我正在试图找出我跑步时程序失败的原因。到目前为止,当我运行我的程序时,它失败了。我调试了错误,它将我带到了dbgdel.cpp。第32行“_ASSERTE(_BLOCK_TYPE_IS_VALID(pHead-> nBlockUse));”。我找到了答案无济于事,但它与我的内存泄漏有关?
这是我的标题:
#include <iostream>
using namespace std;
namespace project
{
#ifndef MATRIX_H
#define MATRIX_H
typedef int* IntArrayPtr;
class Matrix
{
public:
friend ostream& operator<<(ostream& out, Matrix& object);
//friend istream& operator>>(istream& in, Matrix& theArray);
//Default Constructor
Matrix();
Matrix(int max_number_rows, int max_number_cols, int intial_value);
//Destructor
~Matrix();
//Copy Constructor
Matrix(const Matrix& right_side);
//Assignment Operator
Matrix& operator=(const Matrix& right_side);
void Clear();
int Rows();
int Columns();
bool GetCell(int x,int y, int& val);
bool SetCell(int x,int y, int val);
int getNumber(int r, int c);
//void Debug(ostream& out);
private:
int initialVal;
int rows;
int cols;
IntArrayPtr *m;
};
#endif
}
我的实施档案:
#include <iostream>
#include "Matrix.h"
using namespace project;
using namespace std;
namespace project
{
Matrix::Matrix()
{
typedef int* IntArrayPtr;
IntArrayPtr *m = new IntArrayPtr[1];
for(int i = 0; i < 1; i++)
m[i] = new int[1];
for(int r = 0; r < 1; r++)
for(int c = 0; c < 1;c++)
m[r][c] = 0;
}
Matrix::Matrix(int max_number_rows, int max_number_cols, int initial_value)
{
initialVal = initial_value;
rows = max_number_rows;
cols = max_number_cols;
IntArrayPtr *m = new IntArrayPtr[rows];
for(int i = 0; i < rows; i++)
m[i] = new int[cols];
for(int r = 0; r < max_number_rows; r++)
for(int c = 0; c < max_number_cols;c++)
m[r][c] = initial_value;
}
Matrix::~Matrix()
{
for(int i = 0; i <= rows; i++)
delete [] m[i];
delete [] m;
}
void Matrix::Clear()
{
for(int r = 0; r < rows; r++)
for(int c = 0; c < cols;c++)
m[r][c] = initialVal;
}
int Matrix::Rows()
{
return rows;
}
int Matrix::Columns()
{
return cols;
}
bool Matrix::GetCell(int x,int y, int& val)
{
if(x < rows || y < cols)
return false;
else
{
val = m[x - 1][y - 1];
return true;
}
}
bool Matrix::SetCell(int x, int y, int val)
{
if(x < rows || y < cols)
return false;
else
{
m[x - 1][y - 1] = val;
return true;
}
}
int Matrix::getNumber(int r, int c)
{
return m[r][c];
}
ostream& operator<<(ostream& out, Matrix& object)
{
for(int r = 0; r < object.rows; r++)
{
for(int c = 0; c < object.cols; c++)
{
out << " " << object.m[r][c];
}
out << endl;
}
return out;
}
Matrix& Matrix::operator=(const Matrix& right_side)
{
if (this != &right_side)
{
rows = right_side.rows;
cols = right_side.cols;
delete[] m;
IntArrayPtr *m = new IntArrayPtr[rows];
for(int i = 0; i < rows; i++)
m[i] = new int[cols];
for(int r = 0; r < rows; r++)
for(int c = 0; c < cols;c++)
m[r][c] = right_side.initialVal;
}
return *this;
}
/*
void Matrix::Debug(ostream& out)
{
out << "Number of rows = " << rows << endl;
out << "Number of columns = " << cols << endl;
out << "Initializer = " << initialVal << endl;
out << "Current contents of the matrix: " << endl;
out << m << endl;
}
*/
/*
istream& operator >>(istream& in, Matrix& theArray)
{
in >>
}
void interfaceMatrix()
{
int userChoice, rows, columns, value;
cout << "Default matrix or custom(1 for default, 0 for custom): ";
cin >> userChoice;
if (userChoice == 1)
{
Matrix object;
return object;
}
else if(userChoice == 0)
{
cout << "Enter number of rows: ";
cin >> rows;
cout << "Enter number of columns: ";
cin >> columns;
cout << "Enter initial value of each element: ";
cin >> value;
if(rows <= 0 || columns <= 0)
{
cout << "Invalid input." << endl;
exit(1);
}
else
{
Matrix object(rows, columns, value);
return object;
}
}
else
{
cout << "Invalid choice." << endl;
exit(1);
}
}
*/
}
在我的驱动程序中,我只使用了Matrix测试(2,2,2),因此我可以为每个元素创建一个初始值为2的2 x 2数组。我得到了上述错误。
答案 0 :(得分:2)
您正在分配rows
个行数,但是要取消分配rows+1
个行数。
检查析构函数。 &lt; =必须&lt;。
除此之外,您的代码中还存在许多其他[潜在]错误:
m
变量,而不是设置类的m
数据成员(这就是为什么我的约定总是在数据成员之前用m_来防止这种混淆)。此错误同时出现在构造函数和赋值运算符中。rows
分配矩阵,但max_number_rows
初始化矩阵。虽然它现在可以正常工作,但如果row
稍后以不同方式进行初始化(例如,如果使用row
初始化std::max(max_number_rows,1000)
,则可能会导致错误。您在赋值运算符中的代码更好。>=
而不是<
答案 1 :(得分:1)
两个问题: