The user wants to obtain the usage statement for the CCA.
cca -h
The usage statement is printed to STDOUT
cca usage:
cca <option>* -f infile
cca -h | -help | -?
option ::= -{CcDdEeLlTtVv}+
| -g[p|1|2|4|8|16] <graphfile>
| -o <outfile>