方阵逆时针旋转90度， 程序的运行过程是：首先显示器提示输入方阵的大小，而数据的输入又有一定的限制，如当输入的数为负数时，就会有提示信息说“输入的数据非法，请从新输入。”-Square rotated 90 degrees counterclockwise, the running process is: First, the size of the display prompts phalanx, and the data input have certain restrictions, such as when the input number is negative, there will be a message to say " Input data illegally, please re-enter. "