Question

How to implement the pop_front function to remove the element of a vector in C++

Answer 1

#include <iostream>
#include <vector>

void pop_front(std::vector<int>& vec) {
    if (vec.size() == 0) {
        std::cout << "Vector is empty" << std::endl;
    }
    else {
        vec.erase(vec.begin());
    }
}

void print(std::vector<int>& vec) {
    for (int val : vec) {
        std::cout << val << " ";
    }    
}

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

    pop_front(vec);
    
    print(vec);
}



/*
run:

2 3 4 5 6 7 8 9 10 

*/

 

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