Initialize a std::vector of structures to zero

I am guaranteed to initialize a vector of struct with each element initialized to zero with that code ?

#include <vector>

struct A {
    int a, b;
    float f;
};

int main()
{
    // 100 A's initialized to zero (a=0, b=0, f=0.0)
    // std::vector<A> my_vector(100, {}); does not compile
    std::vector<A> my_vector(100, A{});
}

>Solution :

Yes it is guaranteed since A{} is value initialization and from cppreference:

Zero initialization is performed in the following situations:

• As part of value-initialization sequence for non-class types and for members of value-initialized class types that have no constructors, including value initialization of elements of aggregates for which no initializers are provided.

You can also use:

std::vector<A> my_vector(100, {0,1,1});