clearerr() in C
Last Updated :
03 Feb, 2025
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In C, file handling errors can be handled using ferror() and feof() functions. But these error flags persists until they are cleared. clearerr() is a built-in function used to reset errors when you are doing read-and-write operations with the file.
Example:
#include <stdio.h>
int main() {
FILE *fptr = fopen("gfg.text", "rw+");
// Reset errors and EOF
clearerr(fptr);
if(!feof(fptr))
printf("EOF reset successfully");
return 0;
}
Output
EOF reset successfullySyntax
clearerr() is a standard library function defined in <stdio.h> file.
clearerr(fptr)
Parameters:
- fptr: File pointer pointing to the file stream.
Return Value:
- This function does not return any value.
Example of clearerr()
#include <stdio.h>
int main() {
FILE *fptr = fopen("gfg.txt", "w+");
fprintf(fptr, "GeeksForGeeks!");
while (fgetc(fptr) != EOF);
if(feof(fptr)){
printf("EOF ancounter \n");
}
// Reset EOF using clearerr
clearerr(fptr);
if(!feof(fptr)){
printf("Reset the EOF successfully");
}
fclose(fptr);
return 0;
}
Output
EOF ancounter Reset the EOF successfully
