#DIFFERENCE BETWEEN ISTREAM AND IFSTREAM FULL#

(8) istream& ignore(int nCount = 1, int delim = EOF) (7) istream& putback(char c) //put the character c back into the input stream (6) int peek() //returns the next character, but does not remove it from the stream (5) bool eof() //Determine whether the input stream is over (4) You can use if(!cin.getline(.)) to determine whether the input is over The result is: although this reading has been completed, the subsequent reading will fail

If the number of characters before' ' or delim in the input stream reaches or exceeds bufSize, it will cause an error in reading. Neither'n' nor delim will be read into buf, but will be taken from the input stream. (3) Both functions will automatically add/0 at the end of the data read in buf. Read bufSize-1 characters from the input stream to the buffer buf, or read until the delim character is sprayed (whichever comes first) (2) istream& getline(char* buf, int bufSize, char delim) Read bufSize-1 characters from the input stream to the buffer buf, or read until it hits' ' (whichever comes first) (1) istream& getline(char* buf, int bufSize)

#DIFFERENCE BETWEEN ISTREAM AND IFSTREAM FULL#

The difference between cerr and clog is that cerr does not use a buffer, and outputs information directly to the display the information output to clog will be stored in the buffer first, and will be output to the screen when the buffer is full or refreshedĤ Output redirection example (see shuchu1.cpp in this project) clog corresponds to the standard error output stream, used to output error information to the screen cout corresponds to the standard output stream, used to output data to the screen, and can also be redirected to write data to a file Cin corresponds to the standard input stream, used to read data from the keyboard, and can also be redirected to read data from a file clog is connected to the standard error output device cerr is connected to the standard error output device Output stream object: cout is connected to the standard output device Input stream object: cin is connected to the standard input device

Difference between istream and ifstream