Given two Strings, the task is to concatenate the two Strings using Command Line Arguments.
Examples:
Input: str1 = "hello", str2 = "world" Output: helloworld Input: str1 = "Geeks", str2 = "World" Output: GeeksWorld
Approach:
- Since the Strings are entered as Command line Arguments, there is no need for a dedicated input line
- Extract the input Strings from the command line argument
- Concatenate the given strings using the respective methods.
- Print or return the concatenated strings
Program:
C
// C program to concatenate the two Strings // using command line arguments #include <stdio.h> #include <stdlib.h> /* atoi */ #include <string.h> // Function to concatenate the Strings char * concat( char dest[], char src[])
{ // Appends the entire string
// of src to dest
strcat (dest, src);
// Return the concatenated String
return dest;
} // Driver code int main( int argc, char * argv[])
{ // Check if the length of args array is 1
if (argc == 1)
printf ( "No command line arguments found.\n" );
else {
// Get the command line arguments
// and concatenate them
printf ( "%s\n" , concat(argv[1], argv[2]));
}
return 0;
} |
Java
// Java program to concatenate the two Strings // using command line arguments class GFG {
// Function to concatenate the String
public static String concat(String dest, String src)
{
// Return the concatenated String
return (dest + src);
}
// Driver code
public static void main(String[] args)
{
// Check if length of args array is
// greater than 0
if (args.length > 0 ) {
// Get the command line arguments
// and concatenate them
System.out.println(concat(args[ 0 ], args[ 1 ]));
}
else
System.out.println( "No command line "
+ "arguments found." );
}
} |
Output: