The C File Input/output and C Processor Directives Sample Codes Index Page

The following links provide C program example on how to use the C file input/output for opening, reading, writing, closing and processing the files. The second part demonstrates the program examples on how to use the C preprocessor directives.

C File Input/Output (The C file input/output program samples - printf(), scanf(), scanf_s() etc.)

1. Opening, reading, writing and closing a text file, block by block using fopen()/fopen_s(), fread() and fwrite() C functions

2. Opening and reading file content randomly and display it using fopen()/fopen_s(), fseek(), ftell() and fgets() C functions

3. Reading, writing, rewind the file pointer of the binary data file using fopen_s()/fopen(), fread(), fwrite() and rewind() C functions

4. How to use fopen() and fscanf()/fscanf_s() function to read from a file, process and write the result to another file

5. Redirecting the standard output to a text file C program example

6. Deleting a file using the remove() C function

7. Using rename() C function to change a file name

8. Copying a file C program example using the C file input/output functions

9. Opening file, reading and writing one line at a time using fputs()/fputws(), fopen()/fopen_s() and fgets()/fgetws() C functions

10. Reading and writing one character at a time using fopen()/fopen_s(), fgetc()/fgetwc() and putchar()/putwchar() C functions

11. Finding, opening and closing a text file for reading using C file input/output functions