Two Matrics are to be multiplied. If A is an nxm matrix and
B is an mxp matrix, the result AB of their multiplicaiotn is an nxp matrix
defined only if the number of columns m in A is equal to the number of rows m
in B.
Basically when we multiply matrices, the number of the rows
in the first matrix are multiplied with corresponding columns in the second
matrix. One may compute each entry in the third matrix one at a time.
#include<iostream>
using namespace std;
void main()
{
int
q,w,e,s,d,f,x,c,v;
int
a[3][3];
int
b[3][3];
cout<<"
enter values of matrices A "<<endl;
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
cin>>a[i][j];
}
}
cout<<" matrices A "<<endl;
for(int i=0;i<3;i++)
{
cout<<"[ ";
for(int j=0;j<3;j++)
{
cout<<a[i][j]<<" ";
}
cout<<"] \n";
}
cout<<endl;
cout<<"plz enter value of matrices B"<<endl;
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
cin>>b[i][j];
}
}
cout<<" matrices B
"<<endl;
for(int i=0;i<3;i++)
{
cout<<"[ ";
for(int j=0;j<3;j++)
{
cout<<b[i][j]<<" ";
}
cout<<"]
\n\n";
}
cout<<" resultant"<<endl;
q=((a[0][0]*b[0][0])+(a[0][1]*b[1][0])+(a[0][2]*b[2][0]));
w=((a[0][0]*b[0][1])+(a[0][1]*b[1][1])+(a[0][2]*b[2][1]));
e=((a[0][0]*b[0][2])+(a[0][1]*b[1][2])+(a[0][2]*b[2][2]));
s=((a[1][0]*b[0][0])+(a[1][1]*b[1][0])+(a[1][2]*b[2][0]));
d=((a[1][0]*b[0][1])+(a[1][1]*b[1][1])+(a[1][2]*b[2][1]));
f=((a[1][0]*b[0][2])+(a[1][1]*b[1][2])+(a[1][2]*b[2][2]));
x=((a[2][0]*b[0][0])+(a[2][1]*b[1][0])+(a[2][2]*b[0][0]));
c=((a[2][0]*b[0][1])+(a[2][1]*b[1][1])+(a[2][2]*b[2][1]));
v=((a[2][0]*b[0][2])+(a[2][1]*b[1][2])+(a[2][2]*b[2][2]));
int
r[3][3]={{q,w,e},{s,d,f},{x,c,v}};
for(int i=0;i<3;i++)
{
cout<<"[ ";
for(int j=0;j<3;j++)
{
cout<<r[i][j]<<" ";
}
cout<<"] \n";
}
}
Output:
| Follow @computercolumns | ||||
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