Hello" and argv[2] points to a string with contents "World" Within the main function, you can program different behaviours depending on these variables. Learn by doing: Compile the following and execute it with different command-line arguments to see it in action: #include <stdio.h> int main(int argc, char* argv[]) { int i = 0; for(i = 0; i < argc; i++) printf("%s\n", argv[i]); return 0; } read less
Comments
Dislike Bookmark

Related Questions

Basics of 'C'language
C is middle level language, using C you can write program which directly interact with the hardware like device driver programming or you can write GUI application. C is very powerful language compare...
Raghavendra
If one leaves a lot of space in a C language code, will it require more space in a hard disk and RAM?
Head files tells system, how to deal with different functions with program such as printf(), scanf() , getche() etc. so you must have reference to it.
Abhishek
0 0
5

What is void main () into main and what it does?
Void means nothing or empty. void main() - means here main() return nothing.int main() - means here main() returns an integer value.
Noreen
Why do we still use C language?
C language is still widely used for several reasons. It offers low-level memory manipulation, high performance, and efficient hardware access, making it suitable for system-level programming, embedded...
Aditi
0 0
5
What is meaning of & in c language?
In the C family of languages, &x means “the address of x” and *y means “the value at the address y”.
Khushwunder
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

C Program-Upper Case Demo
/*WAP to print the character entered by user in upper case*/ //Header files #include<stdio.h>#include<conio.h> //Main function void main(){ char ch; //Function for clearing screen clrscr(); ...

Salim ahmed Ansari

0 0
0
How do i get best Campus / Off Campus Placement?
Companies are looking for Skilled Freshers. So build your technical skills while doing MCA / BTech / BCA / BSc (IT or CS) into below areas- 1. Strong your programming & debugging skills ...

Amit K.

0 0
0
C INTRODUCTION

Nagaraju Tanguturi

0 0
0
Pro learners tip for C language
First get the concept of algorithm before heading to write your first program.

Pintu Das

0 0
0
Introduction to Programming Languages
What is a Programming Language? A programming language is a formal computer language or constructed language designed to communicate instructions to a machine, particularly a computer. Programming languages...

Clevigour solutions

2 0
1

Recommended Articles

Lasya Infotech: An educational Training...

Lasya Infotech is a Hyderabad based IT training institute founded in 2016 by O Venkat. Believing in his innovation, passion and persistence and with a diverse blend of experience, he started his brainchild to deliver exemplary professional courses to aspiring candidates by honing their skills. Ever since the institute envisions...

Read full article >

Brilliant Academy, a reputed B. Tech Tuition...

Brilliant Academy is one of the reputed institutes for B.Tech tuition classes. This institute is specialised in delivering quality tuition classes for B.E, Engineering - all streams and Engineering diploma courses. Incorporated in 2012, Brillant Academy is a brainchild of Mr Jagadeesh. The main motto of the academy is to...

Read full article >

Make a Career as a BPO Professional

Business Process outsourcing (BPO) services can be considered as a kind of outsourcing which involves subletting of specific functions associated with any business to a third party service provider. BPO is usually administered as a cost-saving procedure for functions which an organization needs but does not rely upon to...

Read full article >

Why Should you Become an IT Consultant

Information technology consultancy or Information technology consulting is a specialized field in which one can set their focus on providing advisory services to business firms on finding ways to use innovations in information technology to further their business and meet the objectives of the business. Not only does...

Read full article >

Find C Language Classes near you
C Language Classes in Bangalore
C Language Classes in Hyderabad
C Language Classes in Delhi
C Language Classes in Pune
C Language Classes in Chennai
C Language Classes in Mumbai
C Language Classes in Kolkata
C Language Classes in Noida
C Language Classes in Gurgaon
C Language Classes in Ghaziabad

Looking for C Language Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you