Keith Robison made such a version available at one time called molbio++,
but the 1st few google hits were 404. I have a copy somewhere if you can't
find it on an archive.
molbio++ is a C++ library for molecular biosequence analysis. Major
features include:
classes and services for
reading and writing sequence data in the following formats:
Genbank Flatfile
EMBL / SwissProt
GCG / Wisconsin
Fasta / Pearson
PIR
NCBI Retrieve Server (read-only)
limited parsing of fields and features in biosequence files
storing amino acid or nucleic acid sequences
iterating over a biosequence
calculating and storing counts or frequencies of amino acids or
nucleotides
device-independent graphics, via GCG's FIGURE program
translating nucleotide sequences into proteins using the universal
genetic code or
modifications thereof.
parsing BLAST output
calculating pI and molecular weight of proteins
amino acid hydropathy values of Kyte & Doolittle
ftp from golgi.harvard.edu (128.103.161.55)
in pub/CONTRIBUTIONS/molbio++