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EOF, getc() and feof() in C
EOF
EOF stands for End of File. The function getc() returns EOF, on success..
Here is an example of EOF in C language,
Let’s say we have "new.txt" file with the following content.
This is demo! This is demo!
Now, let us see the example.
Example
#include <stdio.h> int main() { FILE *f = fopen("new.txt", "r"); int c = getc(f); while (c != EOF) { putchar(c); c = getc(f); } fclose(f); getchar(); return 0; }
Output
This is demo! This is demo!
In the above program, file is opened by using fopen(). When integer variable c is not equal to EOF, it will read the file.
FILE *f = fopen("new.txt", "r");
int c = getc(f);
while (c != EOF) {
putchar(c);
c = getc(f);
}getc()
It reads a single character from the input and return an integer value. If it fails, it returns EOF.
Here is the syntax of getc() in C language,
int getc(FILE *stream);
Here is an example of getc() in C language,
Let’s say we have "new.txt" file with the following content −
This is demo! This is demo!
Now, let us see the example.
Example
#include <stdio.h> int main() { FILE *f = fopen("new.txt", "r"); int c = getc(f); while (c != EOF) { putchar(c); c = getc(f); } fclose(f); getchar(); return 0; }
Output
This is demo! This is demo!
In the above program, file is opened by using fopen(). When integer variable c is not equal to EOF, it will read the file. The function getc() is reading the characters from the file.
FILE *f = fopen("new.txt", "r");
int c = getc(f);
while (c != EOF) {
putchar(c);
c = getc(f);
}feof()
The function feof() is used to check the end of file after EOF. It tests the end of file indicator. It returns non-zero value if successful otherwise, zero.
Here is the syntax of feof() in C language,
int feof(FILE *stream)
Here is an example of feof() in C language,
Let’s say we have "new.txt" file with the following content −
This is demo! This is demo!
Now, let us see the example.
Example
#include <stdio.h> int main() { FILE *f = fopen("new.txt", "r"); int c = getc(f); while (c != EOF) { putchar(c); c = getc(f); } if (feof(f)) printf("
Reached to the end of file."); else printf("
Failure."); fclose(f); getchar(); return 0; }
Output
This is demo! This is demo! Reached to the end of file.
In the above program, In the above program, file is opened by using fopen(). When integer variable c is not equal to EOF, it will read the file. The function feof() is checking again that pointer has reached to the end of file or not.
FILE *f = fopen("new.txt", "r");
int c = getc(f);
while (c != EOF) {
putchar(c);
c = getc(f);
}
if (feof(f))
printf("
Reached to the end of file.");
else
printf("
Failure.");
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