for语句的执行顺序

2007-09-08 10:58

The for statement is written:

for (e₁; e₂; e₃) statement

First, e₁, usually an assignment statement, is executed. Then e₂, usually a comparison, is evaluated. If false, the for-loop terminates. If true,statement is executed. Finally, e₃, usually an assignment statement, is executed, and control returns to evaluate e₂ again.
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for语句的书写格式：

for(e1;e2;e3)

statement

首先，运行e1,它通常是赋值语句，然后对e2求值，它通常是一个比较。如果e2的值为false,则结束循环。
如果e2的值为true,则执行statement。最后，执行e3，它通常是赋值语句，然后控制转移到对e2再次求值。