foo.c: In function 'main':
foo.c:4:15: warning: missing braces around initializer [-Wmissing-braces]
   int a[2][3]={1,2,3,4,5,6},n,*p;
               ^
                {    }{    }
foo.c:5:4: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
   p=a;
    ^
foo.c:4:29: warning: unused variable 'n' [-Wunused-variable]
   int a[2][3]={1,2,3,4,5,6},n,*p;
                             ^

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