задача 2

#include <iostream>

void calculateSums(int matrix[3][4], int rowCount, int colCount, int rowSums[], int colSums[], int& totalSum) 
{
    totalSum = 0;
    for (int i = 0; i < rowCount; ++i) 
    {
        for (int j = 0; j < colCount; ++j) 
        {
            rowSums[i] += matrix[i][j];
            colSums[j] += matrix[i][j];
            totalSum += matrix[i][j];
        }
    }
}

void printRowSums(int matrix[3][4], int rowCount, int colCount, int rowSums[]) 
{
    for (int i = 0; i < rowCount; ++i) 
    {
        for (int j = 0; j < colCount; ++j) 
        {
            std::cout << matrix[i][j] << " ";
        }
        std::cout << "| " << rowSums[i] << std::endl;
    }
}

void printSeparatorLine(int colCount) 
{
    for (int j = 0; j < colCount; ++j) 
    {
        std::cout << "---";
    }
    std::cout << "---" << std::endl;
}

void printColumnSums(int colCount, int colSums[], int totalSum) 
{
    for (int j = 0; j < colCount; ++j) 
    {
        std::cout << colSums[j] << " ";
    }
    std::cout << "| " << totalSum << std::endl;
}

int main() 
{
    int matrix[3][4] = 
    {
        {3, 5, 6, 7},
        {12, 1, 1, 1},
        {0, 7, 12, 1}
    };

    int rowCount = 3;
    int colCount = 4;

    int rowSums[3] = { 0 };
    int colSums[4] = { 0 };
    int totalSum = 0;

    calculateSums(matrix, rowCount, colCount, rowSums, colSums, totalSum);
    printRowSums(matrix, rowCount, colCount, rowSums);
    printSeparatorLine(colCount);
    printColumnSums(colCount, colSums, totalSum);

    return 0;
}