ARGS
Command Line Argument Retrieval

ARGS is a C++ program which demonstrates the retrieval of command line arguments.

This shows how a program can count and retrieve the individual command line arguments with which it was invoked. Thus, if our executable is called fu and we invoke it with the command

        fu man chu
      

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

ARGS is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Source Code:

ARGS is a program which reports the command line arguments with which it was invoked.

• args.cpp, the source code;
• args.txt, the result of the command "args 17 apple 3.14159 > args_output.txt";

ARGS_TO_STRINGS shows that the command line arguments can easily be converted to C++ strings.

• args_to_strings.cpp, the source code;
• args_to_strings.txt, the result of the command "args_to_strings bob ted fred";

PRIME_SUM is a program which expects one command line argument, an integer N. It reads N, computes the sum of the prime numbers up to N, and prints it out. The program demonstrates how a command line argument, which is a STRING, can be converted to an INTEGER, using the function atoi.

• prime_sum.cpp, the source code;
• prime_sum.txt, the result of the command "prime_sum 1000 > prime_sum_output.txt";

You can go up one level to the C++ source codes.