这片文章介绍了如何利用二维动态数组指针做矩阵运算,需要的朋友可以参考下
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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