[分享]任意两个矩阵乘积--改进版--加入异常处理
using System;public class MatrixMultiply
{
public static void Main()
{
int a=0,b=0,c=0,d=0;//矩阵A.B的行数.列数
Console.WriteLine ("该程序将求出两个矩阵的积:");
Console.WriteLine ("请指定矩阵A的行数:");
int exception_number=0;
do
{
try
{
a=int.Parse(Console.ReadLine ());
exception_number++;//用这种方法来判断异常是否发生
}
catch(Exception e)
{
Console.WriteLine (e.Message );
Console.WriteLine ("请输入一个数字:");
}
}while(exception_number==0);
Console.WriteLine ("请指定矩阵A的列数:");
do
{
try
{
b=int.Parse (Console.ReadLine ());
exception_number++;
}
catch(FormatException e)
{
Console.WriteLine (e.Message );
Console.WriteLine ("请输入一个数字:");
}
}while(exception_number==0);
int[,] MatrixA=new int [a,b];
for(int i=0;i<a;i++)
{
for(int j=0;j<b;j++)
{
exception_number=0;
do
{
Console.WriteLine ("请输入矩阵A第{0}行第{1}列的值:",i+1,j+1);
try
{
MatrixA[i,j]=int.Parse (Console.ReadLine ());
exception_number++;
}
catch(Exception e)
{
Console.WriteLine (e.Message );
Console.WriteLine ("请输入一个数字:");
}
}while(exception_number==0);
}
}
Console.WriteLine ("矩阵A输入完毕.");
Console.WriteLine ("请指定矩阵B的行数:");
do
{
try
{
c=int.Parse (Console.ReadLine ());
exception_number++;
}
catch(FormatException e)
{
Console.WriteLine (e.Message );
Console.WriteLine ("请输入一个数字:");
}
}while(exception_number==0);
Console.WriteLine ("请指定矩阵B的列数:");
do
{
try
{
d=int.Parse (Console.ReadLine ());
}
catch(FormatException e)
{
Console.WriteLine (e.Message );
Console.WriteLine ("请输入一个数字:");
}
}while(exception_number==0);
int[,] MatrixB=new int [c,d];
for(int i=0;i<c;i++)
{
for(int j=0;j<d;j++)
{
exception_number=0;//因为exception_number是全局变量,而且exception_number的值已被改变,所以需要在每次循环前将其值刷新
do
{
Console.WriteLine ("请输入矩阵A第{0}行第{1}列的值:",i+1,j+1);
try
{
MatrixB[i,j]=int.Parse (Console.ReadLine ());
}
catch(Exception e)
{
Console.WriteLine (e.Message );
Console.WriteLine ("请输入一个数字:");
}
}while(exception_number==0);
}
}
Console.WriteLine ("矩阵B输入完毕.");
Console.WriteLine ("矩阵A为:");
outputMatrix(MatrixA,a,b);
Console.WriteLine ("矩阵B为:");
outputMatrix(MatrixB,c,d);
if(b!=c)//矩阵相乘的条件判断
{
Console.WriteLine ("矩阵A的列数与矩阵B的行数不相等,无法进行乘积运算!");
return;
}
else
{
Console.WriteLine ("矩阵A与矩阵B的乘积为:");
}
int[,] MatrixC=new int [a,d];
for(int i = 0; i < a; i++)
{
for(int j = 0; j < d; j++)
{
MatrixC[i,j] = 0;
for(int k = 0; k < b; k++)
{
MatrixC[i,j] += MatrixA[i,k] * MatrixB[k,j];
}
}
}
outputMatrix(MatrixC,a,d);
}
private static void outputMatrix(int[,] MatrixX, int rowCount, int columnCount)
{
for(int i = 0; i < rowCount; i++)
{
for(int j = 0; j < columnCount; j++)
{
Console.Write(MatrixX[i,j] + "\t");
}
Console.WriteLine();
}
}
}
