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

What does %d mean in the C programming language?
signed decimal integer %d is not the only format specifier in C to represent integers. To be precise, %d is used to represent a signed decimal integer.
Vikas
0 0
View Comments6
Why is the C language important?
due to its efficiency, portability, and widespread use in system programming, embedded systems, and operating system development.
Soumya
0 0
View Comments6
How do you override a defined macro?
We can use the #ifdef and #undef directive to undefine a previously defined macro.
Sharmistha
What is a calling function in C?
In C, a calling function, also referred to as a calling routine or a caller, is a function that invokes or "calls" another function. When a program executes, control is transferred from the calling function...
Deepika
0 0
View Comments6
How can I improve my C language skills so that if anyone asks me any questions about C, I can have the answer to those particular questions?
There are types of questions asked in this sector. 1.Related to Syntax and theoretical. For this you have to have a sound knowledge of the language. 2.Related to programming and output's. For this...
Furqankhan
0 0
View Comments5

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 for Begginers
C is an procedure oriented programming language. For any begginer the word program is new. Program: Set of instructions to be followed by machine or computer. Instruction Examples: Arithmetic instruction...

Sonali K.

5 0
View Comments0
C Program-Prime Number
/*WAP to print a number entered by the user is prime or not*/ //Header files #include<stdio.h>#include<conio.h> //Main function void main(){ int num,i; //Function for clearing screen clrscr();...

Salim Ahmed Ansari

0 0
View Comments0
PRACTISE makes you PERFECT ; ; ; There is no SUBSTITUTE for HARD WORK ;;;;Breathe SUCCESS like OXYGEN
Proper Planning ( reg what portions to be covered today) revising today's class portions & clarifying doubts solving Maths problems regularly ,noting down formulae separately trying to understand...

Kiruthika S.

1 0
View Comments0
Do You Know How Is Size Of Structure Defined?
Size of the structure is defined based on multiplies of bigger data type member in the structure. Example: If a structure contains integer, char, short data type, then size of the Structure will be multiples...

Umasankar Natarajan

0 0
View Comments0
Why C is a Language and not a database?
When I interviewed a candidate, I raised this question many times, but I have not got the answer correctly. To under why C is a language and not a database, it is good to understand why our communication...

Vihanga Embedsoft

0 0
View Comments0

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 Ghaziabad
C Language Classes in Gurgaon

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