/in/foo.cc: In function 'int main()':
/in/foo.cc:12:27: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'int*' [-Wformat=]
         scanf("%s",a[b[j]]);
                           ^
/in/foo.cc:15:27: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'int*' [-Wformat=]
         printf("%s\n",a[j]);
                           ^
/in/foo.cc:6:15: warning: unused variable 'k' [-Wunused-variable]
     int i=0,j,k;
               ^