/in/foo.cc: In function 'int main()':
/in/foo.cc:11:22: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'int' [-Wformat=]
       scanf("%d",a[i]);
                  ~~~~^
/in/foo.cc:12:17: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'int' [-Wformat=]
     scanf("%d",b);
                 ^
/in/foo.cc:12:10: warning: 'b' is used uninitialized in this function [-Wuninitialized]
     scanf("%d",b);
     ~~~~~^~~~~~~~