is the abbreviation of argc-argv. We can find paragraph from Program startup in n1570 written as follow:

The function called at program startup is named main. The implementation declares no prototype for this function. It shall be defined with a return type of int and with no parameters:
int main(void) { /* ... */ }
or with two parameters (referred to here as argc and argv, though any names may be used, as they are local to the function in which they are declared):
int main(int argc, char *argv[]) { /* ... */ }
or equivalent; or in some other implementation-defined manner.

Argc means "argument count", and argv means "argument vector". Combined argc and argv means input. Each of code is an individual module, given input, do some process, and return the result. It is straightforward and beautiful, just like my life.

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Someone interested in Unix Network Programming, Natural Language Processing, Machine Learning, Artificial Intelligence, Information Retrieval and Operation System, who learns code from Introduction to Algorithms but not proficient in algorithms, always reads Computer System: A Programmer's Perspective but still so weak.

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