[lab 13] Xây dựng các hàm cũ trong mảng bằng cấu trúc dữ liệu vector(24/8/2020)

[ITHelpself]

https://stackoverflow.com/questions/201718/concatenating-two-stdvectors

[vodoanhoanglong]

https://github.com/vodoanhoanglong/NCSKTBT_Long/blob/HEAD/vector.cpp

[ITHelpself]

https://www.geeksforgeeks.org/friend-class-function-cpp/

[ITHelpself]

[ITHelpself]

void concat(Array other);

[ITHelpself]

for(int element:elements){
     // todo: something
}