You are reading the sentence incorrectly. A program shall contain a global function called main, which is the designated start of the program. The standard is DEFINING the word “start” for the purposes of the remainder of the standard. It doesn’t say that no code executes before main is called. It says that the start … Read more
Per the SDL Windows FAQ: You should be using main() instead of WinMain() even though you are creating a Windows application, because SDL provides a version of WinMain() which performs some SDL initialization before calling your main code. If for some reason you need to use WinMain(), take a look at the SDL source code … Read more
In Java args contains the supplied command-line arguments as an array of String objects. In other words, if you run your program in your terminal as : C:/ java MyProgram one two then args will contain [“one”, “two”]. If you wanted to output the contents of args, you can just loop through them like this… … Read more
The java <class-name> command syntax First of all, you need to understand the correct way to launch a program using the java (or javaw) command. The normal syntax1 is this: java [ <options> ] <class-name> [<arg> …] where <option> is a command line option (starting with a “-” character), <class-name> is a fully qualified Java … Read more
The difference is one is the correct way to define main, and the other is not. And yes, it does matter. Either int main(int argc, char** argv) or int main() are the proper definition of your main per the C++ spec. void main(int argc, char** argv) is not and was, IIRC, a perversity that came … Read more
The overwhelming majority of the time, one of int main(void) or int main(int argc, char* argv[]) is what you need to use. In particular, if you’re writing a program that’s going to be compiled by any major compiler for running on a personal computer, with the full set of the C standard libraries, then you … Read more
EDIT This answer is not as complete as it could be since it doesn’t really address the strange sentence “or otherwise in some implementation-defined manner”. I have now written a more complete answer which also addresses C90, C11 and C++. END OF EDIT Here is what the C standard says (ISO C 9899:1999): 5.1.2.1 Freestanding … Read more
Why is the Java main method static?
When you use the java command to run a Java application from the command line, e.g., java some.AppName arg1 arg2 … the command loads the class that you nominated and then looks for the entry point method called main. More specifically, it is looking for a method that is declared as follows: package some; public … Read more
The main function must be declared as a non-member function in the global namespace. This means that it cannot be a static or non-static member function of a class, nor can it be placed in a namespace (even the unnamed namespace). The name main is not reserved in C++ except as a function in the … Read more