你好，为什么完善后的程序sums正确，但是uper和lower的值在输出的时候分别都增加了？
enter uper and lower integer limits:
3 1
the sums of the squares from 4 to 3 is 14.
enter uper and lower integer limits:
2 1
the sums of the squares from 3 to 2 is 5.
enter uper and lower integer limits:
2018-04-23 21:22