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06-OOP.cpp
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06-OOP.cpp
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/*
Write the program to perform following operation on matrix using inline function, functions and switch case
a) Addition
b) Subtraction
c) Multiplication
d)Transpose
*/
#include <iostream>
using namespace std;
class matrix
{
public:
int rows;
int cols;
int matrix[10][10];
void takeInput();
void printMatrix();
};
inline int subtract(int num1, int num2)
{
return num1 - num2;
}
inline int add(int num1, int num2)
{
return num1 + num2;
}
inline int multiply(int num1, int num2)
{
return num1 * num2;
}
void subtractMatrices(matrix& a, matrix& b)
{
cout << "subtracting matrices \n";
matrix answer;
if (a.rows != b.rows || a.rows != b.rows)
{
cout << "matrices incompatible to be subtracted" << endl;
return;
}
else
{
answer.rows = a.rows;
answer.cols = a.cols;
}
for (int i = 0; i < a.rows; ++i)
{
for (int j = 0; j < a.rows; ++j)
{
answer.matrix[i][j] = subtract(a.matrix[i][j], b.matrix[i][j]);
}
}
answer.printMatrix();
}
void addMatrices(matrix& a, matrix& b)
{
cout << "adding matrices \n";
matrix answer;
if (a.rows != b.rows || a.rows != b.rows)
{
cout << "matrices incompatible to be added" << endl;
return;
}
else
{
answer.rows = a.rows;
answer.cols = a.cols;
}
for (int i = 0; i < a.rows; ++i)
{
for (int j = 0; j < a.rows; ++j)
{
answer.matrix[i][j] = add(a.matrix[i][j], b.matrix[i][j]);
}
}
answer.printMatrix();
}
void calculateTranspose(matrix& a)
{
cout << "transpose is : \n";
matrix answer;
answer.rows = a.cols;
answer.cols = a.rows;
for (int i = 0; i < answer.rows; ++i)
{
for (int j = 0; j < answer.cols; ++j)
{
answer.matrix[i][j] = a.matrix[j][i];
}
}
answer.printMatrix();
}
void multiplyMatrices(matrix& a, matrix& b)
{
cout << "multiplying matrices \n";
matrix answer;
if (a.rows != b.cols || a.cols != b.rows)
{
cout << "incompatible matrices "<< endl;
return;
}
else
{
answer.rows = a.rows;
answer.cols = b.cols;
}
for (int i = 0; i < answer.rows; ++i)
{
for (int j = 0; j < answer.cols; ++j)
{
int tmp = 0;
for (int k = 0; k < answer.rows; ++k)
{
tmp = add(tmp, multiply(a.matrix[i][k], b.matrix[k][j]));
}
answer.matrix[i][j] = tmp;
}
}
answer.printMatrix();
}
void matrix :: printMatrix()
{
for (int i = 0; i < rows; ++i)
{
for (int j = 0; j < cols; ++j)
{
cout << '[' << matrix[i][j] << "] ";
}
cout << endl;
}
}
void matrix :: takeInput()
{
cout << "enter the number of rows: ";
cin >> rows;
cout << "enter the number of cols: ";
cin >> cols;
for (int i = 0; i < rows; ++i)
{
for (int j = 0; j < cols; ++j)
{
cout << "enter the " << j + 1 << " element of the " << i + 1 << " row: ";
cin >> matrix[i][j];
}
}
}
int main()
{
matrix a, b;
cout << "enter details of first matrix "<< endl;
a.takeInput();
cout << "enter details of second matrix" << endl;
b.takeInput();
int flag;
do
{
cout << "\nenter 1 to add\nenter 2 to multiply a . b\nenter 3 to subtract b from a\nenter 4 to calculate transpose of a\nenter 5 to calculate transpose of b\nenter 6 to exit\n";
cin >> flag;
switch(flag)
{
case 1:
addMatrices(a, b);
break;
case 2:
multiplyMatrices(a, b);
break;
case 3:
subtractMatrices(a, b);
break;
case 4:
calculateTranspose(a);
break;
case 5:
calculateTranspose(b);
break;
case 6:
break;
default:
cout << "invalid input" << endl;
break;
}
}while(flag != 6);
}