我的类的一个函数导致我的程序崩溃

Question

I'm doing a simple_vector class, wich can only contain doubles, using dynamic arrays. Somehow, my function push is making my program crash, and I don't know what's going on. When I call it, the console stays still for a moment and then immediately ends the main.

I have no idea...

void simple_vector::push(double value){
if (length == capacity){
    expandCapacity();
}
  array[length++] = value;
}

expandCapacity() duplicates the capacity of the array and copies its content.

It shouldn't enter the if, considering that I'm doing the push to an empty vector.

Answer 1

where is the line your program crashed.

first , assume that expandCapacity() crashing your program. i have no idea,, because there is no information about expandCapacity() fucntion. so you should ask your questrion cleary.

second , assume that array[length++] crahsing your program. then length value is bigger than your array size. In additional , array start from 0 index. so you declare 10 size array, then you can access array[0] ~ array[9].

thanks.