/in/foo.c: In function 'main':
/in/foo.c:9:2: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
  scanf("%d",&n1);
  ^~~~~
/in/foo.c:9:2: warning: incompatible implicit declaration of built-in function 'scanf'
/in/foo.c:9:2: note: include '<stdio.h>' or provide a declaration of 'scanf'
/in/foo.c:15:2: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
  printf("%d %d",FindiSecondMax(a,n1),FindiSecondMax(b,n2));
  ^~~~~~
/in/foo.c:15:2: warning: incompatible implicit declaration of built-in function 'printf'
/in/foo.c:15:2: note: include '<stdio.h>' or provide a declaration of 'printf'
/in/foo.c:8:17: warning: unused variable 'bb' [-Wunused-variable]
  int n1,n2,i,aa,bb;
                 ^~
/in/foo.c:8:14: warning: unused variable 'aa' [-Wunused-variable]
  int n1,n2,i,aa,bb;
              ^~
/in/foo.c: In function 'Search':
/in/foo.c:36:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^