引发异常时，i [rc](== i [0])已在i [rc] ++行中递增，直到值10 .但是值仅包含索引为0..9的元素.

When the exception is thrown i[ rc ]( ==i[ 0 ] ) has been incremented in the line i[rc]++ until the value 10. But values contains only elements with indecees 0..9.