利用指针和迭代器遍历二维数组的2种方法

#include<iostream> using namespace std; int main() { int ia[3][4] = {1,2,3,4,5,6,7,8,9,10,11,12}; for (auto p = ia; p != ia + 3; p++) { for (auto q = *p; q != *p + 4; q++) cout << *q << ' '; cout << endl; } int ib[3][4] = { 2,4,6,8,10,12,14,16,18,20,22,24 }; for (auto p = begin(ib); p != end(ib); p++) { for (auto q = begin(*p); q != end(*p); q++) cout << *q << ' '; cout << endl; } return 0; } ia是用的指针，ib用的迭代器。