Thread: Print vector of vector

Hi everyone,

I am trying to do a map so i can build a game.

My ideia was to use a vector of vector.

I want to make a function to print the map but i don´t know how, i am just able to print the map inside the construtor.

Code:

class Map
{
public:
    Map(int);
    void printf(const vector <vector<int>> & );

private:    
    vector <vector <int> > m_map;  // Could this be just map ?
};

Code:

map.cpp

#pragma once
#include <iostream>
#include <vector>
#include "Map.h"

using namespace std;


Map::Map(int size) {    
    
    if (size < 10) {
        cout << "size to small, need to be at least 10x10" << endl;
        return;
        //TODO output to console
    }
    cout << "size is ok, going to create it" << endl;
    


    vector <vector <int> > map;
    // Vector of vector
    for (int i = 0; i < size; i++) {
        vector<int> temp;
        for (int j = 0; j < size; j++) {
            temp.push_back(i);
        }
        map.push_back(temp);
    }


    // Need to make in separete code.
    for (unsigned int i = 0; i < map.size(); i++) {
        for (unsigned int j = 0; j < map.size(); j++) {
            cout << map[i][j];
        }
        cout << endl;
    }
}

//void Map::printf(const vector <vector<int>>& map){
//    for (unsigned int i = 0; i < map.size(); i++) {
//        for (unsigned int j = 0; j < map.size(); j++) {
//            cout << map[i][j];
//        }
//        cout << endl;
//    }
//}

Code:

int main() {
    Map myMap(22);

    myMap.printf(myMap);
    getchar();
    return 1;
}

The error i got is the following.
no suitable user-defined conversion from "Map" to "const std::vector<std::vector<int, std::allocator<int>>,

Your printf method shouldn't take any parameters, all of a class's members are directly accessible from inside its methods.

This looks like a nice assignment. If your teacher has provided you with the functions necessary to write directly to parts of the console( something like gotoxy() ), then it's just a matter of laying out the tiles. You could have different numerical values for different tile types, preferably with the use of an enum. Then it would be as simple as looping through all of the map's tiles and printing the appropriate color with the use of a switch statement. Like this:

Code:

// gotoxy(i, j)
switch (tile)
{
case Tile::Yellow:
    // set current color to yellow
break;
case Tile::White:
    // set current color to white
break;
// More cases may go here
}
// print tile