声明连续的二维数组指针 [英] Declaring contiguous 2D array pointer

问题描述

我已经学会了使用指针来声明动态二维数组.但是我被告知这不会创建一个连续的二维数组.

I have learnt to declare a dynamic 2D array using a pointer as such. However I was told this does not create a contiguous 2D array.

int **p;
p = new int*[M];
for (int i = 0; i < M; ++i) {
    p[i] = new int[N]; }

修改代码以创建指向连续二维数组的动态指针的方法是什么?

What is the way to modify the code to create a dynamic pointer to a contiguous 2D array?

推荐答案

试试这个

int **p= new int*[rows];
int size= rows*cols;
p[0]= new int[size];
for(int i= 1; i < rows; i++) {
    p[i]= &p[0][i*cols];
}

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