C – EOF – Close File

EOF (End Of File):

• It is pre-defined constant variable.
• EOF is a macro(constant)
• Constant variables represent in capital letters(in all programming languages)
• EOF is assigned with value -1
• EOF represents “End Of File” while processing file data.

#include<stdio.h> int main() {             printf(“EOF value is : %d \n”, EOF);             printf(“EOF character is : %c \n”, EOF);             return 0; }

Closing the File: fclose() is used to close the file after use.

• It is recommended to release every resource(file) after use.
• On success, it returns 0.
• On Failure, it returns -1.
  • int  fclose(FILE* stream);

We must release Resource (File, Database) after use. Improper shutdown causes loss of data.

#include<stdio.h> int main() {             FILE* p;             int r1, r2;             p = fopen(“code.c”, “r”);             if(p != NULL){                         r1 = fclose(p);                         printf(“On success : %d \n”, r1);                         r2 = fclose(p);                         printf(“On failure : %d \n”, r2);             }             return 0; }