How do you use the C++ standard library?
The C++ Standard Library is a standardized set of library functions and classes provided by the C++ language, which includes various commonly used functionalities and data structures. To use the C++ Standard Library, follow these steps:
- Include header files: Before using the necessary library functions or classes, it is required to include the corresponding header files. Header files for the C++ standard library typically end with .h, such as
. - To simplify the code, you can use the using statement or prefix the namespace to avoid repeating the namespace name. For instance, using namespace std; imports functions and classes from the std namespace into the current scope.
- Use library functions or classes: Use the member functions of a library class or directly call library functions to perform the desired operations. For example, you can use the << operator of the cout object to print output, or use the push_back() function of the vector class to add elements to a container.
Here is a simple example using the C++ standard library to print “Hello, World!”:
#include <iostream>
int main() {
std::cout << "Hello, World!" << std::endl;
return 0;
}
In the above example, the
