//Header file: #include <stdio.h>
//Declaration long int ftell(FILE *stream);
//Return: returns -1 on failure.
#include <stdio.h>
#include <stdlib.h>
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);
}
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