When making a prototype, this can save a great deal of time, cash, and exertion that would regularly be spent on tooling the creation line and getting a get together cycle set up.
User can define his header files in the top of code by using #include
There are an aggregate of 49 header records in the Standard C++ Library. This incorporates 19 Standard C Library header documents.
Let us discuss some header files
"iostream" is used for standard input output library
"iostream" is used for using string in our code.
"Math.h is used to apply mathematical operations like square root.
"Fstream" is uded for file handeling in C++ program