Original
Assignment statements
An assignment statement has the
form
variable := expression
where variable is any variable
reference including a variable, variable typecast, dereferenced pointer, or
component of a structured variable and expression is any assignment-compatible
expression. (Within a function block, variable can be replaced with the
name of the function being defined. See Procedures and functions.)
The := symbol is sometimes called the assignment operator.
An assignment statement replaces
the current value of variable with the value of expression. For
example,
I := 3;
assigns the value 3 to the variable I. The
variable reference on the left side of the assignment can appear in the
expression on the right. For example,
I := I + 1;
increments the value of I. Other assignment
statements include
X := Y + Z;
Done := (I >= 1) and (I <
100);
Hue1 := [Blue, Succ(C)];
I := Sqr(J) - I * K;
Shortint(MyChar) := 122;
TByteRec(W).Hi := 0;
MyString[I] := 'A';
SomeArray[I + 1] := P^;
TMyObject.SomeProperty := True;
See also
译文
赋值语句
赋值语句具有如下形式
variable := expression
这里的variable是任何一个变量引用，包括变量、变量类型转换、解除参照的指针或结构变量的组成部分，expression是任何赋值兼容的表达式。（在函数块中，variable可以被所在定义函数的函数名代替，见过程和函数。）符号 := （冒号之后紧随等号）有时也叫做赋值运算符。
赋值语句用表达式expression的值替换变量variable当前的值。例如，赋值语句
I := 3;
把数值3赋给变量
I 。赋值语句左边的变量引用可以出现在右边的表达式中，例如，赋值语句
I := I + 1;
增加了变量 I 的值。下面是赋值语句的范例：
X := Y + Z;
Done := (I >= 1) and (I <
100);
Hue1 := [Blue, Succ(C)];
I := Sqr(J) - I * K;
Shortint(MyChar) := 122;
TByteRec(W).Hi := 0;
MyString[I] := 'A';
SomeArray[I + 1] := P^;
TMyObject.SomeProperty := True;