Question

在vfp中，编写一个程序，使输入四个数，从大到小排序

Answer 1

input "a=" to a
input "b=" to b
input "c=" to c
input "d=" to d
if a>b then
t=a
a=b
b=t
endif
if a>c then
t=a
a=c
c=t
endif
if a>d then
t=a
a=d
d=t
endif
if b>c then
t=b
b=c
c=t
endif
if b>d then
t=b
b=d
d=t
endif
if c>d then
t=c
c=d
d=t
endif
?a," ",b," ",c," ",d

追问

then的作用

追答

then的作用

请查阅书上if ...then...语句的使用格式。