internal static int[][] multiply(Matrix A, Matrix B) //AB矩阵相乘
{
if (A == null || B == null || A.tuple == null || B.tuple == null)
{
throw new NullReferenceException("请先创建矩阵！");
}
if (A.maxcol != B.maxrow) //A列数需要等于B行数
{
throw new ArgumentException("这两个矩阵不可以相乘！");
}
int[][] ArrayA = MatrixMethod.toArray(A);
int[][] ArrayB = MatrixMethod.toArray(B);
int[][] result = new int[A.maxrow][]; //根据矩阵定义可知相乘行数等于A行数，列数等于B列数
for (int i = 0; i < A.maxrow; i++)
{
int[] column = new int[B.maxcol];
for (int j = 0; j < B.maxcol; j++)
{
column[j] = 0; //所有元素初始化为0
}
result[i] = column;
}
for (int i = 0; i < A.maxrow; i++)
{
for (int j = 0; j < B.maxcol; j++)
{
for (int k = 0; k < B.maxrow; k++)
{
result[i][j] += ArrayA[i][k] * ArrayB[k][j]; //对应元素A行乘B列相加
}
}
}
return(result);
}
internal void printmatrix() //打印矩阵
{
if (tuple == null)
{
Console.WriteLine("请先创建矩阵");
return;
}
Console.WriteLine("打印矩阵");
int[][] matrix = MatrixMethod.toArray(this); //转换为二维数组
DataStruct5.printarray(matrix); //打印二维数组
}
static void Main(string[] args)
{
Console.WriteLine("稀疏矩阵运算器");
Console.WriteLine("1.输入矩阵A");
Console.WriteLine("2.输入矩阵B");
Console.WriteLine("3.输出矩阵A及其三元组表");
Console.WriteLine("4.输出矩阵B及其三元组表");
Console.WriteLine("5.输出A+B");
Console.WriteLine("6.输出A-B");
Console.WriteLine("7.输出B-A");
Console.WriteLine("8.输出A×B");
Console.WriteLine("9.输出B×A");
Console.WriteLine("输入（1-9）操作：");
Matrix A = null;
Matrix B = null;
while (true)
{
string i = Console.ReadLine();
switch (i)
{
case "1":
Console.WriteLine("输入矩阵A（行列不超过20，非零元数不超过行×列）");
Console.Write("请输入最大行数：（1-20）：");
reinput1 : try
{
int row = int.Parse(Console.ReadLine());
Console.Write("请输入最大列数：（1-20）：");
int col = int.Parse(Console.ReadLine());
if (row < 1 || col < 1 || row > 20 || col > 20)
{
throw new Exception("行列数不合法！");
}
int count = row * col;
Console.Write("请输入非零元数：（1-" + count + "）：");
count = int.Parse(Console.ReadLine());
if (count > row * col || count < 1)
{
throw new Exception("非零元数不合法！");
}
A = new Matrix(row, col, count);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine("重新输入");
goto reinput1;
}
break;
case "2":
Console.WriteLine("输入矩阵B（行列不超过20，非零元数不超过行×列）");
Console.Write("请输入最大行数：（1-20）：");
reinput2 : try
{
int row = int.Parse(Console.ReadLine());
Console.Write("请输入最大列数：（1-20）：");
int col = int.Parse(Console.ReadLine());
if (row < 1 || col < 1 || row > 20 || col > 20)
{
throw new Exception("行列数不合法！");
}
int count = row * col;
Console.Write("请输入非零元数：（1-" + count + "）：");
count = int.Parse(Console.ReadLine());
if (count > row * col || count < 1)
{
throw new Exception("非零元数不合法！");
}
B = new Matrix(row, col, count);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine("重新输入");
goto reinput2;
}
break;
case "3":
Console.WriteLine("打印矩阵A及其三元组表");
A.print();
Console.WriteLine();
A.printmatrix();
Console.WriteLine();
break;
case "4":
Console.WriteLine("打印矩阵B及其三元组表");
B.print();
Console.WriteLine();
B.printmatrix();
Console.WriteLine();
break;
case "5":
Console.WriteLine("打印矩阵A+B");
try
{
int[][] m = MatrixMethod.addOrMinus(A, B, 1);
printarray(m);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
break;
case "6":
Console.WriteLine("打印矩阵A-B");
try
{
int[][] m = MatrixMethod.addOrMinus(A, B, 0);
printarray(m);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
break;
case "7":
Console.WriteLine("打印矩阵B-A");
try
{
int[][] m = MatrixMethod.addOrMinus(B, A, 0);
printarray(m);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
break;
case "8":
Console.WriteLine("打印矩阵A×B");
try
{
int[][] m = MatrixMethod.multiply(A, B);
printarray(m);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
break;
case "9":
Console.WriteLine("打印矩阵B×A");
try
{
int[][] m = MatrixMethod.multiply(B, A);
printarray(m);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
break;
default: return;
}
Console.WriteLine("输入（1-9）继续执行操作：");
}
}