C programming/stdio.h/fclose

fclose is a C function belonging to the ANSI C standard library, and included in the file stdio.h. Its purpose is close a stream and all the structure associated with it. Usually the stream is an open file. fclose has the following prototype: int fclose(FILE *file_pointer) It takes one argument: a pointer to the FILE structure of the stream to close, eg: :fclose(my_file_pointer) This line call the function fclose to close FILE stream structure pointed by my_file_pointer. The return value is an integer with the following meaning: 0 (zero): the stream was closed successfully; EOF: an error occurred; One can check for an error by reading errno. fclose has undefined behavior if it attempts to close a file pointer that isn't currently assigned to a file - in many cases, this results in a program crash. It is usually a wrapper for a close (system call). Example usage #include <stdio.h> int main(void) { FILE *file_pointer; int i; file_pointer = fopen("myfile.txt", "r"); fscanf(file_pointer, "%d", &i); printf("The integer is %d\n", i); fclose(file_pointer); return 0; } The above program opens a file called myfile.txt and scans for an integer in it. deep