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二维动态数组指针做矩阵运算 学习二维动态数组指针做矩阵运算的方法

王维来 人气:0
想了解学习二维动态数组指针做矩阵运算的方法的相关内容吗,王维来在本文为您仔细讲解二维动态数组指针做矩阵运算的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:二维数组指针,矩阵运算,下面大家一起来学习吧。

本文分享了利用二维动态数组指针做矩阵运算的实现代码。

1. 头文件    

// juzhen 2.cpp : Defines the entry point for the console application.
//
 
#include "stdafx.h"
#include "stdlib.h"
#include "windows.h"
#define OK 0
#define NG -1
typedef struct mat
{
int nRow;     /* 行数        */
int nCol;     /* 列数        */
int* pData;    /* 指向矩??体的指? */
}MAT;

2. 程序代码    

#include "stdafx.h"
#include "Matrix_cal.h"
/* Entity and initial matrix of the application matrix function */
int MATAlloc(MAT *pMat, int nRow, int nCol)
{
  pMat->pData = (int *) malloc (nRow * nCol * sizeof(int) );
  if(NULL == pMat->pData)
  {
    printf("Memary is error!\n");
    return NG;
  }
  for(int i=0; i<nRow; ++i)
  {
    for(int j=0; j<nCol; ++j)
    {
      *(pMat->pData + i*nCol + j)=0;
    }
  }
  pMat->nRow = nRow;
  pMat->nCol = nCol;
  return OK;
}
 
/* Release the memory space and reset the matrix data function */
void MATFree(MAT* pMat)
{
  free(pMat->pData);
  pMat->pData = NULL;
  pMat->nRow = 0;
  pMat->nCol = 0;
}
 
/* Import of matrix function */
int MATAssign (MAT* pMat1, const MAT* pMat2)
{
  MATAlloc(pMat1, pMat2->nRow, pMat2->nCol);
  for(int i=0; i < pMat1->nRow; ++i)
  {
    for(int j=0; j < pMat1->nCol; ++j)
    {
      *(pMat1->pData + i * pMat1->nCol + j) = *(pMat2->pData + i * pMat1->nCol + j);
    }
  }
  return OK;   
}
 
/* Matrix sum function */
int MATAdd(const MAT* pMat1, const MAT* pMat2, MAT* pMat3)
{
  MATAlloc(pMat3, pMat1->nRow, pMat1->nCol);
  if((pMat1->nRow == pMat2->nRow) && (pMat1->nCol == pMat2->nCol))
  {
    for(int i=0; i<pMat1->nRow; ++i)
    {
      for(int j=0; j<pMat1->nCol; ++j)
      {
        *(pMat3->pData + i * pMat3->nCol + j) = *(pMat1->pData + i * pMat1->nCol + j) + *(pMat2->pData + i * pMat1->nCol + j);
      }
    }
    return OK;   
  }
  else
  {
    printf("Not add!\n");
    return NG;
  }
 
}
 
/* Matrix subtraction function */
int MATSub(const MAT* pMat1, const MAT* pMat2, MAT* pMat3)
{
  MATAlloc(pMat3, pMat1->nRow, pMat1->nCol);
  if((pMat1->nRow == pMat2->nRow) && (pMat1->nCol == pMat2->nCol))
  {
    for(int i=0; i<pMat1->nRow; ++i)
    {
      for(int j=0; j<pMat1->nCol; ++j)
      {
        *(pMat3->pData + i * pMat3->nCol + j) = *(pMat1->pData + i * pMat1->nCol + j) - *(pMat2->pData + i * pMat1->nCol + j);
      }
    }
    return OK;   
  }
  else
  {
    printf("Not Sub!\n");
    return NG;
  }
 
}
 
/* Matrix clear */
void MATClear(MAT* pMat)
{
  for(int i=0; i<pMat->nRow; ++i)
  {
    for(int j=0; j<pMat->nCol; ++j)
    {
      *(pMat->pData + i * pMat->nCol + j)=0;
    }
  }
}
 
/* Matrix multiplication C function */
void MATMulC (MAT* pMat, int C)
{
  for(int i=0; i<pMat->nRow; ++i)
  {
    for(int j=0; j<pMat->nCol; ++j)
    {
      *(pMat->pData + i * pMat->nCol + j) = C * (*(pMat->pData + i * pMat->nCol + j) );
    }
  }
}
 
/* Matrix multiplication function */
int MATMul (const MAT* pMat1, const MAT* pMat2, MAT* pMat3)
{
  MATAlloc(pMat3, pMat1->nRow, pMat2->nCol);
  if(pMat1->nCol == pMat2->nRow)
  {
    for(int i=0; i<pMat1->nRow; ++i)
    {
      for(int j=0; j<pMat2->nCol; ++j)
      {
        for(int k=0; k<pMat1->nCol; ++k)
        {
          *(pMat3->pData + i * pMat2->nCol+j) += *(pMat1->pData + i * pMat2->nRow + k) * (*(pMat2->pData + k * pMat2->nCol + j) );
        }
      }
    }
    return OK;   
  }
  else
  {
    printf("not Mul\n");
    return NG;
  }
}
/* Matrix transpose function */
int MATTransport(const MAT* pMat1, MAT* pMat2)
{
  MATAlloc(pMat2, pMat1->nCol, pMat1->nRow);
  for(int i=0; i<pMat1->nRow; ++i)
    {
      for(int j=0; j<pMat1->nCol; ++j)
      {
        *(pMat2->pData + j * pMat1->nRow + i) = *(pMat1->pData + i * pMat1->nCol + j);
      }
    }
  return OK;
}
/*
bool Check_digit(char *kk)
{
  int a = strlen(kk);
  for(int i = 0; i<a; ++i)
  {
    if( ( (int) (*(kk + i) ) > 48) && ( (int) (*(kk + i) ) < 57 || (int) (*(kk + i) ) == 32) )
    {
      return 1;
    }
  }
  return 0;
}
 
