Simple question about standard input / output

badapple

Will ((ch = getchar ())! = EOF) {
      printf ("% c", ch);
    }
What character is EOF? Why can't you stop.
And what is the value of the newline key (or how to represent the newline key)?

帝王至尊

That should be the eof judgment when reading the file

wofung

Change (ch = getchar ())! = EOF to
(ch = getchar ())! = '\n'

EOF is used to read files, such as text.txt
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
void main () {
    ifstream file;
    string line;
    file.open ("text.txt");
    int row = 1;
    while (! file.eof ()) {
        getline (file, line);
        cout << row << "" << line;
        row ++;
        cout << endl;
    }
    file.close ();
    system ("pause");
}

china1839

while ((ch = getchar ())! = ‘\n’) //\n means a newline
{
      printf ("% c", ch);
}

lklklk

The landlord tried it with Ctrl + z and stopped.