Question

How to swap elements between int array and vector with C++

Answer 1

#include <iostream>
#include <vector>    
 
void printVector(std::vector<int> const &v) {
    for (auto const &n: v) {
        std::cout << n << " ";
    }
}
 
int main () {
    int arr[] = { 1, 2, 3, 4, 5, 6, 7 };             
    std::vector<int> vec (5, 100); 
     
    printVector(vec);
    std::cout << '\n';
 
    std::iter_swap(arr, vec.begin());
   
    printVector(vec);
    std::cout << '\n';
                                                
    std::iter_swap(arr + 3, vec.begin() + 2); 
     
    printVector(vec);                                           
}
 
 
 
 
/*
run:
 
100 100 100 100 100 
1 100 100 100 100 
1 100 4 100 100 
 
*/

 

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