矩阵读写程序，主要用于大型矩阵的读写，提高矩阵的读写速度。-Matrix reading and writing program, mainly for large-scale matrix read and write, read and write speed to improve the matrix.

51单片机实现4*5矩阵键盘C语言编程，采用反接扫描法。-51 MCU 4* 5 matrix the keyboard C language programming, reverse scan method.

矩阵计算器，用于矩阵计算和行列式计算。由于是学生作业，所以不能保证完美-Matrix calculator for matrix calculations and determinant calculation. As the students work, it can not guarantee perfect