Question

How to create an array with constexpr in C++

Answer 1

#include <iostream>

constexpr int get_total() {
    return 4;
}

void print_array(int arr[], int size) { 
    for (int i = 0; i < size; i++) { 
        std::cout << arr[i] << "  "; 
    } 
    std::cout << "\n"; 
} 
 

int main() {
    int arr[get_total() + 1] = {0}; 
    
    print_array(arr, sizeof(arr) / sizeof(arr[0])); 
}


/*
run:

0  0  0  0  0 

*/

 

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