latin.c: In function 'quicksort': latin.c:6: warning: unused variable 't' latin.c: In function 'main': latin.c:40: warning: unused variable 'f' latin.c:41: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result latin.c:42: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result latin.c:43: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result latin.c:46: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result