SquareMatrix 的 ADT 构造函数有什么问题？

我为了创建一个方阵ADT对象而编写的这个项目的构造函数(不是默认构造函数)有问题。我已经将问题追溯到构造函数，但我无法弄清楚它出了什么问题，每次我尝试在 main .cpp 中运行测试时都会崩溃。

我通常会收到一个错误，上面写着"线程 1：EXC_BAD_ACCESS：..."控制台通常说"(11db)">

有没有人对可能导致所有问题的原因有任何想法？

这是头文件：

#include <iostream>
#include <vector>
using namespace std;
#ifndef SquareMatrix_h
#define SquareMatrix_h
class SquareMatrix {
private:
vector<vector<double>> numMatrix;
public:
SquareMatrix();
SquareMatrix(vector<vector<double>>& v2d);
double getValue(int x, int y);
void setValue(int x, int y, double value);
friend SquareMatrix operator * (SquareMatrix m1, SquareMatrix m2);
friend SquareMatrix operator - (SquareMatrix m1, SquareMatrix m2);
friend ostream& operator <<(ostream &out, SquareMatrix m);
};
#endif /* SquareMatrix_h */

这是我的SquareMatrix.cpp文件：(我认为不起作用的构造函数是代码中的第二个函数：SquareMatrix：：SquareMatrix(vector>& v2d) {...)

#include "SquareMatrix.h"
#include <iostream>
using namespace std;
SquareMatrix::SquareMatrix() {
numMatrix.clear();
for(int i = 0; i < 10; i++) {
vector<double> initial;
for(int j = 0; j < 10; j++) {
initial.push_back(0.0);
}
numMatrix.push_back(initial);
}
}
SquareMatrix::SquareMatrix(vector<vector<double>>& v2d) {
bool flagSize = true;
for(int i = 0; i < v2d.size(); i++) {
if(v2d[i].size() != v2d.size()) {
flagSize = false;
break;
}
}
if(flagSize) {
numMatrix.clear();
for(int i = 0; i < v2d.size(); i++) {
vector<double> initial;
for(int j = 0; j < v2d[i].size(); i++) {
initial.push_back(v2d[i][j]);
}
numMatrix.push_back(initial);
}
} else {
numMatrix.clear();
for(int i = 0; i < 10; i++) {
vector<double> initial;
for(int j = 0; j < 10; j++) {
initial.push_back(0.0);
}
numMatrix.push_back(initial);
}
}
}
double SquareMatrix::getValue(int x, int y) {
if((x < numMatrix.size()) && (y < numMatrix.size()) && (x >= 0) && (y >= 0)) {
return numMatrix[x][y];
}
return 0;
}
void SquareMatrix::setValue(int x, int y, double value) {
if((x < numMatrix.size()) && (y < numMatrix.size()) && (x >= 0) && (y >= 0)) {
numMatrix[x][y] = value;
}
}
SquareMatrix operator * (SquareMatrix m1, SquareMatrix m2) {
if(m1.numMatrix.size() == m2.numMatrix.size()) {
vector<vector<double>> result;
for(int i = 0; i < m1.numMatrix.size(); i++) {
vector<double> initial;
for(int j = 0; j < m1.numMatrix.size(); j++) {
initial.push_back(0);
}
result.push_back(initial);
}
for(int i = 0; i < m1.numMatrix.size(); i++) {
for(int j = 0; j < m1.numMatrix.size(); j++) {
result[i][j] = 0;
for (int a = 0; a < m1.numMatrix.size(); a++) {
result[i][j] += m1.numMatrix[i][a] + m2.numMatrix[a][j];
}
}
}
return SquareMatrix(result);
}
return SquareMatrix();
}
SquareMatrix operator - (SquareMatrix m1, SquareMatrix m2) {
if(m1.numMatrix.size() == m2.numMatrix.size()) {
vector<vector<double>> result;
for(int i = 0; i < m1.numMatrix.size(); i++) {
vector<double> initial;
for(int j = 0; j < m1.numMatrix[i].size(); j++) {
double pushNum = (m1.getValue(i,j) - m2.getValue(i,j));
initial.push_back(pushNum);
} 
result.push_back(initial);
}
return SquareMatrix(result);
}
return SquareMatrix();
}
ostream& operator << (ostream &out, SquareMatrix m) {
out << "(";
for (int i = 0; i < m.numMatrix.size(); i++) {
for (int j = 0; j < m.numMatrix.size(); j++) {
out << " " << m.numMatrix[i][j];
if(j != (m.numMatrix.size() - 1)) {
out << ", ";
}
}
}
out << ")";
return out;
}

然后这是我用来测试SquareMatrix ADT对象的主要.cpp：

#include "SquareMatrix.h"
#include <iostream>
#include <random>
#include <ctime>
#include <vector>
using namespace std;
int main() {
srand(time(NULL));
vector<vector<double>> m1;
vector<vector<double>> m2;
int size = 0;
cout << "Enter the size of the Square Matrix: ";
cin >> size;
for (int i = 0; i < size; i++) {
vector<double> in1;
vector<double> in2;
for (int j = 0; j < size; j++) {
in1.push_back(rand() % 100);
in2.push_back(rand() % 100);
}
m1.push_back(in1);
m2.push_back(in2);
}
SquareMatrix res1 = SquareMatrix(m1);
SquareMatrix res2 = SquareMatrix(m2);
cout<< "nMatrix 1: " << endl;
cout << res1 << endl;
cout<< "nMatrix 2: " << endl;
cout << res2 << endl;
SquareMatrix mult = res1*res2;
cout << "nMatrix1 * Matrix 2: " << endl;
cout << mult << endl;
SquareMatrix min1_2 = res1 - res2;
cout << "Matrix1 - Matrix 2: " << endl;
cout << min1_2 << endl;
SquareMatrix min2_1 = res2 - res1;
cout << "Matrix2 - Matrix 1: " << endl;
cout << min2_1 << endl;
return 0;
}

您能提供的任何帮助将不胜感激。 :)