1 reply to this topic

[Apprentice123]

How do I transform a vector in a two-dimensional array ?


I try:

vector<int> v;
v.push_back(0)
v.push_back(1)
v.push_back(2)
v.push_back(3)
v.push_back(4)
v.push_back(5)
v.push_back(6)
v.push_back(7)
v.push_back(8)


int m[3][3] = {(v[0], v[1], v[2]),
               (v[3], v[4], v[5]),
               (v[6], v[7], v[8])};


for(int i=0; i<3; i++){
            for(int j=0; j<3; j++)
                    cout << m[i][j] << "  ";
                    }

But the output is: 7 8 6 0 0 0 0 0 0


Why ??

[fayyazlodhi]

Replace () with {}. Array indexes are accessed by braces. There is no meaning of parenthesis there.

vector<int> v;

v.push_back(0);

v.push_back(1);

v.push_back(2);

v.push_back(3);

v.push_back(4);

v.push_back(5);

v.push_back(6);

v.push_back(7);

v.push_back(8);



int m[3][3] = { {v[0], v[1], v[2]},

             {v[3], v[4], v[5]},

             {v[6], v[7], v[8]}};


for(int i=0; i<3; i++){

            for(int j=0; j<3; j++)

                    cout << m[i][j] << "  ";

                    }