Practical C Programming

fopen()

The fopen() function is used for opening a file for reading, writing, and doing other operations. Here is its syntax:

FILE *fopen (const char *file_name, const char *mode)

Here, file_name represents the file that we want to work on and mode states the purpose for which we want to open the file. It can be any of the following:

• r: This opens the file in read mode and sets the file pointer at the first character of the file.
• w: This opens the file in write mode. If the file exists, it will be overwritten.
• a: Opens the file in append mode. Newly entered data will be added at the end of the file.
• r+: This opens the file in read and write mode. The file pointer is set to point at the beginning of the file. The file content will not be ...