C11 6.7.9 Initialization p19 covers this (my emphasis) The initialization shall occur in initializer list order, each initializer provided for a particular subobject overriding any previously listed initializer for the same subobject;151) all subobjects that are not initialized explicitly shall be initialized implicitly the same as objects that have static storage duration. Section 6.7.9 p10 … Read more
It’s allowed because the standard says so: C99 section 6.7.8, ยง14: An array of character type may be initialized by a character string literal, optionally enclosed in braces. Successive characters of the character string literal (including the terminating null character if there is room or if the array is of unknown size) initialize the elements … Read more
string[,] Tablero = new string[3,3]; You can also instantiate it in the same line with array initializer syntax as follows: string[,] Tablero = new string[3, 3] {{“a”,”b”,”c”}, {“d”,”e”,”f”}, {“g”,”h”,”i”} };
In some cases, you can use std::mem::MaybeUninit: use std::mem::MaybeUninit; fn main() { let mut ys: MaybeUninit<[i32; 1000]> = MaybeUninit::uninit(); } Removing the MaybeUninit wrapper via assume_init is unsafe because accessing uninitialized values is undefined behavior in Rust and the compiler can no longer guarantee that every value of ys will be initialized before it is … Read more
You asked for a non-vector solution but let’s go over it because you might have rejected it for the wrong reasons. You shouldn’t worry about performance because at the hands of any competent compiler it is going to have pretty much the same overhead as any other standard conformant solution. On the other hand, there … Read more
You’ll have to use memset: memset(board, 0, sizeof board);
In C++14 it can be easily done with a constexpr constructor and a loop: #include <iostream> template<int N> struct A { constexpr A() : arr() { for (auto i = 0; i != N; ++i) arr[i] = i; } int arr[N]; }; int main() { constexpr auto a = A<4>(); for (auto x : a.arr) … Read more
This is valid in C99. C99 standard supports variable sized arrays on the stack. Probably your compiler has chosen to support this construct too. Note that this is different from malloc and new. gcc allocates the array on the stack, just like it does with int array[100] by just adjusting the stack pointer. No heap … Read more
These are the current declaration and initialization methods for a simple array. string[] array = new string[2]; // creates array of length 2, default values string[] array = new string[] { “A”, “B” }; // creates populated array of length 2 string[] array = { “A” , “B” }; // creates populated array of length … Read more