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分享请问%[^\n]是什么意思？
只见过%d,%s之类的，%[^\n]是什么意思，怎么理解？？
程序段如下：
FILE *fd;
char b[100];
fd = fopen(b, "r");
fscanf(fd,"%[^\n] ",b);
if(b[0]!='P'|| b[1] != '3')
{
printf("%s is not a PPM file!\n", b);
exit(0);
}
程序段如下：
FILE *fd;
char b[100];
fd = fopen(b, "r");
fscanf(fd,"%[^\n] ",b);
if(b[0]!='P'|| b[1] != '3')
{
printf("%s is not a PPM file!\n", b);
exit(0);
}
...全文
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yuhjnm_20001 2005-05-04
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mark
xjp6688 2005-05-04
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正则表达式
dvdface 2005-05-04
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微软就喜欢乱改
visual4825 2005-05-03
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第一次见
hszr99 2005-05-02
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长见识了
zhousqy 2005-05-02
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就是接收除\n之外的字符把。
DiyerYang 2005-05-02
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学习中
antijpn 2005-05-02
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一不小心用错马甲……
antijpn 2005-05-02
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就知道是scanf的东西表示以'\n'结尾的一个string，并且不包括'\n'
如果直接用%s的话，那么只要出现一个whitespace（空格、回车都是），那么字符串到此就为止了，而这样的话，只有\n才能终结这个字符串……
其实和fgets没有什么差别（但是fscanf这个应该会慢一点……）
如果直接用%s的话，那么只要出现一个whitespace（空格、回车都是），那么字符串到此就为止了，而这样的话，只有\n才能终结这个字符串……
其实和fgets没有什么差别（但是fscanf这个应该会慢一点……）
jerry 2005-05-02
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这样的用法还真没见过
WingForce 2005-05-02
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查到了
To read strings not delimited by space characters, a set of characters in brackets ([ ]) can be substituted for the s (string) type character. The corresponding input field is read up to the first character that does not appear in the bracketed character set. If the first character in the set is a caret (^), the effect is reversed: The input field is read up to the first character that does appear in the rest of the character set.
Note that %[a-z] and %[z-a] are interpreted as equivalent to %[abcde...z]. This is a common scanf function extension, but note that the ANSI standard does not require it.
－msdn
注意最后：This is a common scanf function extension, but note that the ANSI standard does not require it.
To read strings not delimited by space characters, a set of characters in brackets ([ ]) can be substituted for the s (string) type character. The corresponding input field is read up to the first character that does not appear in the bracketed character set. If the first character in the set is a caret (^), the effect is reversed: The input field is read up to the first character that does appear in the rest of the character set.
Note that %[a-z] and %[z-a] are interpreted as equivalent to %[abcde...z]. This is a common scanf function extension, but note that the ANSI standard does not require it.
－msdn
注意最后：This is a common scanf function extension, but note that the ANSI standard does not require it.
llf_hust 2005-05-02
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不知道
chunhai12 2005-05-02
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不知道，没见过
期待高手出现
期待高手出现
WingForce 2005-05-02
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看着象正则表达式。。。
不知道，没研究过
期待高手出现
不知道，没研究过
期待高手出现
