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c++ array distance

Lucky Lion answered on July 17, 2023 Popularity 1/10 Helpfulness 1/10

answer c++ array distance

c++ array distance

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#include <iostream>
#include <iterator>
#include <vector>
 
int main() 
{
    std::vector<int> v{ 3, 1, 4 };
    std::cout << "distance(first, last) = "
              << std::distance(v.begin(), v.end()) << '\n'
              << "distance(last, first) = "
              << std::distance(v.end(), v.begin()) << '\n';
               //the behavior is undefined (until C++11)
 
    static constexpr auto il = { 3, 1, 4 };
    // Since C++17 `distance` can be used in constexpr context.
    static_assert(std::distance(il.begin(), il.end()) == 3);
    static_assert(std::distance(il.end(), il.begin()) == -3);
}

Popularity 1/10 Helpfulness 1/10 Language cpp

Source: en.cppreference.com

Tags: c++ distance

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