Last active
October 31, 2018 06:45
-
-
Save afishr/1955a6093f693efccbecbacd89e6e73d to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
//matrix_multiplication | |
int main() | |
{ | |
int a, b, c, d; | |
// Entering the matrices dimensions | |
do | |
{ | |
cout << "M1 dimensions: "; | |
cin >> a >> b; | |
cout << "M2 dimensions: "; | |
cin >> c >> d; | |
if (b != c) | |
{ | |
cout << endl << "Matrices cannot be multiplicated" << endl; | |
cout << "Re-enter values or close program" << endl << endl; | |
} | |
} while (b != c); | |
// Creating and filling the matrices | |
auto** m1 = new int*[a]; | |
auto** m2 = new int*[c]; | |
auto** m3 = new int*[a]; | |
for (int i = 0; i < a; i++) | |
*(m1+i) = new int[b]; | |
for (int i = 0; i < c; i++) | |
*(m2+i) = new int[d]; | |
for (int i = 0; i < a; i++) | |
*(m3+i) = new int[d]; | |
cout << endl << "First matrix " << a << " x " << b << ": " << endl; | |
for (int i = 0; i < a; i++) | |
{ | |
for (int j = 0; j < b; j++) | |
cin >> *(*(m1+i)+j); | |
} | |
cout << endl << "Second matrix " << c << " x " << d << ": " << endl; | |
for (int i = 0; i < c; i++) | |
{ | |
for (int j = 0; j < d; j++) | |
cin >> *(*(m2+i)+j); | |
} | |
for (int i = 0; i < a; i++) | |
{ | |
for (int j = 0; j < d; j++) | |
*(*(m3+i)+j) = 0; | |
} | |
// ============= | |
for (int i = 0; i < a; i++) | |
{ | |
for (int j = 0; j < d; j++) | |
{ | |
for (int k = 0; k < b; k++) | |
{ | |
m3[i][j] += m1[i][k] * m2[k][j]; | |
} | |
} | |
} | |
cout << endl << "Resulting matrix: " << endl; | |
for (int i = 0; i < a; i++) | |
{ | |
for (int j = 0; j < d; j++) | |
cout << m3[i][j] << " "; | |
cout << endl; | |
} | |
// Freeing the memory | |
for (int i = 0; i < a; i++) | |
delete [] *(m1+i); | |
delete [] m1; | |
for (int i = 0; i < c; i++) | |
delete [] *(m2+i); | |
delete [] m2; | |
for (int i = 0; i < a; i++) | |
delete [] *(m3+i); | |
delete [] m3; | |
_getch(); | |
return 0; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment