lab7_908

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#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; }
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