vector push_back memory access denied in Visual Studio

Question

#include <stdio.h>
#include <vector>

using namespace std;

int main()
{
    vector<int> numbers;

    numbers.resize(10001);
    for (int i = 0; i < 10000; i++)
    {
        numbers.push_back(1);
    }

    return 0;
}

If I put more than 5000 1s in the vector, I get the following error, I don't understand.

There is no doubt about it other than the memory overflow. But int type = 4 bytes, so 4byte * 10000 = 40000byte 0.04mb

Why am I getting an error?

Answer 1

The error seems unrelated to the code that you've shown.

Now, looking at your code there is no need to use resize and then using push_back as you can directly create a vector of size 10001 with elements initialized to 1 as shown below:

std::vector<int> numbers(10001,1);// create vector of size 10001 with elements initialized to 1

---

Or you can used std::vector::reserve instead of std::vector::resize, though this is totally unnecessary as you can use the first method shown above.

vector<int> numbers;

numbers.reserve(10001); //use reserve instead of resize
for (int i = 0; i < 10000; i++)
{
    numbers.push_back(1);
}