同学找我帮忙写的,要求:
矩阵相乘,纯C编写。
不能用C++这点让我十分郁闷啊^_^....
一共包含如下东西:
typedef struct _matrix2D matrix2D; //一个结构体类型matrix2D
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BOOL initMatrix(matrix2D* pm, int h, int w); //初始化pm为h×w的零矩阵
void delMatrix(matrix2D* pm); //矩阵的内部数据空间全部是动态分配的,所以退出之前一定要删除矩阵
int getData(matrix2D* pm, int x, int y); //返回矩阵pm,坐标为x、y的元素值
void setData(matrix2D* pm, int x,int y, int data); //将矩阵pm,坐标为x、y的元素值置为data
void setMatrix(matrix2D* lhs, matrix2D* rhs); //删除矩阵lhs原先的值,并深层拷贝为rhs
matrix2D addMatrix(matrix2D* lhs, matrix2D* rhs); //矩阵相加,返回一个新的矩阵
matrix2D mulMatrix(matrix2D* lhs, matrix2D* rhs); //矩阵相乘,返回一个新的矩阵
void printMatrix(matrix2D* pm); //格式化打印矩阵pm这是一个测试程序,简单相乘两个矩阵:
#include "matrix2d.h"
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int main()
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{
int i,j;
matrix2D rhs;
matrix2D lhs;
matrix2D result;
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initMatrix(&lhs, 11, 10);
initMatrix(&rhs, 10, 2);
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//lhs矩阵设置元素值
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for(i = 0; i<11; i++)
{
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for(j = 0; j<10; j++)
{
setData(&lhs, i, j, 1);
}
}
//rhs矩阵设置元素值
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for(i = 0; i<10; i++)
{
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for(j = 0; j<2; j++)
{
setData(&rhs, i, j, i+1);
}
}
//矩阵相乘
result = mulMatrix(&lhs, &rhs);
//打印三个矩阵
printMatrix(&lhs);
printMatrix(&rhs);
printMatrix(&result);
//不用了,记得释放矩阵空间..
delMatrix(&lhs);
delMatrix(&rhs);
delMatrix(&result);
}这里是显示结果:
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这里下载完整的源代码和运行程序。
posted on 2006-12-07 17:06
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