使用 goto 有什么问题? [英] What is wrong with using goto?

问题描述

<块引用>

可能的重复:
编程在当时是一场革命.

goto 在一些地方是合适的，例如跳出嵌套循环.

Possible Duplicates:
Why is it bad to use goto?
GOTO still considered harmful?

I was ramdomming through xkcd and saw this one (if also read some negative texts about them some years ago):

What is actually wrong with it? Why are goto's even possible in C++ then?

Why should I not use them?

解决方案

Because they lead to spaghetti code.

In the past, programming languages didn't have while loops, if statements, etc., and programmers used goto to make up the logic of their programs. It lead to an unmaintainable mess.

That's why the CS gods created methods, conditionals and loops. Structured programming was a revolution at the time.

goto's are appropriate in a few places, such as for jumping out of nested loops.

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