Quick Answer: What Is Fprintf Used For?

What does fprintf return?

The fprintf() function returns the number of bytes that are printed or a negative value if an output error occurs..

What is the difference between printf and fprintf?

printf function is used to print character stream of data on stdout console. fprintf: fprintf is used to print the string content in file but not on stdout console.

What is fscanf and fprintf in C?

fscanf() function is used to read formatted data from a file. In a C program, we use fscanf() as below. fscanf (fp, “%d”, &age); … Declaration: int fprintf(FILE *fp, const char *format, …) fprintf() function is used to write formatted data into a file.

What is the first parameter of fprintf ()?

Here, instead of displaying the data on the monitor, or saving it in some string, the formatted data is saved on a file which is pointed to by the file pointer which is used as the first parameter to fprintf. The file pointer is the only addition to the syntax of printf.

How do I use fprintf?

The fprintf function%s – print a string.%c – print a single character.%d – print a whole number.%f – print a floating point number.\n – print a new line (go to the next line to continue printing)\t – print a tab.\\ – print a slash.%% – print a percent sign.

What is the value of EOF?

EOF is a macro which expands to an integer constant expression with type int and an implementation dependent negative value but is very commonly -1. ‘\0’ is a char with value 0 in C++ and an int with the value 0 in C. The reason why printf(“%d”,a==EOF); resulted in 1 was because you didn’t assign the value EOF to a .