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- //Умножение матриц
- #include <iostream>
- using namespace std;
- int main()
- {
- int a[10][10], b[10][10], mult[10][10], r1, c1, r2, c2, i, j, k;
- cout << "Enter rows and columns for first matrix: ";
- cin >> r1 >> c1;
- cout << "Enter rows and columns for second matrix: ";
- cin >> r2 >> c2;
- /* If colum of first matrix in not equal to row of second matrix, asking user to enter the size of matrix again. */
- while (c1!=r2)
- {
- cout << "Error! column of first matrix not equal to row of second.";
- cout << "Enter rows and columns for first matrix: ";
- cin >> r1 >> c1;
- cout << "Enter rows and columns for second matrix: ";
- cin >> r2 >> c2;
- }
- /* Storing elements of first matrix. */
- cout << endl << "Enter elements of matrix 1:" << endl;
- for(i=0; i<r1; ++i)
- for(j=0; j<c1; ++j)
- {
- cout << "Enter element a" << i+1 << j+1 << " : ";
- cin >> a[i][j];
- }
- /* Storing elements of second matrix. */
- cout << endl << "Enter elements of matrix 2:" << endl;
- for(i=0; i<r2; ++i)
- for(j=0; j<c2; ++j)
- {
- cout << "Enter element b" << i+1 << j+1 << " : ";
- cin >> b[i][j];
- }
- /* Initializing elements of matrix mult to 0.*/
- for(i=0; i<r1; ++i)
- for(j=0; j<c2; ++j)
- {
- mult[i][j]=0;
- }
- /* !!!Само умножение: Multiplying matrix a and b and storing in array mult. */
- for(i=0; i<r1; ++i)
- for(j=0; j<c2; ++j)
- for(k=0; k<c1; ++k)
- {
- mult[i][j]+=a[i][k]*b[k][j];
- }
- /* Displaying the multiplication of two matrix. */
- cout << endl << "Output Matrix: " << endl;
- for(i=0; i<r1; ++i)
- for(j=0; j<c2; ++j)
- {
- cout << " " << mult[i][j];
- if(j==c2-1)
- cout << endl;
- }
- return 0;
- }
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