j + k = jk (just kidding)

txlyre f5832813ba add it; upd help; fix scanwith 7 月之前
.gitignore dcd441be2a initial 7 月之前
build.sh dcd441be2a initial 7 月之前
jk.c f5832813ba add it; upd help; fix scanwith 7 月之前