c++源代码，包括约瑟夫问题、万年历的实现、用C++编写通讯录、螺旋方阵的输出、分形算法和一个编程大赛试题等等。-c++ source code, including Joseph problems, the realization of calendar with C++ the preparation of contacts, the output of square spiral, fractal algorithm and a programming contest questions

螺旋矩阵：产生指定大小N的螺旋N*N矩阵最好是小于15*15 的这样看起来会直观一些-Spiral Matrix: have specified the size N of the N* N matrix spiral preferably less than 15* 15 of this appears to be some intuitive