指向2d数组的指针 [英] pointer to 2d array

问题描述

最简单的说，什么是相当于这个java代码的c ++？


int map [] [];

map = new int [16 ] [16];

map [5] [5] = 3;

System.out.println（map [5] [5]）;


提前感谢。

解决方案

Mark写道：

放得最多简单地说，什么是相当于这个java代码的c ++？

int map [] [];
map = new int [16] [16];
map [5] [5] = 3;
System.out.println（map [5] [5]）;

#include< iostream>


int main（）

{

int map [16] [16] = {0};

map [5] [5] = 3;

std :: cout<< map [5] [5]<< " \ n";

}

Jonathan

Mark写道：

最简单的说，c ++相当于这个java代码是什么？

int map [] [];
map = new int [16] [16];
地图[5] [5] = 3;
System.out.println（地图[5] [5]）;

感谢
你可以使用vector来动态模拟它。

#include< iostream>

＃使用namspace std包含< vector>

;

.....


vector< vector< int> > MyMap（16，vector< int>（16））;

MyMap [5] [5] = 3;

cout<< MyMap [5] [5]<< endl;

Mark写道：

最简单的说，这个java代码的c ++是什么？

int map [] [];
map = new int [16] [16];
map [5] [5] = 3;
System.out.println（地图[5] [5]）;

提前谢谢。

就个人而言，我会


vector<矢量<诠释> > map;

map.resize（16）;

for（int i = 0; i< 16; ++ i）

map [i] .resize（16）;

map [5] [5] = 3;

cout<< map [5] [5]<<结束;


但这可能不是最简单的因为我正在使用STL。


-JJ

put most simply, what is the c++ equivalent to this java code?

int map[][];
map = new int[16][16];
map[5][5] = 3;
System.out.println(map[5][5]);

thanks in advance.

解决方案

Mark wrote:

put most simply, what is the c++ equivalent to this java code?

int map[][];
map = new int[16][16];
map[5][5] = 3;
System.out.println(map[5][5]);

# include <iostream>

int main()
{
int map[16][16] = {0};
map[5][5] = 3;
std::cout << map[5][5] << "\n";
}
Jonathan

Mark wrote:

put most simply, what is the c++ equivalent to this java code?

int map[][];
map = new int[16][16];
map[5][5] = 3;
System.out.println(map[5][5]);

thanks in advance.

You can use vector to simulate this dynamically.
#include <iostream>
#include <vector>
using namspace std;
.....

vector<vector<int> > MyMap(16, vector<int>(16));
MyMap[5][5] = 3;
cout << MyMap[5][5] << endl;

Mark wrote:

put most simply, what is the c++ equivalent to this java code?

int map[][];
map = new int[16][16];
map[5][5] = 3;
System.out.println(map[5][5]);

thanks in advance.

Personally, I would

vector< vector<int> > map;
map.resize( 16 );
for ( int i = 0; i < 16; ++i )
map[i].resize( 16 );
map[5][5] = 3;
cout << map[5][5] << endl;

But that might not be "most simply" since I''m using STL.

-JJ

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