Intro to Programming, 01.14.2014

#include <iostream>

using namespace std;


const int size = 3;
int matrix1[3][3] = {
    { 1, 2, 3 },
    { 4, 5, 6 },
    { 7, 8, 9 }
};
int matrix2[3][3] = {
    { 1, 2, 3 },
    { 4, 5, 6 },
    { 7, 8, 9 }
};
void multiply(int* matrix1, int* matrix2)
{
    int result[size][size];
    for (int i = 0; i < size; ++i)
    {
        for (int j = 0; j < size; j++)
        {
            result[i][j] = 0;
            for (int k = 0; k < size; k++)
            {
                result[i][j] += matrix1[i * size + k] * matrix2[k * size + j];
            }

        }
    }
    for (int i = 0; i < size; i++)
    {
        for (int j = 0; j < size; j++)
        {
            cout << result[i][j] << " ";
        }
        cout << endl;
    }
}
double computeLength(double x1, double x2, double y1, double y2)
{
    return sqrt((x1 - x2)*(x1 - x2) + (y1 - y2)*(y1 - y2));
}

bool isTriangle(double a, double b, double c)
{
    if ((a + b) > c && a + c > b && b + c > a)
        return true;
    else return false;
}

int readarray(int* array)
{
    int size;
    cin >> size;
    for (int i = 0; i < size; ++i)
        cin >> array[i];
    return size;
}

void writearray(int* array, int size)
{
    for (int i = 0; i < size; i++)
        cout << array[i]<<" ";
}

void strcat(char* destination, char* source)
{
    int destinationLength = 0;
    while (destination[destinationLength] != '\0')
    {
        destinationLength++;
    }
    int sourceLength = 0;
    while (source[sourceLength] != '\0')
    {
        destination[destinationLength] = source[sourceLength];
        destinationLength++;
        sourceLength++;
    }
    destination[destinationLength] = '\0';
}
int main(int argc, char** argv)
{
    char text[1000000] = "tova e text";
    char* toAppend = "appendme";
    for (int i = 0; i < 100000; i++)
    {
        strcat(text, toAppend);
    }

    cout << text << endl;
    return 0;
}