Question

How to print a vector in reverse order by overloading the << operator with C++

Answer 1

#include <iostream>
#include <vector>
#include <algorithm>
 
std::ostream& operator<<(std::ostream& os, const std::vector<char> &v) {
    for (int i = v.size() - 1; i >= 0; --i) {
        os << v.at(i) << " ";
    }
    return os;
}
  
int main()
{
    std::vector<char> v = {'a', 'b', 'c', 'd'};
    
    std::cout << v;
  
    return 0;
}
 
 
 
 
 
/*
run:
 
d c b a 
 
*/

 

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