chap7\add4_1.v .....\add4_2.v .....\add4_3.v .....\count4.v .....\full_add1.v .....\full_add2.v .....\full_add3.v .....\full_add4.v .....\full_add5.v .....\half_add1.v .....\half_add2.v .....\half_add3.v .....\half_add4.v .....\mux2_1a.v .....\mux2_1b.v .....\mux2_1c.v .....\mux4_1a.v .....\mux4_1b.v .....\mux4_1c.v .....\mux4_1d.v chap7