Pointers in C HackerRank Solution

Hello Programmers, In this post, you will know how to solve the Pointers in C HackerRank Solution. This problem is a part of the HackerRank C Programming Series.

One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.

Pointers in C

Objective

In this challenge, you will learn to implement the basic functionalities of pointers in C. A pointer in C is a way to share a memory address among different contexts (primarily functions). They are primarily used whenever a function needs to modify the content of a variable, of which it doesn’t have ownership.
In order to access the memory address of a variable,val, we need to prepend it with & sign. E.g., &val returns the memory address of val.
This memory address is assigned to a pointer and can be shared among various functions. E.g. int *p = &val will assign the memory address of val to pointer p. To access the content of the memory to which the pointer points, prepend it with a *. For example, *p will return the value reflected by val and any modification to it will be reflected at the source (val).

	void increment(int *v) {
        (*v)++; 
    }
      	int main() {
        int a;
        scanf("%d", &a);
        increment(&a);
        printf("%d", a);
    	return 0;      
    }     

Task

Complete the function void update(int *a,int *b). It receives two integer pointers, int* a and int* b. Set the value of a to their sum, and b to their absolute difference. There is no return value, and no return statement is needed.

.– a` = a+b
– b` = |a-b| 

Input Format

The input will contain two integers, a and b, separated by a newline.

Output Format

Modify the two values in place and the code stub main() will print their values.

Note: Input/ouput will be automatically handled. You only have to complete the function described in the ‘task’ section.

Pointers in C HackerRank Solution

#include <stdio.h>
#include <stdlib.h>
void update(int *a,int *b)
{
    // Pointers in C - Hacker Rank Solution START
    int x,y;
    x = *a + *b;
    y = *a - *b;
    *a = x;
    *b =abs(y);
    // Pointers in C - Hacker Rank Solution END
}
int main()
{
    int a, b;
    int *pa = &a, *pb = &b;
    scanf("%d %d", &a, &b);
    update(pa, pb);
    printf("%d\n%d", a, b);
    return 0;
}

Disclaimer: The above Problem (Pointers in C) is generated by Hackerrank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.

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