Trying to make search function. Evidently I am missing the boat and dont know how to set up a function correctly. Care to comment on how to put search and sort together so it comes out helpers.h? 

This is what I get:
ank2251@ide50:~/workspace/pset3/find $ make sub
clang -ggdb3 -O0 -std=c99 -Wall -Werror    sub.c  -lcs50 -lm -o sub
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 0 has invalid symbol index 11
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 1 has invalid symbol inde