Question

MUST BE PROCEDURAL CODE. Write a program in C++ that reads two matrices and: 1) adds them (if compatible) and prints their sum, 2) subtracts them (if compatible) and prints their difference, and 3) multiplies them (if compatible) and prints their product. Prompt the user for the names of two matrix input files (see format below) and place the output in a file of the user’s choosing.

The format of the input files should contain the number of rows, followed by the number of columns, followed by the matrix data; here is an example of a 2 by 3 matrix input file:

2 3

1 -1 0

2 0 1

Although the examples here use integers as elements of matrices, your code should allow matrices to contain doubles.

Here is an example of the output expected:

Matrix A =

1 -1 0

2 1 1

0 -1 1

Matrix B =

1 -2 1

0 1 0

1 -1 1

A + B =

2 -3 1

2 2 1

1 -2 2

A - B =

0 1 -1

2 0 1

-1 0 0

A * B =

1 -3 1

3 -4 3

1 -2 1

Answer 1

I have added the code below !

It is a procedural code having different functions for different procedures !

Comments are added to signify which operation is being performed !

For taking input, I have displayed proper msgs to the user to explain what value is needed next !

Fuctions are performed in this order -

1) Addition

2) Subtraction

3) Multiplication

CODE :

#include <iostream>
using namespace std;

double matA[100][100];
double matB[100][100];
double addResult[100][100];
double subResult[100][100];
double mulResult[100][100];

void displayMatrix(double mat[][100], int row, int col){
  
for(int i=0; i<row; i++){
for(int j=0; j<col; j++){
cout<<mat[i][j];
cout<<" ";
}
cout<<endl;
}
cout<<endl;
  
}

void addMatrices(int Arow, int Acol, int Brow, int Bcol){
  
//addition
  
if(Arow != Brow || Acol != Bcol){
cout<<"The two input matrices are not capable of addition";
}
else{
  
for(int i=0; i<Arow; i++){
for(int j=0; j<Acol; j++){
addResult[i][j]=matA[i][j]+matB[i][j];
}
}
  
cout<<"A + B ="<<endl;
displayMatrix(addResult, Arow, Acol);
}
  
}

void subtractMatrices(int Arow, int Acol, int Brow, int Bcol){
  
//subtraction
  
if(Arow != Brow || Acol != Bcol){
cout<<"The two input matrices are not capable of subtraction";
}
else{
  
for(int i=0; i<Arow; i++){
for(int j=0; j<Acol; j++){
subResult[i][j]=matA[i][j]-matB[i][j];
}
}
  
cout<<"A - B ="<<endl;
displayMatrix(subResult, Arow, Acol);
}
  
}

void multiplyMatrices(int Arow, int Acol, int Brow, int Bcol){
  
//multiply
  
if(Acol != Brow){
cout<<"The two input matrices are not capable of multiplication";
}
  
else{
  
for(int i=0; i<Arow; i++){
for(int j=0; j<Brow; j++){
mulResult[i][j]=0;
for(int k=0; k<Acol; k++){
mulResult[i][j] += (matA[i][k] * matB[k][j]);
}
}
}
  
cout<<"A * B ="<<endl;
displayMatrix(mulResult, Arow, Bcol);
}
  
}

int main() {
  
int Arow, Acol;
cout<<"Please enter the number of rows for matrix A";
cin>>Arow;
cout<<"Please enter the number of coloumns for matrix A";
cin>>Acol;
  
cout<<"Please enter the elements for the matrix A";
for(int i=0; i<Arow; i++){
for(int j=0; j<Acol; j++){
cin>>matA[i][j];
}
}
  
int Brow, Bcol;
cout<<"Please enter the number of rows for matrix B";
cin>>Brow;
cout<<"Please enter the number of coloumns for matrix B";
cin>>Bcol;
  
cout<<"Please enter the elements for the matrix B";
for(int i=0; i<Brow; i++){
for(int j=0; j<Bcol; j++){
cin>>matB[i][j];
}
}
  
//display
cout<<endl;
cout<<"Matrix A ="<<endl;
for(int i=0; i<Arow; i++){
for(int j=0; j<Acol; j++){
cout<<matA[i][j];
cout<<" ";
}
cout<<endl;
}
cout<<endl;
  
cout<<"Matrix B ="<<endl;
for(int i=0; i<Brow; i++){
for(int j=0; j<Bcol; j++){
cout<<matB[i][j];
cout<<" ";
}
cout<<endl;
}
cout<<endl;
  
  
//addition
  
addMatrices(Arow, Acol, Brow, Bcol);
  
  
//subtraction
  
subtractMatrices(Arow, Acol, Brow, Bcol);
  
  
//multiply
  
multiplyMatrices(Arow, Acol, Brow, Bcol);
  
return 0;
  
}