删除动态数组后堆损坏
heap corruption after deleting dynamic array
我知道这个问题被问了很多次,但我找不到解决我错误的方法我试着做一个程序来检查矩阵是否对称,用户输入测试用例的数量,然后大小,然后矩阵和输出是否对称程序工作正常,直到我尝试大于3的大小,它中断了这个错误,当调试时,它似乎在delete[]arrL
时中断了#include <iostream>
#include <string>
using namespace std;
int n(char s)
{
switch (s)
{
case '0':
return 0;
case '1':
return 1;
case '2':
return 2;
case '3':
return 3;
case '4':
return 4;
case '5':
return 5;
case '6':
return 6;
case '7':
return 7;
case '8':
return 8;
case '9':
return 9;
}
}
int getnumber(string a)
{
string num = "";
for (int i = 0; i < a.size(); i++)
{
if (isdigit(a[i]))
num += a[i];
}
if (num.size() == 1)
{
return n(num[0]);
}
if (num.size() == 2)
{
return (n(num[0]) * 10) + (n(num[1]));
}
if (num.size() == 3)
{
return (n(num[0]) * 100) + (n(num[1]) * 10) + (n(num[2]));
}
}
bool matrix2(long int**p, int r)
{
int c = 0, u = 0, ss = 0;
for (int i = 0; i < r; i++)
{
for (int j = 0; j < r; j++)
{
if (p[i][j]<0)
return false;
}
}
long int*arrL = new long int[r];
long int*arrR = new long int[r];
for (int i = 0; i < r; i++)
{
for (int j = 0; j < i; j++)
{
arrL[c++] = p[i][j];
ss++;
}
}
for (int i = 0; i < r; i++)
{
for (int j = i + 1; j < r; j++)
{
arrR[u++] = p[i][j];
}
}
for (int i = 0; i < ss; i++)
{
int q = ss - i - 1;
long int a = arrR[i];
long int b = arrL[q];
if (!(a == b))
{
delete[]arrL;
delete[]arrR;
return false;
}
}
delete[]arrL;
delete[]arrR;
return true;
}
int main()
{
int t;
cin >> t;
for (int num = 0; num < t;num++)
{
int yy = num + 1;
string dimension;
cin.ignore();
getline(cin, dimension);
int r = getnumber(dimension);
long int**p = new long int*[r];
for (int w = 0; w < r; w++){
p[w] = new long int[r];
}
for (int w = 0; w < r; w++)
{
for (int ww = 0; ww < r; ww++)
{
cin >> p[w][ww];
}
}
bool result = matrix2(p, r);
if (result)
{
cout << "Test #" << yy << ": Symmetric." << endl;
}
else
{
cout << "Test #" << yy << ": Non-symmetric." << endl;
}
for (int i = 0; i < r; i++)
{
delete[]p[i];
}
delete[] p;
}
return 0;
}
arrL和arrR被分配的大小为r,但随后arrL[c++] = p[i][j];执行了超过r次,所以c超过r,所以你已经损坏了堆
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