Command line arguments in C

Command line arguments in C

     It is possible to pass some arguments from the command line to your C programs when they are executed. These arguments are called command line arguments. They are,

• argc
• argv[]

where,

argc      -->  Number of arguments in the command line including program name
argv[]   –>  This is carrying all the arguments

• In real time application, it will happen to pass arguments to the main program itself.  These arguments are passed to the main () function while executing binary file from command line.

Example1:

#include<stdio.h>

#include<conio.h>                        

main(int argc, char *argv[])

{

int  i;

clrscr();

if(argc==1)

{

printf("\n Pass the arguments more than one");

exit(1);

}

for(i=1; i<argc; i++)

printf("%s",argv[i]);

}

Example2:

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

main(int argc, char *argv[])

{

int  i, n, sum=0;

clrscr();

if(argc==1)

{

printf("\n Pass the arguments more than one");

exit(1);

}

for(i=1; i<argc; i++)

{

n=atoi(argv[i]);

sum=sum+n;

} 

printf("\n Total  Sum is = %d",sum);

}