n.txt

本程序是求解矩阵的逆矩阵的主程序,运行环境是vc6.0

#include <stdio.h>
#include <malloc.h>

void main( void )
{
    float *buffer,*p;  //定义数组首地址指针变量
    short int row,num; //定义矩阵行数row及矩阵元素个数
    short int i,j;
    float determ;     //定义矩阵的行列式

    float comput_D(float *p,short int n);     //求矩阵的行列式
    float Creat_M(float *p, short int m,short int n,short int k); //求代数余子式
    void Print( float *p,short int n);    //打印n×n的矩阵

    printf("\nPlease input the number of rows: ");
    scanf("%d",&row);
    
    num=2 * row * row;
    buffer = (float *)calloc(num, sizeof(float));    //分配内存单元

    p=buffer;
    if(p != NULL)
    {
        for(i=0;i<row;i++)                  //输入各单元值
        {
            printf("Input the number of %d row ",i+1);
            for(j=0;j<row;j++)
            {
                scanf("%f",p++);
            }
        }  
    }
    else
        printf( "Can't allocate memory\n" );

    printf("\nThe original matrix is:\n");
    Print(buffer,row);    //打印该矩阵

    determ=comput_D(buffer,row);    //求整个矩阵的行列式
    p=buffer + row * row;
    if (determ != 0)
    {
        for (i=0;i<row; i++)      //求逆矩阵
            for (j=0; j<row; j++)
                   *(p+j*row+i)=  Creat_M(buffer,i,j,row)/determ;    
            
        printf("The determinant is %G\n",determ);

        p=buffer + row * row;
        printf("\nThe inverse matrix is:\n"); 
        Print(p,row);    //打印该矩阵
    }
    else
        printf("The determnant is 0, and there is no inverse matrix !\n");
    free( buffer );
}