I am designing a matrix class that performs addition, multicpication, substraction and division. When ever i complie the code it shows an error.
Code:
include <iostream>
using namespace std;
class matrix{
public:
matrix();
matrix(int m,int n);
int getRow();
int getCol();
double& operator()(int, int);
friend ostream& operator<<(ostream& os, matrix& m);
matrix operator + (matrix&);
matrix operator * (matrix&);
matrix operator - (matrix&);
matrix operator / (matrix&);
private:
void init(int, int);
int nrows,ncols;
double *data;
};
matrix::matrix(){
init(1,1);
}
matrix::matrix(int m, int n){
init(m,n);
}
void matrix::init(int m, int n){
nrows=m;
ncols=n;
data= new double[m*n];
for(int i=0; i<m*n; i++)
data[i]=0;
}
int matrix::getRow() { return nrows;}
int matrix::getCol() { return ncols;}
double& matrix::operator ()(int r, int c){
if (r <0 || r> nrows){
cout<<"Illegal row index";
return data[0];
}
else if (c <0 || c > ncols){
cout<<"Illegal Column Index:";
return data[0];
}
else return data[r*ncols+c];
}
ostream& operator<<(ostream& os, matrix &m){
int mval=m.getRow();
int nval=m.getCol();
for(int i=0; i<mval; i++){
for(int j=0; j < nval; j++)
os<<m(i,j);
os<<endl;
}
return os;
}
matrix matrix::operator+(matrix& a){
matrix sum(nrows, ncols);
for (int i=0; i<nrows; i++)
for(int j=0; j<ncols; j++)
sum(i,j) = (i,j) + a(i,j);
return sum;
matrix matrix::operator*(matrix& a){
matrix product(nrows, ncols);
for (int i=0; i<nrows; i++)
for(int j=0; j<ncols; j++)
product(i,j) = (i,j) * a(i,j);
return product;
matrix matrix::operator-(matrix& a){
matrix difference(nrows, ncols);
for (int i=0; i<nrows; i++)
for(int j=0; j<ncols; j++)
difference(i,j) = (i,j) - a(i,j);
return difference;
matrix matrix::operator/(matrix& a){
matrix divide(nrows, ncols);
for (int i=0; i<nrows; i++)
for(int j=0; j<ncols; j++)
divide(i,j) = (i,j) / a(i,j);
return divide;
}
int main(){
matrix a(2,2);
a(1,1)=5.0;
a(0,0)=6.0;
a(0,1)=7.0;
a(1,0)=8.0;
cout<<a(0,0)<<endl;
cout<<a(1,1)<<endl;
cout<<a<<endl;
matrix b(2,2);
b(0,0) = 5.0;
b(0,1) = 5.0;
b(1,0) = 5.0;
b(1,1) = 5.0;
cout<<b<<endl;
matrix c,d,e,f;
c=a+b;
d=a*b;
e=a-b;
f=a/b;
cout<<c<<endl;
cout <<"\n\n";
cout<<d<<endl;
cout<<e<<endl;
cout <<"\n\n";
cout<<f<<endl;
system("pause");
return 0;
}
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