末尾带有垃圾字符的字符串数组 [英] string array with garbage character at end

问题描述

我有一个char数组缓冲区，用于存储用户将要输入的字符.我的以下代码可以运行，但是有一些我无法弄清的故障:

I have a char array buffer that I am using to store characters that the user will input one by one. My code below works but has a few glitches that I can't figure out:

1. 当我执行printf来查看Buffer中的内容时，它确实填满了，但是最后我得到了垃圾字符
2. 即使被声明为char Buffer [8]，它也不会停止在8个字符处；

有人可以向我解释发生了什么，也许我该如何解决?谢谢.

Can somebody please explain to me what is going on and perhaps how I could fix this? Thanks.

char Buffer[8]; //holds the byte stream
int i=0;

if (/* user input event has occurred */) 
{
        Buffer[i] = charInput;
        i++;

        // Display a response to input
        printf("Buffer is %s!\n", Buffer);

}

输出:

tagBuffer is 1┬┬w!
tagBuffer is 12┬w!
tagBuffer is 123w!
tagBuffer is 1234!
tagBuffer is 12345!
tagBuffer is 123456=!
tagBuffer is 1234567!
tagBuffer is 12345678!

tagBuffer是123456789！

tagBuffer is 123456789!

推荐答案

您必须以\ 0字符结束字符串.这就是为什么它们被称为零终止字符串.

You have to end the string with a \0 character. That's why they are called zero terminated strings.

明智的是分配1个额外的char来容纳\ 0.

It is also wise to allocate 1 extra char to hold the \0.

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