how to initialize vector in c++ with all elements 0
To initialize a vector in C++ with all elements set to 0, you can use the std::vector
constructor along with the std::vector
's size_type
constructor overload. This constructor allows you to create a vector with a specified size and value for each element.
Here is an example of how to initialize a vector with all elements set to 0:
#include <vector>
int main() {
// Initialize a vector with 5 elements, all set to 0
std::vector<int> myVector(5, 0);
return 0;
}
In the example above, we include the <vector>
header to use the std::vector
class. We then define the main
function, which is the entry point of a C++ program.
Inside the main
function, we declare a variable myVector
of type std::vector<int>
. We initialize myVector
with a size of 5 and each element set to 0. The 5
specifies the size of the vector, and the 0
is the value that each element will be initialized with.
By using this constructor, all elements in myVector
will be set to 0.
Note that the std::vector
class is part of the Standard Template Library (STL) in C++. It provides a dynamic array-like container that can resize itself automatically as elements are added or removed. The constructor used in this example is just one of the many ways to initialize a vector in C++.