添加字符串末尾为空
我有一个声明为 char Sentence[100] 的字符串； 在一个循环中，我从 txt 文件中读取不同的句子，我试图这样做：
sentence = strtok (sentencefromtxtfile," ,.-");
//seperating word by word in a loop
我可以做到。但有一个小问题。假设sentecenfromtxtfile 的长度仅为10。示例：
sentencefromtxtfile ="John" ->如果为 NULL，则为 5 个字符。但strtok函数无法注意到NULL ch。所以我的句子变量是这样的：
John ÿ( ÕŒ•vÍ>È àı~øş( j (total 100 char)
那么我该如何解决这个问题呢？我的意思是，我可以调整句子的长度吗？因为它是固定的并且 100.. 无论如何，对不起我愚蠢的英语。我希望你们明白我的意思吗？提前致谢..
I have a string declared char sentence[100];
In a loop, I read different sentences from a txt file and I'm trying to do this:
sentence = strtok (sentencefromtxtfile," ,.-");
//seperating word by word in a loop
And I can do. but there is a little problem. Lets say the lenght of sentecenfromtxtfile is just 10. Example:
sentencefromtxtfile ="John" -> with NULL, it is 5 character. But strtok function cant notice the NULL ch. so my sentence variable is being like this:
John ÿ( ÕŒ•vÍ>È àı~øş( j (total 100 char)
so how can I fix that? I mean, can I adjust the length of the sentence ? cos it is fix and 100.. Anyway, sorry for my stupid english. I hope you guys got what I mean? thanks in advance..
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您可以在填充缓冲区之前使用
\0字符预填充缓冲区：这应该可以解决您的问题，因为
strtok()未触及的所有字符都将是NUL。You can prefill your buffer with
\0characters before populating it by issuing:This should solve your problem, since all the characters
strtok()leaves untouched will beNUL.char[100]是一个包含 100 个字符的数组，而不是字符串。您可以考虑使用std::string。char[100]is an array of 100 char's, not a string. You may consider usingstd::string.