Arithmetic interface version of pairing

Arithmetic Interface Edition
Compiling the Environment Eclipse
Developer Zhouweixiong Number 201306114339
Teammate Shao Jia Literature No. 201306114322 Blog: http://www.cnblogs.com/shaojiawen/

1. The program supports positive integer arithmetic, supports fractions, divides two decimals
2. The expression li contains a negative integer (negative integer minimum of less than 100), and the negative number needs to be bracketed, the user input results without parentheses
3 Users can choose the number of questions (up to 5 topics), the end of the answer can show the number of questions answered by the user and the number of correct questions
4 users in the first answer, users need to enter the user name, the next time the user starts, the program needs to remember the user's previous user name
5 The program can be a single integer factorial problem
6 program can set the skin function, you can change the color of the interface

Experience: In this programming, encountered a lot of problems, in the programming, while learning to do, recognize their shortcomings, in this homework, learned a lot of knowledge, is the biggest harvest of the job.

In cooperation, we learn from each other, not before the code, but this method let me benefit, programming problems encountered, we solve together, which also let me learn how to cooperate with others,

To learn from each other.

Arithmetic interface version of pairing