[C++知识库]c++ 数组array和多元数组tuple

array

数组初始化
int *p =(int[]){1,3,3,4,5});//C风格
int a[5]{1,2,3,4,5};//栈上
int *p(new int[5]{1,3,3,4,5});//堆上

#include <iostream>
#include <array>

int main(int argc, const char * argv[]) 
{    
    int *p = new int[5]{5, 4, 3, 2, 1};
    for (int i =0; i<5; i++) {
        cout<<p[i];
    }
    cout<<endl;
    int a[5]{5, 4, 3, 2, 1};
    for (int i = 0; i<5; i++) {
        cout<<a[i];
    }
    cout<<endl;

    for(auto i : a){
        cout<< i;
    }
    cout<<endl;
    
    array<int, 10> cppArray {10, 9, 8, 7, 6, 5,4,3,2,1};
    for (auto i : cppArray){
        cout<<i<<"   "<<&cppArray[i]<<endl;
    }
    cout<<endl;
    
    array<int, 10> cppArray1 {10, 9, 8, 7, 6, 5,4,3,2,1};
    array<int, 10> cppArray2 {10, 9, 8, 7, 6, 5,4,3,2,1};
    array<int, 10> cppArray3 {10, 9, 8, 7, 6, 5,4,3,2,1};
    
    array<array<int, 10>, 3> mutiArray {cppArray1, cppArray2, cppArray3};
    for(auto j : mutiArray) {
        for(auto i : j){
            cout<< i << " ";
        }
        cout <<endl;
    }
    cout<<endl<<endl;
    
    array<array<int, 10>, 3> mutiArray1 {cppArray1, cppArray2, cppArray3};
    array<array<int, 10>, 3> mutiArray2 {cppArray1, cppArray2, cppArray3};
    array<array<int, 10>, 3> mutiArray3 {cppArray1, cppArray2, cppArray3};

    array<array<array<int, 10>, 3>, 3> muti3Array {mutiArray1, mutiArray2, mutiArray3};
    for(auto j : muti3Array) {
        for(auto i : j){
            for(auto h : i){
                cout<< h << " ";
            }
            cout <<endl;
        }
        cout <<endl;
    }
   
    return 0;
}

tuple多元数组

多元数组无法用auto遍历

#include <tuple>

char a = 'x';
short b = 13;
int c = 125;
double d = 3.14;
char *p("poniter");
tuple<char, short, int, double, char*> mytuple();
cout << get<0>(mytuple)<<endl<<get<1>(mytuple)<<endl<<get<2>(mytuple);