输入数(整数或实数)的个数,再输入n个数,求它们的和.当输入的数的个数为0时终止程序.-The input consists of one or more test cases. The first line of each test case is an integer N(N>0), indicating the amount of numbers you will add up to. The next N lines each consists of a number. You should add the N numbers together. N=0 indicates the end of input, which you shouldn t process.