计算器。学习vc时的习作。普通的计算器，没有科学计算。但是采用了vc皮肤，还算漂亮，可以作为初学者共同学习的资料。-Calculator. Vc exercises at the time of study. Ordinary calculator, there is no scientific computing. But in a vc skin, still beautiful, can be used as a common study of information for beginn