how to get the actual size of int array

[wijitha]

hi all

i have a integer array of fixed max size(assume 100). But the actual number of stored integers are less than max value(assume 50).Because it is change dynamically. How can i get the actual number of integers stored in the array.

regards
wijitha

[Nick Evan]

The best way is to keep track of how many integers you've stored with a counter-variable.

[wijitha]

no it difficult to do in my application as you suggest. Isn't a way like, how we get the length of char array[].

[Ancient Dragon]

That's the only way to do it when using basic C-style arrays. If you are writing a c++ program then use std::string instead of char* and you will be able to easily get the array size whenever you need it.

[Nick Evan]

No. Checking the length of a char-array means looking for the first '\0' (end of string). But there is no 'end of int'-int...
But you're using C++, so why not use an int-stack instead of an array?
example:

stack< int > myStack; //init the stack
for (int i = 0; i < 5; i++)
{
    myStack.push(i); //push on stack (add to array)
}
while (!myStack.empty()) //as long as there are ints on the stack
{
    cout << myStack.top() << endl; //show the number that's on top of the stack (last of the array)
    myStack.pop(); //remove the number from stack
}

I didn't test it, but you probably get the idea. This way you don't have to worry about how many ints are in an array.

[Nick Evan]

That's the only way to do it when using basic C-style arrays. If you are writing a c++ program then use std::string instead of char* and you will be able to easily get the array size whenever you need it.

Agreed, but the OP asked for an array of ints, not a char-array.