心脏跳动

#include <stdio.h>
#include <windows.h>
#include <unistd.h>
int main() {
  float a;
  int i; 
  a=0.1;
  while(1){
    i++;
    if(i%2==0){
      a=0.09;
    }else{
      a=0.1;
    }
    sleep(1);
    system("cls");
    for (float y = 1.5f; y > -1.5f; y -= a ) {
        for (float x = -1.5f; x < 1.5f; x += 0.05f) {
            float a = x * x + y * y - 1;
            putchar(a * a * a - x * x * y * y * y <= 0.0f ? '*' : ' ');
        } putchar('\n');
    }
}
}