2d Arrays

//wap to multiplication of two matrix 

#include<bits/stdc++.h>
using namespace std;
int main(){
    int arr1[2][3] = {{2,3,4},{9,6,1}}; // you can take input from user as well
    int arr2[2][3] = {{1,4,3},{2,3,5}};
    int result[2][3];
    for(int i = 0 ; i < 2 ; i++){ // 2 -> row
        for(int j = 0 ; j < 3 ; j++){ // 3 -> col
            for(int k = 0 ; k < 2 ; k++){ // 
                result[i][j] = arr1[i][j] * arr2[i][j];
            }
        }
    }
    for(int i = 0 ; i < 2 ; i++){ // 2 -> row
        for(int j = 0 ; j < 3 ; j++){ // 3 -> col
            cout << result[i][j] << " ";
        }
        cout << endl;
    }
    return 0;
}

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//wap to find the transpose of a matrix 

#include<bits/stdc++.h>
using namespace std;
int main(){
    int arr1[2][3] = {{2,3,4},{9,6,1}}; // you can take input from user as well
    int arr2[3][2];
    for(int i = 0 ; i < 2 ; i++){ // 2 -> row
        for(int j = 0 ; j < 3 ; j++){ // 3 -> col
                arr2[j][i] = arr1[i][j];
        }
    }
    // col -> row , row -> col
    for(int i = 0 ; i < 3 ; i++){ // 2 -> row
        for(int j = 0 ; j < 2 ; j++){ // 3 -> col
            cout << arr2[i][j] << " ";
        }
        cout << endl;
    }
    return 0;
}

==============================================================================================================================================================

//wap to find the sum of right digonal of a matrix  

#include<bits/stdc++.h>
using namespace std;
int main(){
    int arr[3][3] = {{2,3,5},{8,7,6},{2,3,6}};
     int sum = 0;
    for(int i = 0 ; i < 3 ; i++){
        for(int j = i ; j < 3 ; j++){
            sum = sum + arr[i][j];
        }
    }
    cout << " sum of right diogonal element: "<< sum ;
    return 0;
    
}

================================================================================================================================================================

//wap to find the sum of left digonal of a matrix  

#include<bits/stdc++.h>
using namespace std;
int main(){
    int arr[3][3] = {{2,3,5},{8,7,6},{2,3,6}};
     int sum = 0;
    for(int i = 0 ; i < 3 ; i++){
        for(int j = 0 ; j < i ; j++){
            sum = sum + arr[i][j];
        }
    }
    cout << " sum of left diogonal element: "<< sum ;
    return 0;
    
}