lab7_908

#include <iostream>
using namespace std;

int main() {
    
    const int n = 4 ; 
    int a[n][n];
    for (size_t i = 0 ; i < n ; i++){
        for (size_t j = 0 ; j < n ; j++){
            a[i][j] = rand() % 10 ; 
            cout << a[i][j] << "  ";
        }
        cout << endl ; 
    }
    int  sum = 0  ; 
    
    for (size_t i = 0 ; i < n ; i++){
        for (size_t j = 0 ; j < n ; j++){
            if ( i == j ){
                sum += a[i][j];
            } 
        }
    }
    cout << "1 - " << sum << endl  ; 
    sum = 0 ; 
    
    for (size_t i = 0 ; i < n ; i++){
        for (size_t j = 0 ; j < n ; j++){
            if ( i == j-1 ){
                sum += a[i][j];
            } 
        }
    }
    cout << "2 - " << sum << endl  ;  
    sum = 0 ; 
    
    for (size_t i = 0 ; i < n ; i++){
        for (size_t j = 0 ; j < n ; j++){
            if ( i == j-2 ){
                sum += a[i][j];
            } 
        }
    }
    cout << "3 - " << sum << endl  ;  
    sum = 0 ; 
    
    for (size_t i = 0 ; i < n ; i++){
        for (size_t j = 0 ; j < n ; j++){
            if ( i == j-3 ){
                sum += a[i][j];
            } 
        }
    }
    cout << "4 - " << sum << endl  ;  
    sum = 0 ; 
    
    
    
    return 0;
}