Initializing Primitive Array to One Value

Question

Is there a way to initialize an array of primitives, say a integer array, to 0? Without using a for loop? Looking for concise code that doesn\'t involve a for loop.

Answer 1

Yes, it is possible. The initialization method depends on the context.

If you are declaring a static or local array, use = {} initializer

int a[100] = {};  // all zeros

If you are creating an array with new[], use () initializer

int *a = new int[100](); // all zeros

If you are initializing a non-static member array in the constructor initializer list, use () initializer

class C {
  int a[100];

  C() : a() // all zeros
  {
    ...
  }
};