How It Works:
- Two const variables row and col are used to define size.
- if we do not make both const then error found because without const reserve word they are behaving as variable.
- Before placing both variable in square brackets they must initialized else error will be found.
- 3 nested for loops are used two for taking input in matrix 2D arrays and one for resultant matrix.
Here is the program for addition of two matrix in C++
CODE:
#include<iostream>
using namespace std;
int main(){
//Using const int for array size
const int row=2,col=2;
// if not use const error found
cout<<"Size of Matrices : "<<row<<" X "<<col<<endl;
cout<<"Enter Value For First Matrix:"<<endl;
int first[row][col], second[row][col];
int i,j;
for( i=0;i<row;i++){
cout<<"Enter value for row number: "<<i+1<<endl;
for( j=0;j<col;j++){
cin>>first[i][j];
}
}
cout<<"nnnEnter Value For Second Matrix:"<<endl;
for( i=0;i<row;i++){
cout<<"Enter value for row number: "<<i+1<<endl;
for( j=0;j<col;j++){
cin>>second[i][j];
}
}
// Resultant Matrix
for( i=0;i<row;i++){
for( j=0;j<col;j++){
first[i][j]=first[i][j]+second[i][j];
}
}
cout<<"nnttResultant Matrix:"<<endl;
for( i=0;i<row;i++){
cout<< endl;
for( j=0;j<col;j++){
cout<<"tt"<<first[i][j]<<" ";
}
}
return 0;
}