C++11:数组的输出

#include 
using namespace std;

using array_alias = int[4]; //typedef int array_def[4];
typedef int (*array_def)[4]; //using array_alias = int (*)[4]
int main()
{
    constexpr size_t rowCnt = 3, colCnt = 4;
    int ia[rowCnt][colCnt] = {};
    
    //1.原始方法
    for(int i = 0; i !=rowCnt; i++)
        for(int j = 0; j != colCnt; j++)
            cout <a
    for(int (*p)[4] = ia; p != ia +3; p++)
        for(int* q = *p; q != *p + 4; q++)
            cout <<*q;
    cout << endl;

    for(array_def p = ia; p != ia +3; p++)
        for(int* q = *p; q != *p + 4; q++)
            cout <<*q;
    cout << endl;

    for(array_alias* p = ia; p != ia +3; p++)
        for(int* q = *p; q != *p + 4; q++)
            cout <<*q;
    cout << endl;

    for(auto p = ia; p != ia +3; p++)
        for(auto q = *p; q != *p + 4; q++)
            cout <<*q;
    cout << endl;

    //6.
    for(int (*p)[4] = begin(ia); p != end(ia); p++)
        for(int* q = begin(*p); q != end(*p); q++)
            cout <<*q;
    cout << endl;

    for(auto p = begin(ia); p != end(ia); p++)
        for(auto q = begin(*p); q != end(*p); q++)
            cout <<*q;
    cout << endl;
    
    //
    
    for(decltype(ia[0]) row : ia)
        for(auto col : row)
            cout << col;
    cout << endl;
    
    for(int (&row)[4] : ia)
        for(auto col : row)
            cout << col;
    cout << endl;
    
    for(array_alias& row : ia)
        for(auto col : row)
            cout << col;
    cout << endl;

    for(auto& row : ia)
        for(auto col : row)
            cout << col;
    cout << endl;

    return 0;
}