istream::get,getline函数与string getline区别 istream::read 和ostream::write
2011-07-20 16:15
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int get();从输入流中读取一个字符,转化成int返回
istream& istream::get ( char& c ); 从输入流中读取一个字符,保存到c中
istream& istream::get ( char* s, streamsize n );
从输入流中读取n-1个字符或者碰到结束符'\n'或者文件最后,但是'\n'不会从输入流中提取出来,最为下次读取的开始字符。在s最后加上一个'\0'
istream& istream::get ( char* s, streamsize n, char delim );
从输入流中读取n-1个字符或者碰到结束符delim 或者文件最后,但是delim 不会从输入流中提取出来,最为下次读取的开始字符.在s最后加上一个'\0'
istream& istream::getline (char* s, streamsize n );
istream& istream::getline (char* s, streamsize n, char delim );
与istream& istream::get ( char* s, streamsize n ); istream& istream::get ( char* s, streamsize n, char delim );
的区别是 结束符会从输入流中提取出来,但是不会存到s中。
string getline
istream& getline ( istream& is, string& str, char delim );
istream& getline ( istream& is, string& str );
函数的作用与
istream& istream::getline (char* s, streamsize n );
istream& istream::getline (char* s, streamsize n, char delim );
一样
istream& read ( char* s, streamsize n );
从输入流读取n个字符,或者碰到文件结束符 但是不在s最后加上'\0',所以不是cstring字符串
ostream& write ( char* s, streamsize n );
从输出流写入n个字符,s不需要是cstring字符串 即'\0'结束的字符串
istream& istream::get ( char& c ); 从输入流中读取一个字符,保存到c中
istream& istream::get ( char* s, streamsize n );
从输入流中读取n-1个字符或者碰到结束符'\n'或者文件最后,但是'\n'不会从输入流中提取出来,最为下次读取的开始字符。在s最后加上一个'\0'
istream& istream::get ( char* s, streamsize n, char delim );
从输入流中读取n-1个字符或者碰到结束符delim 或者文件最后,但是delim 不会从输入流中提取出来,最为下次读取的开始字符.在s最后加上一个'\0'
istream& istream::getline (char* s, streamsize n );
istream& istream::getline (char* s, streamsize n, char delim );
与istream& istream::get ( char* s, streamsize n ); istream& istream::get ( char* s, streamsize n, char delim );
的区别是 结束符会从输入流中提取出来,但是不会存到s中。
string getline
istream& getline ( istream& is, string& str, char delim );
istream& getline ( istream& is, string& str );
函数的作用与
istream& istream::getline (char* s, streamsize n );
istream& istream::getline (char* s, streamsize n, char delim );
一样
istream& read ( char* s, streamsize n );
从输入流读取n个字符,或者碰到文件结束符 但是不在s最后加上'\0',所以不是cstring字符串
ostream& write ( char* s, streamsize n );
从输出流写入n个字符,s不需要是cstring字符串 即'\0'结束的字符串
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