c++ 题解

#include <random>
#include <iostream>
 
int main()
{
    int a[3][4] = {
        {1,2,3,4},
        {8,6,7,7},
        {12,4,6,10}};
    for (int n = 0; n < 3; ++n) {
        for (int m = 0;m<4;++m ){
            std::cout <<a[n][m]<< ‘ ‘<<std::endl;
        }
    }
    //int (*p)[4]  一个指针，指向含有4个元素的数组
    // int *p[4] 含有4个原素，每个元素都是int指针
    for(int (*p)[4] = a;p!=a+3;++p){
        for (int *m = *p;m!=*p+4;++m){
            
            std::cout <<*m<< ‘ ‘<<std::endl;

        }
    }
    //(int (&i)[4]  一个引用，指向含有4个元素的数组
    for(int (&i)[4]: a){
        for (int j : i)
            std::cout <<j<< ‘ ‘<<std::endl;
    }
}