Diagonal Difference C++ Program

Diagonal difference C++ program.

In this article, you will learn how to make a diagonal difference C++ program.

Example

You should have knowledge of the following topics in c++ programming to understand these programs:

• C++ main() function
• C++ while loop
• C++ for loop

Source Code

// Diagonal Difference C++ Program
#include <iostream>
using namespace std;

int main() {
    int s = 0;
    cout << "Enter the size of the array::\n";
    cin >> s;
    
    int arr[s][s];
    cout << "\nEnter the elements of the array in [" << s << " x " << s << "] matrix form::\n";
    
    int i=0;
    while (i<s) {
        int j=0;
        while (j<s) {
            cin >> arr[i][j];
            j++;
        }
        i++;
    }
    
    // It will calculate the diagonal difference
    int df = 0, s2=s-1, d1=0, d2=0;
    i=0;
    while (i<s) {
        d1 += arr[i][i];
        d2 += arr[i][s2];
        s2--;
        i++;
    }
    df = d1 > d2 ? d1 - d2 : d2 - d1;

    // It will return the final output
    cout << "\nDiagonal Difference = " << df << "\n";
    return 0;
}

Run

Output

Explanation

In this given program we have taken the size of array 4 and the elements of the array in [4 x 4] matrix form following: 10 8 -12 2, 4 5 90 3, 11 2 4 6, 4 5 6 7.

Then we applied diagonal calculation in these forms:

Diagonal Difference C++ Program using For loop

// Diagonal Difference C++ Program using For loop
#include <iostream>
using namespace std;

int main() {
    int s = 0;
    cout << "Enter the size of the array::\n";
    cin >> s;
    
    int arr[s][s];
    cout << "\nEnter the elements of the array in [" << s << " x " << s << "] matrix form::\n";
    
    int i=0;
    for (; i<s; i++) {
        int j=0;
        for (; j<s; j++) {
            cin >> arr[i][j];
        }
    }
    
    // It will calculate the diagonal difference
    int df = 0, s2=s-1, d1=0, d2=0;
    i=0;
    for (; i<s; i++) {
        d1 += arr[i][i];
        d2 += arr[i][s2];
        s2--;
    }
    df = d1 > d2 ? d1 - d2 : d2 - d1;

    // It will return the final output
    cout << "\nDiagonal Difference = " << df << "\n";
    return 0;
}

Run