/in/foo.c: In function 'main':
/in/foo.c:9:5: warning: implicit declaration of function 'Search' [-Wimplicit-function-declaration]
  if(Search(a,n,x)!=-1)
     ^~~~~~
/in/foo.c: In function 'Search':
/in/foo.c:20:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=0;i<n;i++)
  ^~~
/in/foo.c:23:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   return -1;
   ^~~~~~