用户输入两个矩阵的维数和元素，选择加减乘三种运算方式中的一种，程序将显示运算结果。采用动态分配数组空间。初学C++写的，简单易懂。-user input two-dimensional matrix of elements and a few select modified by the three operators a way, Operational procedures will show results. Dynamic array allocation of space. Novic