计算器

设计要求:

1:可以通过键盘输入,并能显示输入相对应的数字.

2:能够进行加,减,乘,除准确的基本运算.

3:能够进行3位或3位的以上的乘,除运算.

4:自由发挥其他功能-Calculators

Design requirements:

1: through keyboard input, and can show the corresponding digital input.

2: the ability to add, subtract, multiply, divide and accurate basic operations.

3: can be three or three of the above, divide and multiply.

4: Other features free play