martrix.cpp

计算两个矩阵的乘法,利用c语言实现

// Martrix.cpp : Defines the entry point for the console application.
//

//===========================================================================
// 程序名称：Matrxi.c
// 程序功能：计算两个矩阵的乘法
// 其中矩阵A为5×4，矩阵B位4×5矩阵
//===========================================================================

#include "stdafx.h"

#define RowA 5
#define ColA 4
#define RowB 4 
#define ColB 6     
//必须要使得矩阵A的列数和矩阵B的行数相同,即ColA=RowB;

void main()
{
	int i,j,k;
	int MatrixA[RowA][ColA];
	int MatrixB[RowB][ColB];
	int MatrixC[RowA][ColB];

	printf("Please input the Matrix A:");   //输入矩阵A的数据
	for (i=0;i<RowA;i++)
		for (j=0;j<ColA;j++)
			scanf("%d",&MatrixA[i][j]);

	printf("Please input the Matrix B:");  //输入矩阵B的数据
	for (i=0;i<RowB;i++)
		for (j=0;j<ColB;j++)
			scanf("%d",&MatrixB[i][j]);
    
	printf("You input Matrix are:\n");    //输出矩阵A和B的数据
	printf("Matrix A: \n");

	for (i=0;i<RowA;i++)
	{
		for(j=0;j<ColA;j++)
			printf("%5d",MatrixA[i][j]);
			printf("\n");
	}
	printf("Matrix B: \n");

	for (i=0;i<RowB;i++)
	{
		for (j=0;j<ColB;j++)
			printf("%5d",MatrixB[i][j]);
			printf("\n");
	}

	for (i=0;i<RowA;i++)                        //计算矩阵C的值
	{
		for (j=0;j<ColB;j++)
		{
			MatrixC[i][j]=0;
			for (k=0;k<RowB;k++)
			MatrixC[i][j]+=MatrixA[i][k]*MatrixB[k][j];
		}
	}

	printf("The Matrix C is : \n");     //输出矩阵C的值
	for (i=0;i<RowA;i++)
	{
		for (j=0;j<ColB;j++)
			printf("%5d",MatrixC[i][j]);
		    printf("\n");
	}
}