c++ - Runtime check failure #2 - Stack around variable was corrupted -

i'm attempting make program transpose (2 x 2) matrix using 2-dimensional array. besides runtime failure i'm having issue in inputting integer value index [0][1], value of [1][0] going index [0][1] [1][0]. value of [0][0] , [1][1] inputted cin keyword when asked during execution. didn't seem receive compilation errors should worry me either. added stdio header well, in case may somehow or anything.

#include "iostream" #include "stdio.h" #include "conio.h" using namespace std; class transpose {     public:         int m[1][1], te;         void input();         void process();         void output(); }; void transpose::input() {     cout << "matrix format:"<< endl << "[a b]" << endl << "[c d]" << endl;     cout << "enter a: ";     cin >> m[0][0];     cout << "enter b: ";     cin >> m[0][1];     cout << "enter c: ";     cin >> m[1][0];     cout << "enter d: ";     cin >> m[1][1];     cout << "entered matrix:" << endl << "[" << m[0][0] << " " << m[0][1] << "]" << endl;     cout << "[" << m[1][0] << " " << m[1][1]<<"]" << endl; } void transpose::process() {     te = m[0][1];     m[0][1] = m[1][0];     m[1][0] = te; } void transpose::output() {     cout << "transposed matrix:" << endl << "[" << m[0][0] << " " << m[0][1] << "]" << endl;     cout << "[" << m[1][0] << " " << m[1][1] << "]"; } void main() {     class transpose t;     t.input();     t.process();     t.output();     _getch(); } 

the output i'm getting during execution (within debugging mode of vs 2013) is: http://screencloud.net/v/gbqp

nb: runtime error popup occurs after press character program complete execution [i.e. after press key @ _getch() command].

i tried searching previous stack variable corruption examples couldn't find way remove error.

your matrix 1 1, using if 2 2:

m[0][1]; // valid index 0 

this out of bounds access undefined behaviour. need fix that.