79 lines
1.5 KiB
C++
79 lines
1.5 KiB
C++
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//given two matrices of sizes n*m and n1*m1
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//find multiplication of the two matrices and print it
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#include <bits/stdc++.h>
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using namespace std;
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int main()
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{
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int n,m,n1,m1;
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// cout<<"Enter the dimensions of first matrix\n";
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cin>>n>>m;
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int a[n][m];
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// cout<<"Enter the elements of first matrix\n";
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for(int i=0;i<n;i++)
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{
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for(int j=0;j<m;j++)
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{
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cin>>a[i][j];
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}
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}
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//cout<<"Enter the dimensions of Second matrix\n";
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cin>>n1>>m1;
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int b[n1][m1];
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//cout<<"Enter the elements of second matrix\n";
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for(int i=0;i<n1;i++)
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{
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for(int j=0;j<m1;j++)
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{
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cin>>b[i][j];
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}
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}
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if(m!=n1)
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{
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cout<<"Multiplication of the matrices is not possible";
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}
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else
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{
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int c[n][m1];
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for(int i=0;i<n;i++)
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{
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for(int j=0;j<m1;j++)
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{
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c[i][j]=0;
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}
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}
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for(int i=0;i<n;i++)
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{
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for(int j=0;j<m1;j++)
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{
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for(int k=0;k<n1;k++)
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{
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c[i][j]+=a[i][k]*b[k][j];
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}
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}
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}
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for(int i=0;i<n;i++)
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{
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for(int j=0;j<m1;j++)
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{
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cout<<c[i][j]<<" ";
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}
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cout<<"\n";
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}
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}
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return 0;
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}
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//INPUT
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//2 3
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//1 2 1
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//3 4 1
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//3 2
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//1 2
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//1 1
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//3 7
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//OUTPUT
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//6 11
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//10 17
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//TIME COMPLEXITY OF THE PROGRAM
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//O(n^3)
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