In C/C++, getc() returns EOF when end of file is reached. getc() also returns EOF when it fails. So, only comparing the value returned by getc() with EOF is not sufficient to check for actual end of file. To solve this problem, C provides feof() which returns non-zero value only if end of file has reached, otherwise it returns 0.
For example, consider the following C program to print contents of file test.txt on screen. In the program, returned value of getc() is compared with EOF first, then there is another check using feof(). By putting this check, we make sure that the program prints “End of file reached” only if end of file is reached. And if getc() returns EOF due to any other reason, then the program prints “Something went wrong”
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
- What is return type of getchar(), fgetc() and getc() ?
- Difference between getc(), getchar(), getch() and getche()
- __builtin_inf() functions of GCC compiler
- Count substrings that contain all vowels | SET 2
- How can we use Comma operator in place of curly braces?
- Basic Code Optimizations in C
- Constants vs Variables in C language
- Sum of an array using MPI
- Difference between pointer to an array and array of pointers
- dot (.) operator in C/C++
- Features and Use of Pointers in C/C++
- Difference between while and do-while loop in C, C++, Java
- C program to sort an array using pointers
- C Program to count the Number of Characters in a File