Programming

 1 #include <stdio.h>
      2 #include <iostream>
      3
      4 #define BUFSIZE 1
      5
      6 using namespace std;
      7
      8 int main()
      9 {
     10         int f1, n;
     11         char buf[BUFSIZE];
     12         int i = 0;
     13         f1 = open("typing.txt", 0);
     14
     15         while((n = read(f1, buf, BUFSIZE)) > 0)
     16         {
     17                 cout << buf[0];
     18         }
     19 return 0;
     20 }

Open.cpp: In function âint main()â:
Open.cpp:13:27: error: âopenâ was not declared in this scope