#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
setlocale(LC_ALL, "rus");
const int MatrixSize = 3;
int ourMatrix[MatrixSize][MatrixSize] = {};
int rowSum[MatrixSize] = {}; // для записи суммы по строкам
int columnSum[MatrixSize] = {}; // ... по столбцам
cout << "Заполните матрицу " << MatrixSize << 'х' << MatrixSize << " числами построчно.\n";
for (int rowNum = 0; rowNum < MatrixSize; rowNum++)
{
for (int columnNum = 0; columnNum < MatrixSize; columnNum++)
{
cout << rowNum + 1 << "-я строка ";
cout << columnNum + 1 << "-й столбец: ";
cin >> ourMatrix[rowNum][columnNum];
}
cout << endl;
}
// вывод на экран + подсчет суммы
for (int rowNum = 0; rowNum < MatrixSize; rowNum++)
{
cout << " | ";
for (int columnNum = 0; columnNum < MatrixSize; columnNum++)
{
cout << setw(4) << ourMatrix[rowNum][columnNum] << " ";
rowSum[rowNum] += ourMatrix[rowNum][columnNum];
columnSum[rowNum] += ourMatrix[columnNum][rowNum];
}
cout << "|" << endl;
}
cout << "\nСумма по строкам!\n";
for (int i = 0; i < MatrixSize; i++)
{
cout << i + 1 << "-я строка: " << rowSum[i] << endl;
}
cout << "\nСумма по столбцам!\n";
for (int i = 0; i < MatrixSize; i++)
{
cout << i + 1 << "-й столбец: " << columnSum[i] << endl;
}
return 0;
}
#include
using namespace std;
int main()
{
const int ROW = 3;
const int COL = 3;
setlocale(LC_ALL, “RU”);
int arr[ROW][COL];
cout << "Заполните двумерный массив случайными числами" << endl;
for (int i = 0; i < ROW; i ) {
for (int j = 0; j > arr[i][j];
}
}
int sumROW = 0, sumCOL = 0;
cout << endl;
for (int i = 0; i < ROW; i ) {
for (int j = 0; j < COL; j ) {
cout << arr[i][j]<< "\t";
}
cout<<endl;
}
for (int i = 0; i < ROW; i ) {
for (int j = 0; j < COL; j ) {
sumROW = sumROW + arr[i][j];
}
cout << "Сумма элементов в строке : " << i + 1 << " " << sumROW;
sumROW = 0;
cout << endl;
}
for (int i = 0; i < ROW; i ) {
for (int j = 0; j < COL; j ) {
sumCOL = sumCOL + arr[j][i];
}
cout << "Сумма элементов в столбце : " << i + 1 << " " << sumCOL ;
sumCOL = 0;
cout << endl;
}
}
#include
#include
using namespace std;
int main()
{
srand(time(NULL));
const int ROW = 10;
const int COL = 10;
int sumROW = 0;
int sumROWMax = 0;
int numberROW = 1;
setlocale(LC_ALL, “RU”);
int arr[ROW][COL];
for (int i = 0; i < ROW; i ) {
for (int j = 0; j < COL; j ) {
arr[i][j] = rand() % 100 + 10;
}
}
for (int i = 0; i < ROW; i ) {
for (int j = 0; j < COL; j ) {
cout << arr[i][j] << "\t";
}
cout << endl;
}
for (int i = 0; i < ROW; i )
{
for (int j = 0; j < COL; j )
{
sumROW = sumROW + arr[i][j];
}
cout << "Сумма элементов в строке : " << i + 1 << " " << sumROW << endl;
sumROW = 0;
}
cout << endl;
for (int i = 0; i < ROW; i )
{
for (int j = 0; j sumROWMax)
{
sumROWMax = sumROW;
numberROW = i;
}
sumROW = 0;
}
cout << "Максимальная сумма элементов в строке "<< numberROW + 1 << ". line sum : " << sumROWMax << endl;
}
Can I still 3-4 tasks on this topic? To the author of RESPECT for such training material, the topics are very clearly and simply stated
#include
#define DEBUG
using namespace std;
int main()
{
setlocale(LC_ALL, “ru”);
int ROWS, COLS;
cout <> ROWS;
cout <> COLS;
int** a = new int*[ROWS];
for (int i = 0; i < ROWS; i )
a[i] = new int[COLS];
for (int i = 0; i < ROWS; i ) // input of matrix elements
for (int j = 0; j < COLS; j )
a[i][j] = rand() % 101 + 10;
cout<< endl;
#ifdef DEBUG
for (int i = 0; i < ROWS; i )
{
for (int j = 0; j < COLS; j )
cout << a[i][j] << " ";
cout << endl;
} //matrix output
#endif
int* sum_in_row = new int[ROWS]; // array initialization
for (int i = 0; i < ROWS; i )
sum_in_row[i] = 0;
for (int i = 0; i < ROWS; i ) // counting the sums of row elements
{
int sum = 0;
for (int j = 0; j < COLS; j )
sum_in_row[i] += a[i][j];
}
for (int i = 0; i < ROWS; i )
cout << "сумма строки " << i + 1 << "=" << sum_in_row[i] << endl; // output of row sums
int num_max_sum = 0;
int max_sum = 0;
int h=0;
for (int i = 0; i max_sum ? max_sum = sum_in_row[i], num_max_sum = i:h++;
cout << "номер строки с наибольшей суммой: " << num_max_sum+1;
for (int i = 0; i < ROWS; i ) // clearing memory
delete [] a[i];
delete [] a;
delete[] sum_in_row;
