fopen() 中的 "rb+" 和 "ab" 有什么区别？
What is the difference between "rb+" and "ab" in fopen()?
我不明白在 C 中使用 fopen() 时 "ab" 和 "rb+" 模式之间的区别。
为什么我会选择一个而不是另一个？
With the mode specifiers above the file is open as a text file. In
order to open a file as a binary file, a "b" character has to be
included in the mode string. This additional "b" character can either
be appended at the end of the string (thus making the following
compound modes: "rb", "wb", "ab", "r+b", "w+b", "a+b") or be inserted
between the letter and the "+" sign for the mixed modes ("rb+", "wb+",
"ab+").
来自 fopen documentation，我建议您在提问前阅读。它将为您提供大量有关可能参数、return 值、类似功能等的信息。
此外，来自同一文档：
"a" = append: Open file for output at the end of a file. Output operations always write data at the end of the file, expanding it. Repositioning operations (fseek, fsetpos, rewind) are ignored. The file is created if it does not exist.
"r+" = read/update: Open a file for update (both for input and output). The file must exist.
我不明白在 C 中使用 fopen() 时 "ab" 和 "rb+" 模式之间的区别。
为什么我会选择一个而不是另一个？
With the mode specifiers above the file is open as a text file. In order to open a file as a binary file, a
"b"character has to be included in the mode string. This additional"b"character can either be appended at the end of the string (thus making the following compound modes:"rb","wb","ab","r+b","w+b","a+b") or be inserted between the letter and the"+"sign for the mixed modes ("rb+","wb+","ab+").
来自 fopen documentation，我建议您在提问前阅读。它将为您提供大量有关可能参数、return 值、类似功能等的信息。
此外，来自同一文档：
"a"= append: Open file for output at the end of a file. Output operations always write data at the end of the file, expanding it. Repositioning operations (fseek,fsetpos,rewind) are ignored. The file is created if it does not exist.
"r+"= read/update: Open a file for update (both for input and output). The file must exist.