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Advanced Programming Techniques in C

Solution Review: Multiply Array Elements by 3

Explore how to multiply each element in an integer array by 3 using pointer arithmetic and loops in C. Understand how arrays provide base addresses and how pointer increments access subsequent elements. Learn to use pointers to directly modify array contents in place.

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Solution

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C
# include <stdio.h>



void modifyArray ( int *arr, int n ) ;



int main( )

{

	int  i ;

	static int  array[   ] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 } ;

	printf ( "\nOriginal Array is:\n" ) ;

	for ( i = 0 ; i < 10 ; i++ )

		printf ( "%d ", array[ i ] ) ;  

	modifyArray ( array, 10 ) ;  

	printf ( "\n\nModified Array is: \n" ) ;

	for ( i = 0 ; i < 10 ; i++ )

		printf ( "%d ", array[ i ] ) ;  

	return 0 ;

}



void modifyArray ( int *arr, int n )  

{   

	// Declares a variable i

	int  i ;

	// for loop to traverse the array

	for ( i = 0 ; i < n ; i++ )

	{

		// Multiply current element by 3

		*arr = *arr * 3 ; 

        // Move to the next element

		arr++ ;  

	}

}

Explanation

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