In this tutorial, We are going to learn about matrix representation by using vector STL (Standard Template Library) in C++ language.
There are many ways to create matrix. We will be using vector in given below example.
Method 1:
#include <iostream>
#include <vector>
#include <stdio.h>
using namespace std;
int main()
{
int row, column, matrix_val;
cout<<"Enter row size: ";
cin>>row;
cout<<"\nEnter column size: ";
cin>>column;
// Declare vector
vector<vector<int> > arr(row, vector<int>(column));
for (auto index_1 = 0; index_1 < row ; index_1++) {
for (auto index_2 = 0; index_2 < column; index_2++){
printf("\nEnter matrix value for position row: %d, column: %d: ", index_1, index_2);
cin>>matrix_val;
arr[index_1][index_2] = matrix_val;
}
}
// Print matrix
for (auto index_1 = 0; index_1 < row ; index_1++) {
for (auto index_2 = 0; index_2 < arr[index_1].size(); index_2++){
cout<<arr[index_1][index_2]<<" ";
}
cout<<"\n";
}
}Output:
Enter row size: 2
Enter column size: 2
Enter matrix value for position row: 0, column: 0: 1
Enter matrix value for position row: 0, column: 1: 2
Enter matrix value for position row: 1, column: 0: 3
Enter matrix value for position row: 1, column: 1: 4
Matrix is:
1 2
3 4
Method 2:
#include <iostream>
#include <vector>
#include <stdio.h>
using namespace std;
int main()
{
int row, column, matrix_val;
cout<<"Enter row size: ";
cin>>row;
cout<<"\nEnter column size: ";
cin>>column;
// Declare vector
vector<vector<int> > arr(row);
for (auto index_1 = 0; index_1 < row ; index_1++) {
arr[index_1] = vector<int>(column);
for (auto index_2 = 0; index_2 < column; index_2++){
printf("\nEnter matrix value for position row: %d, column: %d: ", index_1, index_2);
cin>>matrix_val;
arr[index_1][index_2] = matrix_val;
}
}
// Print matrix
for (auto index_1 = 0; index_1 < row ; index_1++) {
for (auto index_2 = 0; index_2 < arr[index_1].size(); index_2++){
cout<<arr[index_1][index_2]<<" ";
}
cout<<"\n";
}
}Output:
Enter row size: 2
Enter column size: 2
Enter matrix value for position row: 0, column: 0: 1
Enter matrix value for position row: 0, column: 1: 2
Enter matrix value for position row: 1, column: 0: 3
Enter matrix value for position row: 1, column: 1: 4
Matrix is:
1 2
3 4
Method 3:
#include <iostream>
#include <vector>
#include <stdio.h>
using namespace std;
int main()
{
int row, column;
cout<<"Enter row size: ";
cin>>row;
cout<<"\nEnter column size: ";
cin>>column;
// Declear vector
vector<vector<int> > arr(row);
for (auto index_1 = 0; index_1 < row ; index_1++) {
for (auto index_2 = 0; index_2 < column; index_2++){
printf("\nEnter matrix value for position row: %d, column: %d: ", index_1, index_2);
int matrix_val;
cin>>matrix_val;
arr[index_1].push_back(matrix_val);
}
}
// Print matrix
for (auto index_1 = 0; index_1 < row ; index_1++) {
for (auto index_2 = 0; index_2 < column; index_2++){
cout<<arr[index_1][index_2]<<" ";
}
cout<<"\n";
}
}
Output:
Enter row size: 2
Enter column size: 2
Enter matrix value for position row: 0, column: 0: 1
Enter matrix value for position row: 0, column: 1: 2
Enter matrix value for position row: 1, column: 0: 3
Enter matrix value for position row: 1, column: 1: 4
Matrix is:
1 2
3 4
To learn more about golang, Please refer given below link.
https://www.techieindoor.com/go-lang-tutorial/
References:
https://en.wikipedia.org/wiki/C%2B%2B