c语言实现跳动的心

本文章分为两部分：第一部分为实现多彩的心，第二部分是实现心得跳动，两个代码均独立运行
本篇文章转载自公众号： C语言程序设计基础知识

（一）C语言实现多彩的心

实现过程其实很简单

首先使用for循环绘制心形

for (y = 1.5f; y > -1.5f; y -= 0.1f)
  {
    for (x = -1.5f; x < 1.5f; x += 0.05f)
    {
      z = x * x + y * y - 1;
      f = z * z * z - x * x * y * y * y;
      putchar(f <= 0.0f ? "*********"[(int)(f * -8.0f)] : ' ');
    }
    putchar('\n');
  }

然后使用for循环进行切换cmd窗口颜色就可以做到

for (time = 0; time < 99999999; time++);
  system("color b");

完整代码如下：

#include 
#include 
#include 
#define I 20
#define R 340
#include 
int main()
{
  char answer[10];

  printf("   自从遇见了你，就不停地想你\n");
  printf("   编一个死循环\n   让我们一直走，一直走。");
  printf("   如果你也愿意\n   输入yes,你可以看到我的真心\n");
  scanf("%s", answer);
  if (!(answer[0] == 'y' && answer[1] == 'e' && answer[2] == 's'))
  {
    printf("555 \n");
    return 0;
  }

  //首先使用for循环打印出心形
  float y, x, z, f;
  for (y = 1.5f; y > -1.5f; y -= 0.1f)
  {
    for (x = -1.5f; x < 1.5f; x += 0.05f)
    {
      z = x * x + y * y - 1;
      f = z * z * z - x * x * y * y * y;
      putchar(f <= 0.0f ? "*********"[(int)(f * -8.0f)] : ' ');
    }
    putchar('\n');
  }
  
  //循环变色
  long time;
  for (;;)
  {
    system("color a");
    for (time = 0; time < 99999999; time++);
    system("color b");
    for (time = 0; time < 99999999; time++);
    system("color c");
    for (time = 0; time < 99999999; time++);
    system("color d");
    for (time = 0; time < 99999999; time++);
    system("color e");
    for (time = 0; time < 99999999; time++);
    system("color f");
    for (time = 0; time < 99999999; time++);
    system("color 0");
    for (time = 0; time < 99999999; time++);
    system("color 1");
    for (time = 0; time < 99999999; time++);
    system("color 2");
    for (time = 0; time < 99999999; time++);
    system("color 3");
    for (time = 0; time < 99999999; time++);
    system("color 4");
    for (time = 0; time < 99999999; time++);
    system("color 5");
    for (time = 0; time < 99999999; time++);
    system("color 6");
    for (time = 0; time < 99999999; time++);
    system("color 7");
    for (time = 0; time < 99999999; time++);
    system("color 8");
    for (time = 0; time < 99999999; time++);
    system("color 9");
  }
  getchar();
  return 0;
}

效果如下：

（二）如何让心跳动起来

一颗不会动的心怎么能显得足够真（zhuang）诚（B）呢？

让我们使用数学函数巧妙地让这颗心动起来。

完整代码如下：

#include 
#include 
#include 
#include 
#include 
#include 

float f(float x, float y, float z) {
  float a = x * x + 9.0f / 4.0f * y * y + z * z - 1;
  return a * a* a - x * x * z * z * z - 9.0f / 80.0f * y * y * z * z * z;
}

float h(float x, float z) {
  for (float y = 1.0f; y >= 0.0f; y -= 0.001f)
    if (f(x, y, z) <= 0.0f)
      return y;
  return 0.0f;
}

int main() {
  HANDLE o = GetStdHandle(STD_OUTPUT_HANDLE);
  _TCHAR buffer[25][80] = { _T(' ') };
  _TCHAR ramp[] = _T(".:-=++#%@");   //心  每层使用的字符

  int is = 0;
  
  for (float t = 0.0f;; t += 0.1f) 
  {
    //两种颜色循环切换
    is++;
    if(is%2==0)system("color d");
    else  system("color c");
   
    int sy = 0;
    float s = sinf(t);
    float a = s * s * s * s * 0.2f;

    //生成当前心的形态
    for (float z = 1.3f; z > -1.2f; z -= 0.1f) 
    {
      _TCHAR* p = &buffer[sy++][0];
      float tz = z * (1.2f - a);
      for (float x = -1.5f; x < 1.5f; x += 0.05f) {
        float tx = x * (1.2f + a);
        float v = f(tx, 0.0f, tz);
        //如果是在心的范围中间  就计算对应的层
        if (v <= 0.0f) {
          float y0 = h(tx, tz);
          float ny = 0.01f;
          float nx = h(tx + ny, tz) - y0;
          float nz = h(tx, tz + ny) - y0;
          float nd = 1.0f / sqrtf(nx * nx + ny * ny + nz * nz);
          float d = (nx + ny - nz) * nd * 0.5f + 0.5f;
          *p++ = ramp[(int)(d * 5.0f)];  
        }
        //如果不在直接添加空格
        else
          *p++ = ' ';
      }
    }

      
    //将当前的心形打印出来   按行打印
    for (sy = 0; sy < 25; sy++) {
      COORD coord = { 0, sy };
      SetConsoleCursorPosition(o, coord);
      WriteConsole(o, buffer[sy], 79, NULL, 0);
      //if(sy ==12 )printf("520");
    }
    Sleep(33);
  }
}

效果如下：