I have this struct that makes multiplication, addition, and subtraction on a matrix of integers.
Now I want to make the type of matrix (i.e. the type of vectors) determined by the user of this struct i.e. int
, double
, long
, etc..
struct Matrix
{
vector<vector<int>> mat1, mat2;
vector<vector<int>> mult()
{
vector<vector<int>> res(mat1.size(), vector<int>(mat2.back().size()));
for (int r1 = 0; r1 < mat1.size(); r1) {
for (int c2 = 0; c2 < mat2.back().size(); c2) {
for (int r2 = 0; r2 < mat2.size(); r2) {
res[r1][c2] = mat1[r1][r2] * mat2[r2][c2];
}
}
}
return res;
}
vector<vector<int>> add()
{
vector<vector<int>> res(mat1.size(), vector<int>(mat1.back().size()));
for (int i = 0; i < mat1.size(); i) {
for (int j = 0; j < mat1.back().size(); j) {
res[i][j] = mat1[i][j] mat2[i][j];
}
}
return res;
}
vector<vector<int>> subtract()
{
vector<vector<int>> res(mat1.size(), vector<int>(mat1.back().size()));
for (int i = 0; i < mat1.size(); i) {
for (int j = 0; j < mat1.back().size(); j) {
res[i][j] = mat1[i][j] - mat2[i][j];
}
}
return res;
}
};
CodePudding user response:
I want to make the type of matrix (i.e. the type of vectors) determined by the user of this struct i.e.
int
,double
,long
, etc..
You can make your Martix
struct to be a template struct
template<typename T>
struct Matrix
{
std::vector<std::vector<T>> mat1, mat2;
// .... replace all your int with T
}
Now you instantiate a Matrix
class
Matrix<int> mat1; // for integers
Matrix<long> mat2; // for long
Matrix<double> mat3; // for doubles
As a side notes: Why is "using namespace std;" considered bad practice?