Matrix problem of Classes in C++

/*
QUESTION:
A matrix is a two dimensional array. Create a class ‘matrix’ that contains two attributes

max_x and max_y of type int, that stores size of maximum columns and rows respectively. Add

another attribute of type int** to store the array.

Constructor should allow the program to specify the actual dimensions of the matrix and store it

to max_x and max_y, and define a two dimension array of the given size.

Member functions that access the data in the matrix will needed two index numbers: one for

each dimension in array.

Here what a fragment of main() program that operate on such class looks like:

matrix m1(3,4) // define a matrix object

int temp=1234; //define an int value

m1.putel(7,4,temp) //insert value of temp into matrix at 7,4 location,

//return true if temp is inserted and false if this location is out of bound

Temp=m1.gettel(7,4) // retrun value from matrix at 7,4 and display message if this given index

is out of bound.  

CODE;
*/

#include <iostream>

using namespace std;

class matrix{

private:

int max_x;

int max_y;

    int **ptr;

    

public:

matrix(){

max_x=0;

max_y=0;

ptr = NULL;

}

matrix(int x,int y){

max_x = x;

max_y = y;

ptr = new int *[max_x];

for(int i=0;i<max_x;i++)

ptr[i]= new int[max_y];

}

    bool putel(int  x,int y,int temp){

if(x  >max_x || y >max_y){

cout<<"\nOut of Bound: ";

return 0;

}

else{

ptr[x][y]= temp;

return 1;

}

}

int gettel(int x,int y){

if(x>max_x || y >max_y){

cout<<"\nOut of Bound: ";

return 0;

}

else 

return ptr[x][y];

}

};

int main(){

matrix m1(8,4);

int temp=1234;

m1.putel(4,4,temp);

temp = m1.gettel(4,4);

cout<<endl<<temp<<endl;

return 0;

}