C++ 动态创建二维数组

//动态创建二维字符数组arr[m]

char **arr;
arr = new char*[m]; //创建行指针
for (int i = 0; i<m; i++)
arr[i] = new char
; //为每行分配空间

for (int i = 0; i < m; i++)
{
for (int j = 0; j < n; j++)
{
arr[i][j] = '\0';
}
}