第二课程序输入和输出

In chapter 1, we have learn some data types:
我們在第一課已學會了幾種數據類型：
2.1 ( writeln ) Statement 語句
The format of the statement is as follow:
Output list can be constant, variable or expressions
輸出表可以是常量、變量或表式
注意：符號「:= 」的意思是「取數值」。

2.2 ( write ) Statement 語句
The format of the statement is as follow:
The "write" statement is similar to the statement "writeln" except the cursor does not go to the next line after displaying the output. (↵: line feed)
「write」的語句與「writeln」很相似，唯一分別是當輸出顯示後，指標不會跳到另一行。

(↵：換行)
Example 例子Output result輸出結果
Program UseWrite;
begin
writeln( '123' ); write( 'A' );
write( 'a' );
readln()
end. 123 Aa
2.2 Formatting Output 輸出的格式制定
3. Input Statement 輸入語句
3.1 ( Readln ) Statement 語句
The standard form of statement is as follow:
以下是其標準語句格式：
Input variable can be integer, real number, character or string-type variable
輸入變量可以是整數、實數、字串或字符類型的變量
I. readln statement is used to read data from the ( keyboard ) or ( data files ) and assign
it to the corresponding variable.
readln語句是用作讀取( 鍵盤)或( 數據檔案)輸入的數據，並分配給對應的變量。

II. Generally, the data entered and the variable to be assigned must have same type.
通常，所輸入的數據及其被分配的變量需要是同類。

A. Only ( integer ) can be assigned to a real type data.
只有( 整數) 可以分配給實數類。

One "readln" statement can be read more than one data value at the same time. But the value must be separated by space:
一句"readln"的語句可同時輸入多個一個數據。

但數據之間必要以空格分開：
It is also possible to read different types of data at the same time:
不同的數據類型亦可以以同一句輸入：
Note: When reading character type data, the space is also regards as a character. 注意：當讀取字符類數據時，空格也會被當作一個字符。

3.2 ( Read ) Statement 語句
It is similar to readln statement, the only difference is as follow:
它與readln語句相似，以下是唯一的不同：
Notes: 注意：<elon> (end of line): is a character produced when ENTER key is pressed.
是當按下ENTER鍵所輸出的字符
. blank space 空白格。