eq() properly compares identical values for char eq() properly compares disimilar values for char lt() properly compares values for char lt() properly compares reversed values for char lt() properly compares equal values for char compare() properly compares identical strings for char compare() properly compares partial identical strings for char compare() properly compares undersized identical strings for char compare() properly compares different sized identical strings for char compare() properly compares different strings for char compare() properly compares different strings for char compare() properly compares different sized identical strings for char compare() properly compares different sized identical strings for char length() properly computes length of 'test' for char length() properly computes length of '' for char length() properly computes length of 'a0b1c2' for char find() properly locates the location of 't' starting at the begining for char find() properly locates the location of 't' with offset 1 for char find() properly locates the location of 't' with offset 3 for char find() properly returns NULL in 0-sized searches for char find() properly returns NULL when not found for char eof() works properly for char not_eof() works properly for char