/in/foo.c: In function 'main':
/in/foo.c:6:2: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
  scanf("%d",&n);
  ^~~~~
/in/foo.c:6:2: warning: incompatible implicit declaration of built-in function 'scanf'
/in/foo.c:6:2: note: include '<stdio.h>' or provide a declaration of 'scanf'
/in/foo.c:10:2: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
  printf("%d",Search(a,n,x));
  ^~~~~~
/in/foo.c:10:2: warning: incompatible implicit declaration of built-in function 'printf'
/in/foo.c:10:2: note: include '<stdio.h>' or provide a declaration of 'printf'
/in/foo.c: In function 'Search':
/in/foo.c:15:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=0;i<n;i++)
  ^~~
/in/foo.c:18:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   return -1;
   ^~~~~~