Functions

C programs are built from functions. Each function takes a number of arguments and can optionally return an answer. There is no concept of objects as used in Java. The function called to start a program is called main(). main() takes as argument an array of strings specifying the command-line arguments used to start the program. For instance, if you type man strlen, man’s main function will see numberOfArguments as 2 and arguments as {"man", "strlen"}:

void main(int numberOfArguments, char* arguments[])
{
  // Code ...
}