#include <stdio.h>
int main () {
FILE *fp;
/* first rename if there is any file */
rename("file.txt", "newfile.txt");
/* now let's try to open same file */
fp = fopen("file.txt", "r");
if( fp == NULL ) {
perror("Error: ");
return(-1);
}
fclose(fp);
return(0);
}
