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  1. Prepare
  2. C++
  3. Introduction
  4. Pointer
  5. Discussions

Pointer

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  • omike1900
     + 43 comments

    you can not include any library, just like this

    void update(int *a,int *b) {
    int sum = *a + *b;
    int absDifference = *a - *b > 0 ? *a - *b : -(*a - *b);
    *a = sum;
    *b = absDifference; 
}

  • giantmalik
     + 4 comments

    Can i get more problems related to pointers? i want some more to improve pointers.

  • sivaraam
     + 12 comments

    My Solution

    #include <stdio.h>
#include <stdlib.h>

void update(int *a,int *b) {
    // Complete this function    
    *a = *a + *b;
    
    *b =abs(*a - *b -*b);
}

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;
}

  • Ethan13310
     + 5 comments

    We don't want to use raw pointers in C++. We almost never use them, exept for interfacing with a C-written library. In this exercise, we should use references instead. But here's the solution:

    #include <cmath>

void update(int *a, int *b)
{
    int tmp{*a + *b};
    *b = std::abs(*a - *b);
    *a = tmp;
}

    And in real C++:

    #include <cmath>

void update(int &a, int &b)
{
    int tmp{a + b};
    b = std::abs(a - b);
    a = tmp;
}

  • jpverma
     + 3 comments

    include

    include

    using namespace std;

    void update(int *a,int *b) { // Complete this function 

    *a = *a + *b;
*b = abs(*b - (*a-*b));

    }

    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;

    }

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