C-Language Process control structure-cyclic structure

Loop structure

Cyclic structure-while

while (condition)

{

Statement

}

Explanation: First determine whether the condition is established, the establishment of the execution, after the execution of the code again to determine whether the condition is established (judging conditions-"code block-" Judgment conditions-"execution code block ...) ）

1. First determine the operation of the loop (loop in vivo statement)

2. In determining the constraints, that is, the number of cycles required (cyclic body judging conditions)

3. Define a variable to record the number of cycles (defined as needed or undefined)

Tip: use If...break (jump out of the loop) or If...continue statement in the while loop (jump out of the loop to continue the next loop).

Loop structure-do while

Do

{

Statement

}while (condition)

Features: ADo While loop performs at least one loop body

Cyclic structure-for

For (statement 1, condition, statement 2)

{

Loop body

}

Statement 1: Typically an initialization statement

Statement 2: Typically an incremental statement (a statement executed after the loop body is executed)

"Contrast" for and while:

On the performance, the for loop slightly better because the while loop can use only external variables, and for loops to recycle variables in a timely manner.

Tips: Two code implementations of the Dead loop: while (1) for (;;)

C-Language Process control structure-cyclic structure