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나는이 프로그램을 어떤 크기이든 관계없이 행렬을 조 변경해야합니다. 그러나 그것은 예상대로 작동하지 않고 왜 나는 출력을 얻지 못하지만 컴파일 오류는 없지만 {1,2,3}, {4,5,6}의 출력은 { 1,0,0}, {0,0,4}, 나에게 전혀 이해가되지 않습니다. 저는 종이에 여러 번 "메모리 스냅 샷"을 통해 작업 해 왔지만, 제가 누락 된 것을 찾을 수는 없었습니다.이 시점에서 또 다른 눈 세트가 필요합니다. 덕분입니다.누군가가이 프로그램의 문제를 해결할 수 있습니까? (포인터를 사용하여 행렬을 바꿉니다)
#include "stdafx.h"
#include <fstream>
#include <iostream>
#include <iomanip>
#include <string>
#include <cmath>
#include <vector>
using namespace std;
void squaretranspose(int &M, int &MT, int ROWS, int COLS);
int main(void)
{
int M[2][3]={{1,2,3},{4,5,6}};
int MT[3][2]={0};
int ROWS(2),COLS(3);
int i,j;
cout << " The entries of the original matrix " << endl;
for(i=0;i<=ROWS-1;i++)
{
for(j=0;j<=COLS-1;j++)
{
cout<<M[i][j]<<"\t";
}
cout << endl;
}
squaretranspose(M[0][0],MT[0][0],ROWS,COLS);
cout << " The entries of the transposed non-square matrix " << endl;
for(i=0;i<=COLS-1;i++)
{
cout << endl;
for(j=0;j<=ROWS-1;j++)
{
cout<<MT[i][j]<<"\t";
}
}
system ("PAUSE");
return 0;
}
void squaretranspose (int &M, int &MT, int ROWS, int COLS)
{
// declare pointers to change the input matrice's values
int *ptr,*ptrT;
// declare indices for a row by row process
int i,j;
// declare placeholder 2d vectors for swapping the I,j, entries to ,j,i entries
vector < vector<int>> temp(ROWS,COLS);
vector < vector<int>> tempT(COLS,COLS);
vector < vector<int>> temp_T(ROWS,ROWS);
// set the pointers to point to the first entry of the input and output matrices
ptr = &M;
ptrT = &MT;
// if rows=cols we want to use 2d vector temp
if (ROWS=COLS)
{
// store all of the input matrice's values in the 2d vector "temp"
for(i=0;i<=ROWS-1;i++)
{
for(j=0;j<=COLS-1;j++)
{
// set the i,j th entry of the 2d vector "temp" equal to the value currently pointed to by the pointer
temp[i][j]=*ptr;
// increment the pointer to the address of the next entry of the input matrix unless we are on the last entry
if ((i!=ROWS-1)&&(j!=COLS-1))
{
ptr++;
}
}
}
}
// reset pointer address to first entry
ptr=&M;
// the for loop for swapping the j,i entries of the 2d vector "temp" with the i,j entries of the input matrix
for(i=0;i<=ROWS-1;i++)
{
for(j=0;j<=COLS-1;j++)
{
// if j is not equal to i swap the value pointed to by the pointer (the i,j entry of the input matrix) for the j,ith entries value of the 2d vector "temp"
if (j!=i)
{
*ptr=temp[j][i];
}
// increment the pointer if it is not on the last entry
if ((i!=ROWS-1)&&(j!=COLS-1))
{
ptr++;
}
}
}*/
// if ROWS<COLS we want to have 2d vector tempT
if (ROWS<COLS)
{
// store all of the input matrice's values in the 2d vector "tempT"
for(i=0;i<=ROWS-1;i++)
{
for(j=0;j<=COLS-1;j++)
{
// set the j,ith entry of the 2d vector "temp" equal to the value currently pointed to by the pointer
tempT[j][i]=*ptr;
// increment the pointer to the address of the next entry of the input matrix
if (((i!=(ROWS-1))&&(j!=(COLS-1))))
{
ptr++;
}
}
}
ptr=&M;
// transport the entries of tempT into the output matrix MT
for(i=0;i<=COLS-1;i++)
{
for(j=0;j<=ROWS-1;j++)
{
*ptrT=tempT[i][j];
// increment the pointer
if (((i!=ROWS-1)&&(j!=COLS-1)))
{
ptrT++;
}
}
}
}
ptrT=&MT;
// if ROWS>COLS we want to use the 2d vector temp_T
if (ROWS>COLS)
{
// store all of the input matrice's values in the 2d vector "temp_T"
for(i=0;i<=ROWS-1;i++)
{
for(j=0;j<=COLS-1;j++)
{
// set the j,i th entry of the 2d vector "temp" equal to the value currently pointed to by the pointer
temp_T[j][i]=*ptr;
// increment the pointer
if (((i!=ROWS-1)&&(j!=COLS-1)))
{
ptrT++;
}
}
// the for loop for swapping the j,i entries of the 2d vector "temp" with the i,j entries of the input matrix
for(i=0;i<=COLS-1;i++)
{
for(j=0;j<=ROWS-1;j++)
{
// if j is not equal to i swap the value pointed to by the pointer (the i,j entry of the input matrix) for the j,ith entries value of the 2d vector "temp"
if (j!=i)
{
*ptrT=temp_T[j][i];
}
// increment the pointer
if (((i!=ROWS-1)&&(j!=COLS-1)))
{
ptrT++;
}
}
}
}
return;
}
// 그래서 거기는 COLS는 매우 작고 ROWS 말 때문에 중간 2D 사각형 벡터의 매우 큰이지만, 다른 모든 것이 꽤 잘하는 경우는 매우 효율적이지 않다이며,이 경우 제대로 작동했다.