Programming Example
C++ Program: 3×3 Matrix and Sum of Elements
Study this program carefully to understand the logic, output, and explanation in a structured way.
#include <iostream>
using namespace std;
int main() {
int matrix[3][3];
int sum = 0;
cout << "Enter elements of 3x3 matrix:\n";
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
cin >> matrix[i][j];
sum += matrix[i][j];
}
}
cout << "Sum of all elements = " << sum << endl;
return 0;
}
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.