Edit with union struct
Merge pull request #11 from kenmunyap/master

update
add k, s, n, ns, fa, fsfd, fda, fba
Merge pull request #12 from shyanfeng/master

add k, s, n, ns, fa, fsfd, fda, fba
test file
Merge pull request #13 from shyanfeng/master

test file
Halfway 2nd merging, Interpret
fixed
Tested with all function in Intepret
Merge pull request #14 from shyanfeng/master

fixed
Done first test, full program
check interpeter