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ANSI C µÄ¿âº¯Êý¶¼Äܹ»ÔÚ LinuxÏÂʹÓÃ.
#include <stdio.h>
FILE *fopen(const char *path, const char *mode);
The argument mode points to a string beginning with one of the following sequences (Additional characters may follow these sequences.):
r Open text file for reading. 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 Truncate file to zero length or create text file for writing. The stream is positioned at the beginning of the file.
w+ Open for reading and writing. The file is cr
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