}
#include
using namespace std;
#include
#include “mainCu.h”
int main()
{
setlocale(LC_ALL, “rus”);
srand(time(NULL));
int row;
cin >> row;
int col;
cin >> col;
int** arr = new int* [row];
int* row_arr_sum = new int[row];
int* col_arr_sum = new int[col];
int row_sum = 0, col_sum = 0;
for (short i = 0; i < row; i )
row_arr_sum[i] = 0;
for (short i = 0; i < row; i )
col_arr_sum[i] = 0;
for (short i = 0; i < row; i ) {
arr[i] = new int[row];
for (short j = 0; j < col; j )
arr[i][j] = rand() % 10;
}
for (short i = 0; i < row; i ) {
for (short j = 0; j < col; j )
cout <<"|"<< arr[i][j] << "|";
cout << endl;
}cout << endl;
for (short i = 0; i < row; i ) {
for (short j = 0; j < col; j ) {
row_arr_sum[i] += arr[i][j];
col_arr_sum[i] += arr[i][j];
}
}
cout << "сумма по строкам: " << endl;
for (short i = 0; i < row; i ) {
row_sum += row_arr_sum[i];
cout << "строка(" << i+1 << "):"<< row_arr_sum[i]<<endl;
} cout << "сумма по столбцам: " << endl;
for (short i = 0; i < row; i ){
col_sum += row_arr_sum[i];
cout << "столбец(" << i + 1 << "):" << col_arr_sum[i] <<endl;}
cout << endl << col_sum << endl << row_sum << endl;
}
//sorry, I made a couple of mistakes.. fixed here
#include
using namespace std;
#include
#include “mainCu.h”
int main()
{
setlocale(LC_ALL, “rus”);
srand(time(NULL));
int row;
cin >> row;
int col;
cin >> col;
int** arr = new int* [row];
int* row_arr_sum = new int[row];
int* col_arr_sum = new int[col];
for (short i = 0; i < row; i )
row_arr_sum[i] = 0;
for (short i = 0; i < row; i )
col_arr_sum[i] = 0;
for (short i = 0; i < row; i ) {
arr[i] = new int[row];
for (short j = 0; j < col; j )
arr[i][j] = rand() % 10;
}
for (short i = 0; i < row; i ) {
for (short j = 0; j < col; j )
cout <<"|"<< arr[i][j] << "|";
cout << endl;
}cout << endl;
for (short i = 0; i < row; i ) {
for (short j = 0; j < col; j ){
row_arr_sum[i] += arr[i][j];
col_arr_sum[i] += arr[j][i];
}
}
cout << "сумма по строкам: " << endl;
for (short i = 0; i < row; i ) {
cout << "строка(" << i+1 << "):"<< row_arr_sum[i]<<endl;
} cout << "сумма по столбцам: " << endl;
for (short i = 0; i < row; i ){
cout << "столбец(" << i + 1 << "):" << col_arr_sum[i] <<endl;}
int max_count = 0;
int min_count =0;
int max_row_sum = row_arr_sum[0], min_row_sum = row_arr_sum[0];
for (short i= 0; i <row; i )
{
if (max_row_sum row_arr_sum[i]) {
min_row_sum = row_arr_sum[i];
min_count = i;
}
}
cout << "максимальная сумма в строке №" << max_count + 1 << " = " << max_row_sum << endl
<< "Минимальная сумма в строке №" << min_count + 1 << " = " << min_row_sum << endl;
}
#include
#include
using namespace std;
int main()
{
srand(time(NULL));
const int ROWS = 10;
const int COLS = 10;
int arr[ROWS][COLS]{};
for (int i = 0; i < ROWS; i )//Filling array arr[][]
{
for (int j = 0; j < COLS; j )
{
arr[i][j] = rand() % 90 + 10;
}
}
int arr_sum[ROWS]{};//We create an array in which we will store the sum // of the elements of each row of the array arr[][]
for (int i = 0; i < ROWS; i )
{
for (int j = 0; j < COLS; j )
{
arr_sum[i] = arr_sum[i] + arr[i][j];//Assign array element to i //arr_sum[] sum of all elements in i row of array arr[][] (and so on )
}
}
int max_index = 0;//variable that will store the index //of the maximum array element max_sum[]
for (int i = 1; i < ROWS; i )
{
if (arr_sum[max_index] < arr_sum[i])
{
max_index = i;
}
}
/*Since the size of the array arr_sum[] equal to the number of rows
* arr array[][] then the index of the maximum element of the array arr_sum[]
* matches the row index of the arr array[][] with the largest sum of elements
*/
cout << "Index max row – " << max_index;
return 0;
}
Why can you replace
columnSum[rowNum] += ourMatrix[columnNum][rowNum];
on
columnSum[columnNum] += ourMatrix[rowNum][columnNum];
and the result will be the same?
multiplication table
#include
int main()
{
int i=0, j=0;
short mas2d[10][10] = {};
//array filling
for (i = 0; i < 10; i ) {
for (j = 0; j < 10; j ) {
mas2d[i][j] = i * j;
}
}
//displaying an array
for (i = 0; i <10; i )
{
std::cout << std::endl ;
{
for (j = 0; j <10; j )
std::cout << mas2d[i][j] << "\t";
}
}
}