026.Ada语言的定点类型_ada语言 : constant-优快云博客

本文探讨了Ada语言中自定义类型MY_FIXED和ANGLE的使用，包括它们的范围、精度以及基本算术运算。展示了如何通过Ada.Text_IO库进行不同类型的数据输入输出，并详细解释了类型转换和属性查询的方法。

with Ada.Text_IO;
use Ada.Text_IO;

procedure Fixed is
   
   COARSE_PI : constant :=3.15;
   
   type MY_FIXED is delta 0.1 range -40.0..120.0;
   type ANGLE is delta 0.05 range -COARSE_PI..COARSE_PI;
   
   Theta,Omega,Phi:ANGLE:=0.50;
   FUNNY_VALUE:MY_FIXED;
   
   package Int_IO is new Ada.Text_IO.Integer_IO(Integer);
   use Int_IO;
   package Fixed_IO is new Ada.Text_IO.Fixed_IO(MY_FIXED);
   use Fixed_IO;
   package Fixed2_IO is new Ada.Text_IO.Fixed_IO(ANGLE);
   use Fixed2_IO;
   package Flt_IO is new Ada.Text_IO.Float_IO(Float);
   use Flt_IO;
   
begin
   
   Put("Theta starts off with the value");
   Put(Theta,5,2,0);
   New_Line(2);
   
   Theta:=Omega+Phi;
   Theta:=Omega-Phi;
   Theta:=5*Omega-2*Phi;
   Theta:=ANGLE(3*Omega/Phi);
   Theta:=abs(Omega-3*Phi);
   
   FUNNY_VALUE:=5.1;
   for Index in 1..10 loop
      Put("Funny_Value is now");
      Put(FUNNY_VALUE,5,1,0);
      Put(FUNNY_VALUE,5,5,0);
      FUNNY_VALUE:=MY_FIXED(FUNNY_VALUE*MY_FIXED(1.1));
      New_Line;
   end loop;
   
   New_Line;
   Put("MY_FIXED'delta=");
   Put(MY_FIXED(MY_FIXED'Delta)); --
   New_Line;
   Put("MY_FIXED'FIRST = ");
   Put(MY_FIXED'FIRST);
   New_Line;
   Put("MY_FIXED'LAST =  ");
   Put(MY_FIXED'LAST);
   New_Line;

end Fixed;