/in/foo.cc: In function 'int main()':
/in/foo.cc:12:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(unsigned int i=0;i<n;i++){
                       ~^~
/in/foo.cc: In function 'int search(int*, int)':
/in/foo.cc:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(unsigned int i=0;i<n;i++){
                       ~^~
/in/foo.cc:32:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^