# C++ Program To Multiply Two Matrices

## Introduction

I have used CodeBlocks compiler for debugging purpose. But you can use any C++ programming language compiler as per your availability.

``````#include <iostream>
using namespace std;

int main()
{
int a[10][10], b[10][10], result[10][10], r1, c1, r2, c2, i, j, k;

cout<<"Enter rows and column for first matrix: ";
cin>>r1;
cin>>c1;

cout<<"Enter rows and column for second matrix: ";
cin>>r2;
cin>>c2;

// Column of first matrix should be equal to column of second matrix and
while (c1 != r2)
{
cout<<"Error! column of first matrix not equal to row of second.\n\n";
cout<<"Enter rows and column for first matrix: ";
cin>>r1;
cin>>c1;
cout<<"Enter rows and column for second matrix: ";
cin>>r2;
cin>>c2;
}

// Storing elements of first matrix.
cout<<"\nEnter elements of matrix 1:\n";
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<<"\nEnter elements of matrix 2:\n";
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 all elements of result matrix to 0
for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
{
result[i][j] = 0;
}

// Multiplying matrices a and b and
// storing result in result matrix
for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
for(k=0; k<c1; ++k)
{
result[i][j]+=a[i][k]*b[k][j];
}

// Displaying the result
cout<<"\nOutput Matrix:\n";
for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
{
cout<<" "<<result[i][j];
if(j == c2-1)
cout<<"\n\n";
}
return 0;
}
``````

# Result

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TaggedWrite C Program to Multiply Two Matrices

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