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

Arrays Introduction

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1345 Discussions

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  • ali_dev423
     + 0 comments
    int main() {
    int n; cin >> n; 
    int *arr = new int[n]; // since cpp doent support VLAs sizing 
    for (int i = 0; i < n; i++) {
        cin >> arr[i]; 
    }
    for (int i = n - 1; i >= 0; i--) {
        cout << arr[i] << " "; 
    }
    delete [] arr; 
    return 0;
}

  • santyrojas_a
     + 0 comments

    I though Variable Length Arrays (VLAs) where not supported by C++, and my compiler thinks so too. I had to use vectors,

    #include <cmath>
#include <vector>
#include <iostream>
using namespace std;


int main() {
    int n{};
    cin >> n;
    
    if (n < 1 || n > 1000) return 1;
    
    vector<int> vec(n);
    
    // Read array.
    for (int i = 1; i < n + 1; i++) 
    {
        // Load input back to front so its reversed.
        cin >> vec[n - i];    
             
        // Validate.
        if (vec[n - i] < 1 || vec[n - i] > 10000) return 1; 
    }
    
    
    // Output array.
    for (int i = 0; i < n; i++)
    {
        cout << vec[i] << " ";
    }
		
		
    
    return 0;
}

  • EstherZarat
     + 0 comments

    Solving this problem helps build a solid foundation for understanding how arrays work. By finding the solution, you will enhance your learning experience on HackerRank. Fairplay24 pro register

  • saikakumanu2003
     + 0 comments

    include

    include

    include

    include

    include

    using namespace std;

    int main() { int n; cin>>n; vectorarr(n); for(int i=0;i>arr[i]; } for(int i=n-1;i>=0;i--){ cout<

  • erevos
     + 0 comments
    int main() {
        int num;
        std::cin>>num;
        int arr[num];
        for(int i=0;i<num;i++){cin>>arr[i];}
        for(int i=num;i--;){cout<<arr[i]<<" ";}
        return 0;
}