Question

How to use ranges::fill_n to assign a value to all elements in a range with C++

Answer 1

#include <algorithm>
#include <iostream>
#include <vector>
 
void println(const auto& v) {
    for (const auto& element : v) {
        std::cout << ' ' << element;
    }
    
    std::cout << '\n';
}
 
int main()
{
    constexpr auto n {8}; // n = 8;
 
    std::vector<std::string> vec(n, "▓▓░░");
    println(vec);
 
    std::ranges::fill_n(vec.begin(), n, "░░▓▓");
    println(vec);
}


 
 
/*
run:

 ▓▓░░ ▓▓░░ ▓▓░░ ▓▓░░ ▓▓░░ ▓▓░░ ▓▓░░ ▓▓░░
 ░░▓▓ ░░▓▓ ░░▓▓ ░░▓▓ ░░▓▓ ░░▓▓ ░░▓▓ ░░▓▓

*/

 

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