编码的奥秘二

1，算术平方

begin

  real     a,  b;

  print ('Enter  a  number: ');

  read (a);

 

 if   a< 0 then

   print ('Sorry, the number was negative.');

else

 begin

   b = sqrt  (a);

   print ('The square root of', a, 'is', b);

end

end

2,  3-99间奇数的立方值

begin

  real  a, b;

 for  a :=3  step 2  until  99  do

begin

  b :=a× a× a;

 print ('The  cube of', a,' is', b);

end

end

3, 假设程序用计算3、5、7和9的立方

begin

 real a, b;

 for a := 3, 5, 7, 9do

begin

b := a× a× a;

print (' The  cube of ', a, 'is', b);

end

end