Fscanf C Expression Stream Null [ Confirmed ◎ ]

FILE *fptr = fopen("non_existent_file.txt", "r"); // If the file didn't open, fptr is NULL. // The next line will crash the program: fscanf(fptr, "%s", buffer); Use code with caution. Copied to clipboard 3. The "Expression" and Return Value

Usually returned if the end of the input stream is reached or if a read error occurs before any conversion. Fscanf C Expression Stream Null

Most developers don't pass NULL on purpose. It usually happens because of a failed fopen call: FILE *fptr = fopen("non_existent_file