Item Value
Header filestdio.h
Declarationlong int ftell(FILE *stream);
Functionreturns the value for the file position pointer. Valid for binary file and invalid for text file.
Returnreturns -1 on failure.
#include
#include
int main(void){
FILE *fp;
if((fp=fopen("test", "rb")) == NULL) {
printf("Cannot open file.\n");
exit(1);
}
int i;
if((i=ftell(fp)) == -1L)
printf("A file error has occurred.\n");
fclose(fp);
}