This is my new code
the problem is in my matrix multiplication
and is this function as what my teacher want ???
#include <iostream>
using namespace std;
#include <cstdlib>
void fn(int **arr) {
}
void fn2 (int **arr2){
}
void fn3 (int **arr3){
}
int main() {
int r, c ,r2 , c2 , r3 , c3 , m , l;
cout << 'Enter size of row 1 : ' ;
cin >> r ;
cout << 'Enter size of column 1 : ' ;
cin >> c ;
cout <<'Enter matrix 1 please ' ;
int **arr = new int*[r];
for (int i = 0; i < r; i++)
arr[i] = new int[c];
for (int i=0 ; i<r ; i++){
for (int j=0 ; j<c ; j++)
cin >> arr[i][j] ;
}
for (int i=0 ; i<r ; i++){
for (int j=0 ; j<c ; j++)
cout << arr[i][j]<<' ' ;
cout << endl ;
}
cout << 'Enter size of row 2 : ' ;
cin >> r2 ;
cout << 'Enter size of column2 : ' ;
cin >> c2 ;
cout << 'Enter matrix 2 please ' ;
int **arr2 = new int*[r2];
for (int i = 0; i < r2 ; i++)
arr2[i] = new int[c2];
for (int i=0 ; i<r2 ; i++){
for (int j=0 ; j<c2 ; j++)
cin >> arr2[i][j] ;
}
for (int i=0 ; i<r2 ; i++){
for (int j=0 ; j<c2 ; j++)
cout << arr2[i][j] <<' ' ;
cout << endl ;
}
int **arr3 = new int*[r3];
for (int i = 0; i < r2 ; i++)
arr3[i] = new int[c];
if (c r2 ){
for (int i=0 ; i<r2 ; i++){
for (int j=0 ; j<c ; j++){
arr3[i][j]=0;
for(int k=0;k<c;k++)
arr3[i][j]=arr3[i][j]+(arr[i][k] * arr2[k][j]);
}
}
cout<<'your matrix is'<<endl;
for(int i=0;i<r3;i++){
for(int j=0;j<r3;j++){
cout<<arr3[i][j]<<' ';
}
cout<<endl;
}
}
else
cout << 'Error'<< endl ;
fn(arr);
fn2(arr2);
fn3(arr3);
return 0;
}