*/
 
/* Matrix initialization */
void MATinit(MAT *pMat)
{
  bool kos=1;
  int nRow = 0, nCol = 0;
  printf("Please input the number of rows: ");
  scanf_s("%d",&nRow);
  putchar('\n');
  printf("Please input the number of columns: ");
  scanf_s("%d",&nCol);
  putchar('\n');
  printf("Please input %dX%d Matrix:\n",nRow,nCol);
  kos=MATAlloc(pMat,nRow,nCol);
  for(int i=0; i<nRow; ++i)
  {
    for(int j=0; j<nCol; ++j)
    {
      scanf("%d", pMat->pData + i*nCol + j);
    }
  }
}
  /*char arr[100][100]={0};
  for(int i=0; i<nRow; ++i)
  {
    for(int j=0; j<nCol; ++j)
    {
      scanf("%c", &arr[i][j]);
      kos = Check_digit(&arr[i][j]);
    }
  }
  //ks= atoi(arr[0]);
  while(kos)
  {
    printf(" input is error,Please input again!");
    for(int i=0; i<nRow; ++i)
    {
      for(int j=0; j<nCol; ++j)
      {
        scanf("%c", arr[i]);
      }
    }
    kos = Check_digit(arr[0]);
    //ks= atoi(arr[0]);
  }
  for(int i=0; i<nRow; ++i)
  {
    for(int j=0; j<nCol; ++j)
    {
      *(pMat->pData + i*nCol + j) = atoi(&arr[i][j]);
    }
  }
 
}
*/
 
/* Output matrix */
void Print(MAT *pMat)
{
  printf("The result is:\n");
  for(int i = 0; i < pMat->nRow; ++i)
  {
    for(int j=0; j<pMat->nCol; ++j)
    {
      printf("%d ",*( pMat->pData + i * pMat->nCol + j) );
    }
    putchar('\n');
  }
}
 
int _tmain(int argc, _TCHAR* argv[])
{
  int nRow = 1,nCol = 1,sign = 1,C = 1,work = 1,sigal=0;
  MAT Mat, Mat1, Mat2;
  MAT *pMat = &Mat;
  MAT *pMat1 = &Mat1;
  MAT *pMat2 = &Mat2;
  while(work)
  {
    system("cls");
    printf("           Welcome To The Matrix Operation system!   \n");
    printf("------------------------------------------------\n");
    printf("1: Open The Generating matrix function!\n");
    printf("2: Open The Release matrix function!\n");
    printf("3: Open The Import matrix function!\n");
    printf("4: Open The Add matrix function!\n");
    printf("5: Open The Matrix subtraction function!\n");
    printf("6: Open The Clear matrix function!\n");
    printf("7: Open The Matrix multiplication C function!\n");
    printf("8: Open The Matrix multiplication function!\n");
    printf("9: Open The Matrix transpose function!\n");
    printf("------------------------------------------------\n");
    printf("Please Select operation type:");
    scanf("%d",&sign);
    switch(sign)
    {
      case 1:
      {
       MATinit(pMat);
       Print(pMat);
      }
      break;
      case 2:
      {
        MATinit(pMat);
        Print(pMat);
        MATFree(pMat);
      }
      break;
      case 3:
      {
       
        MATinit(pMat2);
        MATAssign (pMat1, pMat2);
        Print(pMat1);
      }
      break;
      case 4:
      {
        MATinit(pMat1);
        MATinit(pMat2);
        sigal = MATAdd(pMat1, pMat2,pMat);
        if(0 == sigal)
        {
          Print(pMat);
        }
      }
      break;
      case 5:
      {
        MATinit(pMat1);
        MATinit(pMat2);
        sigal = MATSub(pMat1, pMat2,pMat);
        if(0 == sigal)
        {
          Print(pMat);
        }
      }
      break;
      case 6:
      {
        MATinit(pMat);
        Print(pMat);
        MATClear(pMat);
        Print(pMat);
      }
      break;
      case 7:
      {
        printf("Please input the number of C: ");
        scanf("%d",&C);
        putchar('\n');
        MATinit(pMat);
        MATMulC (pMat, C);
        Print(pMat);
      }
      break;
      case 8:
      {
        MATinit(pMat1);
        MATinit(pMat2);
        sigal = MATMul (pMat1, pMat2, pMat);
        if(0 == sigal)
        {
          Print(pMat);
        }
      }
      break;
      case 9:
      {
        MATinit(pMat1);
        MATTransport(pMat1, pMat2);
        Print(pMat2);
      }
      break;
      default: printf("input is error!");
    }
    printf("Whether exit the Matrix calculation system?(1 is not exit,0 is exit)\n");    //whether exit the system.
    scanf("%d", &work);
    fflush(stdin);
    while (work != 0 && work != 1)                             //work must is 1 or 0.
    {
      printf(" Input is error,Please input again!\n");
      scanf("%d", &work);
      fflush(stdin);
    }
  }
  printf("\n-------------Thanks For You Using The Matrix Calculation System !--------------\n");
  Sleep(2000);                                        //deley some times.
  return 0;
}


以上就是实现二维动态数组指针做矩阵运算的代码,希望对大家的学习有所帮助。

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