4add\addspr.sp
....\addspr.tpr
....\ex6.sd0
....\ex6.sdb
....\ex7.sd0
....\ex7.sd1
....\ex7.tdb
....\ex7.tdo
....\sedit.sd0
....\sedit.sd1
....\sedit.sdo
....\ex7.sdo
....\ex7.sdb
....\adder4.tdb
....\fulladder4.tpr
....\fulladder4.sp
....\adder4.sd0
....\add4spr.tpr
....\adder4.tdo
....\一位全加器.bmp
....\adder4.bmp
....\adder4.sdb
....\add.tpr
....\e6.sdb
....\sedit.sdb
4add