71 lines
1.9 KiB
Plaintext
71 lines
1.9 KiB
Plaintext
#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 column of first matrix in not equal to row of second matrix,
|
|
// ask the 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;
|
|
}
|
|
|
|
// 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;
|
|
}
|