C++使用二级指针、三级指针给函数传参

#include<iostream>
using namespace std;
void fun_C(int a, int b, int **result)//以参数的形式传出（a,b）大小的二维数组
{
    for (int i = 0; i < a; ++i){
        for (int j = 0; j < b; ++j){
            result[i][j] = i + j;
        }
    }
}

int main()
    {
    int a = 2, b = 3;
    int **result; 
    //分配空间
    result = new int *[a];
    for (int i = 0; i<a; i++)
    {
        result[i] = new int[b];
    }
    
    fun_C(a, b, result);
    //打印
    for (int i = 0; i < a; ++i){
        for (int j = 0; j < b; ++j){
                cout << result[i][j]<<" " ;
        }
        cout << endl;
    }
    // 释放内存
    for (int i = 0; i<a; i++)
    {
        delete[] result[i];
    }
    delete[] result;
    return 0;
}

#include<iostream>
using namespace std;
void fun_C(int a, int b, int c, int ***result){
    for (int i = 0; i < a; ++i){
        for (int j = 0; j < b; ++j){
            for (int k = 0; k < c; ++k){
                result[i][j][k] = i+j+k;
            }
        }
    }
}
int main(){
    int a = 2, b = 3, c = 4;
    int ***result; 
    result = new int **[a];
    for (int i = 0; i<a; i++)
    {
        result[i] = new int *[b];
        for (int j = 0; j<b; j++)
            result[i][j] = new int[c];
    }
    
    fun_C(a, b,  c, result);
    for (int i = 0; i < a; ++i){
        for (int j = 0; j < b; ++j){
            for (int k = 0; k < c; ++k){
                cout << result[i][j][k]<<" " ;
            }
            cout << endl;
        }
        cout << endl;
    }
    // 释放内存
    for (int i = 0; i<a; i++)
    {
        for (int j = 0; j<b; j++)
        {
            delete[] result[i][j];
        }
    }
    for (int i = 0; i<a; i++)
    {
        delete[] result[i];
    }
    delete[] result;
    return 0;
}