ep5_4.cpp

这里有大量的c语言习题呢！真的是题海哦

/* 5.4  将[例5.5]改用一维数组，附加行、列参数，实现通用算法。*/
#include <iostream>
#include <iomanip>
using namespace std;
void inverse(int [], int [],int,int);//注意数组最高维可缺省，例5.5因初学未省
void multi(int [], int [], int [],int,int,int);
void output(int [],int,int);

int main(){
    int middle[6*3], result[6*4];//注意写作6*3等可清楚看出矩阵的行列
    int matrix1[3*6]={8,10,12,23,1,3,5,7,9,2,4,6,34,45,56,2,4,6};   
    int matrix2[3*4]={3,2,1,0,-1,-2,9,8,7,6,5,4};
	output(matrix1,3,6);
	inverse(matrix1,middle,3,6);
	output(middle,6,3);
	output(matrix2,3,4);
  	multi(middle,matrix2,result,6,3,4);
    output(result,6,4);
	return 0;
}
void inverse(int matrix1_1[],int middle_1[],int a,int b){            
    int i,j;
    for (i=0;i<a;i++)
      for (j=0;j<b;j++)
        middle_1[i+j*a]=matrix1_1[i*b+j];                           
    return;                                                      
}
void multi(int middle_1[],int matrix2_1[],int result_1[],int a,int b,int c){                                                                    
    int i,j,k;
    for (i=0;i<a;i++){
      for (j=0;j<c;j++){
        result_1[i*c+j] = 0;
        for (k=0;k<b;k++)
          result_1[i*c+j]+=middle_1[i*b+k]*matrix2_1[k*c+j];
      }
    }
    return;
}
void output(int max_1[],int a,int b){
	for (int i=0;i<a;i++){
      for (int j=0;j<b;j++)
        cout <<setw(4)<<max_1[i*b+j]<<"  ";
      cout<<'\n';
    }
	cout<<endl;
    return;                                                       
}