把一个N*N的三角矩阵按列的方式映射到一个3N*2的一维数组，功能设置，输入输出、存储搜索、加减乘、转置。-Put an N* N triangular matrix is ​ ​ mapped to the column by way of a one-dimensional array of 3N* 2, the feature set, input and output, storage, search, add and subtract multiply, trans