iacs5.ucsd.edu% gcc -o test quiz4_test.c
Undefined                       first referenced
 symbol                             in file
exp                                 /var/tmp//ccWLWttE.o
log                                 /var/tmp//ccWLWttE.o
sin                                 /var/tmp//ccWLWttE.o
sinh                                /var/tmp//ccWLWttE.o
log10                               /var/tmp//ccWLWttE.o
ld: fatal: Symbol referencing errors. No output written to test
collect2: ld returned 1 exit status