Declaring array with an initial value in C++

If you declare an array like

int myArr[10] = {};

It will initiate your array with all values

int myArr[10] = {-1};

This will initiate your array with first element -1 and the rest.

If you want to fill your array with specific length and number, you should use native std::fill or std::fill_n functions. For more information about those functions and use please visit C++ Reference.