掌握矩阵和数组的一般操作，包括创建、保存、修改和调用等。学习矩阵和数组的加减运算与乘法。掌握对数组中元素的寻访与赋值，会对数组进行一般的操作。 -Master matrix and an array of general operations, including create, save, modify, and recalls. Learning addition and subtraction and multiplication of matrices and arrays. Mas