从键盘输入20个数，并将其中最大的和最小的显示出来。

dim a(1 to 10)
for i=1 to 20
input a(i)
next i
for i=1 to 20
if a(i)<min then min=a(I)
if a(i)>max then max=a(I)
next i
print "最小数“；min
print "最大数“；max
或者：
DEFINT A-Z
DIM a(10)
FOR i = 1 TO 10
PRINT i;
INPUT a(i)
s = s + a(i)
NEXT
DIM b(s)
FOR i = 1 TO 20
b(a(i)) = a(i)
NEXT
FOR i = 1 TO s
DO WHILE b(i) > 0
PRINT b(i)
EXIT FOR
LOOP
NEXT
FOR i = s TO 1 STEP -1
DO WHILE b(i) > 0
PRINT b(i)
EXIT FOR
LOOP
NEXT
END
没运行，不知道对不对

不太明白你这是什么意思，你是想要一段程序吗？一个简单的C就可以搞定的