We use the getc() and putc() I/O functions to read a character from a file and write a character to a file respectively. Syntax of getc: char ch = getc(fptr); Where, fptr is a file pointer.
The read() function reads data previously written to a file. If any portion of a regular file prior to the end-of-file has not been written, read() shall return bytes with value 0.
The getc() function reads a single character from the current stream position and advances the stream position to the next character. The getchar() function is identical to getc(stdin) .
For reading and writing to a text file, we use the functions fprintf() and fscanf(). They are just the file versions of printf() and scanf() . The only difference is that fprintf() and fscanf() expects a pointer to the structure FILE.
In C programming language, %d and %i are format specifiers as where %d specifies the type of variable as decimal and %i specifies the type as integer. In usage terms, there is no difference in printf() function output while printing a number using %d or %i but using scanf the difference occurs.
%ld. Long Integer Format Specifier. It is used when data type is of long int which stores a long integer value from range [−2,147,483,647, +2,147,483,647]. %lld. Long Long Integer Format Specifier.
getc is one of the character input functions. getc reads the next character from a file, it takes a file pointer to the file. It is the simplest function to read a file.
The %s means, "insert the first argument, a string, right here." The %d indicates that the second argument (an integer) should be placed there. There are different %-codes for different variable types, as well as options to limit the length of the variables and whatnot. Control Character.
Do not open the file in a text editor like Microsoft Word! In Notepad on your PC, open the "File" menu and choose "Save As." Enter the name of your file and add the ". csv" extension. This will automatically change it to CSV format!
CSV- A comma-separated values (CSV) file contains tabular data (numbers and text) in plain-text form. An Excel spreadsheet can be saved as a CSV file. TXT- A text file (TXT) is a computer file that stores a typed document as a series of alphanumeric characters and does not contain special formatting.
