CODEWITHSUNDEEP
c++
user9183395
user9183395

Reputation:

How to add element to last of array in c++

How to add element to last of array in c++?

int a[100] = {4,5}

How to add 6 to a[], then add 7 to a[]?

Upvotes: 0

Views: 1646

Answers (3)

Ron
Ron

Reputation: 15501

You have an array of 100 elements initialized by an initializer list {4, 5}. This means a[0] is initialized to 4, a[1] is initialized to 5 and all other array elements are initialized to 0. Just because there are two elements in the initializer list doesn't mean there is an end of array after the second element. There are 98 more array elements, all set to the value of 0. Your array size is fixed. It's 100 elements. If you want a container that dynamically changes its size, use std::vector instead.

Upvotes: 4

user11956505
user11956505

Reputation:

Your using a C-style array which are fixed size, so either just replace the value at the next index - or use std::vector which is dynamic size (https://en.cppreference.com/w/cpp/container/vector)

Upvotes: 0

Paul Evans
Paul Evans

Reputation: 27567

Looks like, as mentioned in the comments, you're looking for a std::vector:

std::vector<int> a{4, 5};
a.push_back(6); // a now {4, 5, 6}
a.push_back(7); // a now {4, 5, 6, 7}

Upvotes: 2

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