C ++默认数组大小使用命令行参数覆盖

Question

I saw one question on similar lines Specify Array from Command Line Argument

Although my problem is bit different.

I have multiple files implementing arrays of same size (NOC_SIZE). My program has a default mode and a user mode (command line arguments). I gave the 'unsigned int NOC_SIZE = 16;' line in my code before the start of main function. In another header file I declared a struct (noc_package) with parameter 'static unsigned int NOC_SIZE;'. This header file in included in all files where ever required.

But in the files where I have declared an array (int arr[noc_package :: NOC_SIZE]) it gives an error saying array bound not an integer.

Can somebody suggest a way around this?

Thank you.

Answer 1

C++ doesn't support variable-length arrays.

You're better of using an std::vector instead:

std::vector<int> arr(noc_package::NOC_SIZE);