/in/foo.cc: In function 'int main()':
/in/foo.cc:8:20: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[100]' [-Wformat=]
  { scanf("%s",&a[i]);
                    ^
/in/foo.cc:29:9: error: 'p' was not declared in this scope
      if(p==j)
         ^