C + + file operation learning

1. FStream The ability to read and write text
2. ostream can only write to text
3. IStream can only read text

Let 's take a look at the member functions of the Stream class libraryput (char c) outputs one characterWrite (const char * str,int N) outputs a string Get (char c) gets a charactergetline (char *buf,int n,char deline= ' \ n ') reads a line of characters the last parameter is the terminating flag characterRead (char *buf, int n) reads a number of characters Ios::in Read OnlyIos::out only outIos::app Appendios::ate at end of file when openIos::trunc If there is a file then empty, not exist then createios::binary opens in binary mode ------------------------------------the best way to profile is-----------------------------------writes written out of file stream pairs

2. int a;
4. string str;
6. istream file("123.txt",ios::in|ios::out);
10. file>>a;
12. file>>str;
14. //如果是写入的话
16. file<<a;
18. file<<str;
22. // 文件流一般是 遇到空格 或者 换行符 就会终止读取

From for notes (Wiz)

C + + file operation learning