COMBINATION_LOCK is a FORTRAN90 program which simulates the process of determining the combination of a lock.
This program demonstrates the method of exhaustive search, that is, it searches for an answer by trying every possibility. This requires a way of logically ordering the possibilities.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
COMBINATION_LOCK is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.
COMBO, a FORTRAN90 library which includes many combinatorial routines.
PARTITION_PROBLEM, a FORTRAN90 library which seeks solutions of the partition problem, splitting a set of integers into two subsets with equal sum.
SATISFY, a FORTRAN90 program which demonstrates, for a particular circuit, an exhaustive search for solutions of the circuit satisfiability problem.
SUBSET, a FORTRAN90 library which enumerates combinations, partitions, subsets, index sets, and other combinatorial objects.
SUBSET_SUM, a FORTRAN90 library which seeks solutions of the subset sum problem.
You can go up one level to the FORTRAN90 source codes.