01 Oct The functions fscanf and fgetc input data from files.
1. The functions fscanf and fgetc input data from files.
2. Each data file must have an internal and an external name.
3. The file open mode “w” opens a file for writing.
4. We can use the fprintf function to write data into a text file.
5. Assume that value is a variable of type int, the function call fscanf (stdin, “%d”, &value); is correct.
6. fscanf( ) and fprintf( ) are declared in the standard header file stdlib.h
7. A text file is terminated by EOF.
8. The statement ifp = fopen(My_file”, “r”); opens a file for reading:
9. The function sprintf( ) writes characters to a string.
10. When a text file is opened, we have access to it at its beginning or end.
11. The main difference between scanf and sscanf is that sscanf gets its input from the string variable, which is its first parameter, whereas scanf gets its input from the standard input device.
12. The standard output function sprintf behaves like printf except it stores the output in its first parameter, which is a string variable.
13. The statement fprintf (test_scores, “%d”, score); writes a datum to a file named test_scores that has been opened in output mode.
14. It is possible to reopen in input mode a file that has been opened in output mode without closing it.
15. If the file open mode for a data file is “w” an input statement referencing the file will read a datum from it.
16. The output of a computer program can be directed to the standard output device, which is usually the monitor screen.
17. printf (“%d %d”, a; b); is syntactically legal.
18. scanf (“Enter a value for x: “, c1); is syntactically correct.
