正确的方法来清空一个C字符串 [英] Proper way to empty a C-String
问题描述
我已经工作在C项目,需要我用绳子一大堆乱七八糟左右。通常情况下,我做的节目在C ++中,所以这不仅仅是说的String.Empty()有一点不同。
我不知道什么是空的C.字符串这将是它的正确方法?
缓冲区[80] =你好!世界\\ n;// ...的strcpy(缓冲液,);
这取决于你的意思是空的东西。如果你只是想要一个零长度字符串,那么你的例子会工作。
这也将工作:
缓冲[0] ='\\ 0';
如果你想零字符串的全部内容,可以这样来做:
memset的(缓冲,0,strlen的(缓冲));
但这只会调零到第一个NULL字符工作
如果该字符串是一个静态数组,你可以使用:
memset的(缓冲,0,sizeof的(缓冲));
I've been working on a project in C that requires me to mess around with strings a lot. Normally, I do program in C++, so this is a bit different than just saying string.empty().
I'm wondering what would be the proper way to empty a string in C. Would this be it?
buffer[80] = "Hello World!\n"; // ... strcpy(buffer, "");
It depends on what you mean by "empty". If you just want a zero-length string, then your example will work.
This will also work:
buffer[0] = '\0';
If you want to zero the entire contents of the string, you can do it this way:
memset(buffer,0,strlen(buffer));
but this will only work for zeroing up to the first NULL character.
If the string is a static array, you can use:
memset(buffer,0,sizeof(buffer));
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