Question

How to fill all elements of an array with 0 in C++

Answer 1

#include <iostream>
#include <array>

template <typename T>
void print(const T &arr) {
    for (const auto &element : arr) {
        std::cout << element << ' ';
    }
    std::cout << "\n";
}
 
int main()
{
    std::array<int, 5> arr;
 
    arr.fill(0);
 
    print(arr);
}
 
 
 
/*
run:
 
0 0 0 0 0 
 
*/

 

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Answer 2

#include <iostream>
#include <cstring> 

template <typename T>
void print(const T &arr) {
    for (const auto &element : arr) {
        std::cout << element << ' ';
    }
    std::cout << "\n";
}


int main() {
    int arr[5];
    
    memset(arr, 0, sizeof(arr));
    
    print(arr);
}
 
 
 
/*
run:
 
0 0 0 0 0 
 
*/

 

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Answer 3

#include <iostream>

template <typename T>
void print(const T &arr) {
    for (const auto &element : arr) {
        std::cout << element << ' ';
    }
    std::cout << "\n";
}


int main() {
    int arr[5] = {0};

    print(arr);
}
 
 
 
/*
run:
 
0 0 0 0 0 
 
*/

 

70+ SQL courses for beginners and professionals