question in array

[noobinprogramming]

question can how can i add new elements in an array that already has existing elements?? im adding strings to the array btw

[Repeater]

You can't.

If you have an array of size X, and you want to add a new element to it so that now the array is size X+1, you can't.

You have to create a new array of size X+1, and copy things over.

This being C++ and you being a beginnner, don't use arrays. Don't use arrays. Don't use arrays. Don't use arrays. Don't use arrays.

You're looking for a vector<string>, and the vector insert function ( http://www.cplusplus.com/reference/vector/vector/insert/ )

[keskiverto]

Add to end of vector http://www.cplusplus.com/reference/vector/vector/emplace_back/
That is more efficient than inserting into the middle.

[noobinprogramming]

but for example i have an array size of 15 and i put 5 values set in. then i need to add more via user input how do i do that?

[fiji885]

You can use a for loop for that and a count variable to keep track of where you're at. You'd probably be more interested in vectors, however.

[noobinprogramming]

cause i need to make a program that has 5 default driver license and i need to add more but i dont know how would i do it

[Repeater]

You can set elements of an array at any time.

array[5] = someNewValue; // set the 6th element of the array
array[6] = someOtherValue; // set the 7th element of the array 

[keskiverto]

constexpr size_t Capacity = 15;
size_t size = 0;

std::string words [Capacity];

// put 5 values:
std::string input;
while ( size < 5 and size < Capacity and std::cin >> input ) {
  words[ size++ ] = input;
}

// add another word
if ( size < Capacity ) {
  words[ size++ ] = "hello";
}

// show words
for ( size_t w=0; w < size; ++w ) {
  std::cout << words[ w ] << '\n';
}

Technically we do not add any strings; the array has 15 strings all the time. We simply update some strings and care only about the size first strings.

Vectors are more convenient:

std::vector<std::string> words;
words.reserve(15); // optional
// words is still empty. 0 strings in it.

// put 5 values:
std::string input;
while ( words.size() < 5 and std::cin >> input ) {
  words.emplace_back( input );
}

// add another word
words.emplace_back( "hello" );

// show words
for ( auto w : words ) {
  std::cout << w << '\n';
}