ccs_io_test, a FORTRAN90 code which calls ccs_io() to read and write Compressed Column Storage (CCS) sparse matrix files.
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ccs_io, a FORTRAN90 code which reads and writes sparse linear systems stored in the Compressed Column Storage (CCS) format.
Test #1 and #2 write and read back the information for the "simple" 5x5 matrix with 12 nonzero entries. There are files associated with this.