![]() ![]() These files are mainly imported from an outside source into the current program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. #include Directive in C#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. So main is an important function in c, c++ programming language. Its first function or entry point of the program from where program start executed, program's execution starts from the main. ![]() Main() is a system (compiler) declared function whose defined by the user, which is invoked automatically by the operating system when program is being executed. Hence we can say that main() in c programming is user defined as well as predefined because it's prototype is predefined. Main() function is a user defined, body of the function is defined by the programmer or we can say main() is programmer/user implemented function, whose prototype is predefined in the compiler. Thus the main function is always the first code executed when a program starts. ![]() The only difference is that the main function is "called" by the operating system when the user runs the program. Main() Function in CIn C, the "main" function is treated the same as every function, it has a return type (and in some cases accepts inputs via parameters). ![]()
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