HackerRank Pointer solution in c++ programming YASH PAL, 31 July 202422 August 2024 In this HackerRank Pointer problem solution in the c++ programming language, A pointer in C++ is used to share a memory address among different contexts (primarily functions). They are used whenever a function needs to modify the content of a variable, but it does not have ownership. In order to access the memory address of a variable, val, prepend it with & sign. For example, &val returns the memory address of val. This memory address is assigned to a pointer and can be shared among functions. For example, int* p = &val assigns the memory address of val to pointer p. To access the content of the memory pointed to, prepend the variable name with a *. For example, *p will return the value stored in val and any modification to it will be performed on val. void increment(int *v) { (*v)++; } int main() { int a; scanf(“%d”, &a); increment(&a); printf(“%d”, a); return 0; } Function Description Complete the update function in the editor below. update has the following parameters: int *a: an integer int *b: an integer HackerRank Pointer problem solution in c++ programming. #include <stdio.h> void update(int *a,int *b) { // Complete this function int sum = *a + *b; int absDifference = *a - *b > 0 ? *a - *b : -(*a - *b); *a = sum; *b = absDifference; } int main() { int a, b; int *pa = &a, *pb = &b; scanf("%d %d", &a, &b); update(pa, pb); printf("%dn%d", a, b); return 0; } Second solution #include <cstdio> #include <cstdlib> // required to use the built-in abs() function void update(int *a,int *b) { int temp = *a; *a = *a + *b; *b = abs(temp - *b); } int main() { int a, b; int *pa = &a, *pb = &b; scanf("%d %d", &a, &b); update(pa, pb); printf("%dn%d", a, b); return 0; } Third solution #include <stdio.h> int abs(int a) { return (a>0 ? a : -a); } void update(int *a,int *b) { *a = *a + *b; *b = abs(*a - 2 * *b); } int main() { int a, b; int *pa = &a, *pb = &b; scanf("%d %d", &a, &b); update(pa, pb); printf("%dn%d", a, b); return 0; } coding problems cpp hackerrank solutions