Question

How to shift vector elements to left by one position in C++

Answer 1

#include <iostream>
#include <vector>
#include <algorithm>

int main()
{   
    std::vector<int> v = {1, 2, 3, 4, 5, 6, 7, 8, 9};

    // rotate to left
    std::rotate(v.begin(), v.begin() + 1, v.end());

    for (int i = 0; i < v.size(); i++) {
        std::cout << v[i] <<  " ";
    }

    return 0;
}    

 
 
 
 
/*
run:
 
2 3 4 5 6 7 8 9 1 
 
*/

 

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