get function not returning what i expect - c++

Question

I am trying to create a get function in my class to return that will take i, j argument and return the value of what is located at Object(i, j).
So far in my get function it is converting i, j to its equivalent in a 1d array by i * (number of columns) + j, which in my code would equal 5.
Next I want to show what value is at location 5 in my array. However it seems to return the first value of my array, not the location 5 value. Any ideas to where I am going wrong? am I using the pointer in the wrong way? My full program is below:
#include <iostream>
using namespace std;
class MyMatrix{
public:
//default constructor set member variables to null states
MyMatrix();
MyMatrix(int sizeR, int sizeC, double * input_data);
~MyMatrix(); //destructor
//member functions
int get(int i, int j);
private:
int m; //rows
int n; //columns
double * data;
};
int main(){
const int rows = 3;
const int columns = 2;
double * userInput;
cout << "The array is 3*2, or 6 elements." << endl;
userInput = new double[rows*columns];
double temp;
for (int i = 0; i < rows*columns; i++){ //let the user type in the array
cout << "Please enter value" << i << endl;
cin >> temp;
*(userInput + i) = temp;
}
MyMatrix ObjectA(rows, columns, userInput); //creating object with specifications
cout << "The value of ObjectA 2,1 is: " << ObjectA.get(2, 1) << endl;
return 0;
}
MyMatrix::MyMatrix(){
cout << "MyMatrix constructor lets go" << endl;
m = 0;
n = 0;
data = 0;
}
MyMatrix::MyMatrix(int sizeR, int sizeC, double * input_data){
cout << "MyMatrix::MyMatrix(int sizeR, int sizeC, double * input_data) is called." << endl; //Showing the constructor working :)
m = sizeR;
n = sizeC;
data = new double[m*n];
for (int i = 0; i < m*n; i++){
data[i] = *input_data;
}
cout << "The items you have entered are:" << endl; //printing out array showing the array is filled
for (int i = 0; i < m*n; i++){
cout << i << "item is: " << *(input_data + i) << endl;
}
}
int MyMatrix::get(int i, int j){
cout << "getFunction is happening" << endl;
//val should just be K [K = i * N + j]
int val = 0;
val = i * n + j; //n is COLUMNS, m is ROWS derp
cout << "val is equal to: " << val << endl; //so val would be 5
//how do i get it to display what is at location 5 in object A
return data[val]; // shouldnt this return the 5th element in data?
}
MyMatrix::~MyMatrix(){
cout << "MyMatrix::~MyMatrix() is invoked" << endl; //showing DESTRUCTA function is working
delete[] data; //the memory management
}

Answer 1

Use data[i] = input_data[i] instead data[i] = *input_data, and add delete [] userInput to free memory or you will memory leak.