matlab fopen a+ r+ w+中的+号代表什么意思呀
r+: Open for reading and writing. The stream is positioned at the beginning of the file.
w+:Open for reading and writing. The file is created if it does not exist, otherwise it is truncated. The stream is positioned at the beginning of the file.
r+: Open for reading and writing. The stream is positioned at the beginning of the file.
w+:Open for reading and writing. The file is created if it does not exist, otherwise it is truncated. The stream is positioned at the beginning of the file.
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