systematic_love.cpp

#include <iostream>
#include <math.h>

const int HEART_SIZE = 20;
const int HALF_SIZE = HEART_SIZE / 2;

bool is_in_love(int x,int y);
int main(void)
{
    std::string message = " SYSTEMATIC LOVE ";
    int message_indent = (HALF_SIZE - (message.length() / 4)) - 1;

    for (int y = 0; y < HEART_SIZE; y++)
    {
        for(int x = 0; x < HEART_SIZE; x++)
        {
            std::cout << ((is_in_love(x,y)) ? "vv" : "  ");

            if (y == HALF_SIZE - 1)
            {
                if (x == message_indent)
                {
                    std::cout << message.c_str();
                    x += (message.length() / 2);
                }
            }
        }
        std::cout << "\n";
    }
    return 0;
}
bool is_in_love(int x,int y){
    const float width = 2.2f;
    const float height = 3.0f;
    const float HEART_COEFFICIENT = 0.7f;

    float check_x = ((static_cast<float>(x) / static_cast<float>(HEART_SIZE)) - 0.5f) * width;
    float check_y = ((static_cast<float>(HEART_SIZE - y) / static_cast<float>(HEART_SIZE)) - 0.4f) * height;

    float top_y = 0.0f;
    float bottom_y = 0.0f;

    if(check_x >= 0)
    {
        top_y = sqrt(1 - (check_x * check_x)) + HEART_COEFFICIENT   * sqrt(check_x);
        bottom_y = -sqrt(1 - (check_x * check_x)) + HEART_COEFFICIENT * sqrt(check_x);
    }
    else
    {
        top_y = sqrt(1 - (check_x * check_x)) + HEART_COEFFICIENT * sqrt(-check_x);
        bottom_y = -sqrt(1 - (check_x * check_x)) + HEART_COEFFICIENT * sqrt(-check_x);
    }

    if((bottom_y <= check_y) && (check_y <= top_y))
    {
        return true;
    }
    else
    {
        return false;
    }
}