C++ I/O

Constructors     
bad()          true 
clear()        
close()       
eof()             true 
fail()          true 
fill()          
flags()   flags 
flush()       
gcount()                 
get()      
getline()        
good()             true 
ignore()             
open()         
peek()            
precision()      
put()     
putback()          
rdstate()        
read()       
seekg()               
seekp()               
setf()        
sync_with_stdio()    I/O   
tellg()            
tellp()            
unsetf()        
width()       
write()     

　

#include <fstream>
int main()
{
    std::ifstream fin;
    std::ofstream fout;
    fin.open("in.txt",std::ios::in);
    fout.open("out.txt",std::ios::app);
    char temp;
    while( fin >> temp )
    {
        fout<<temp<<std::endl;
    }
    fin.close();
    fout.close();
    return 0;
}