c语言实现动态心型代码

//c语言动态心型的实现代码，帮助熟悉指针和程序：

#include <stdio.h>
#include <stdlib.h>
void show( int m)
{
   // char a[3][5];

char *a=(char *)malloc((4*m/2+m)*(4*m+m));
    int i,j,k;
         
for(k=0;k<(4*m/2+m);k++)

for(i=0;i<(4*m+m);i++)

 *(a+k*(4*m+m)+i)=' ';




  for(i=0;i<=(4*m/2);i++)
  * (a+i+((4*m/2)-i)*(4*m+m))='*';

  for(j=(4*m/2);j<=4*m;j++)
   *(a+j+(j-(4*m/2))*(4*m+m))='*';



 for(k=0;k<(4*m/2+1);k++)
 {
   for(i=0;i<(4*m+m);i++)
   {
     printf("%c",*(a+(k*(4*m+m))+i));
    }
     printf("\n");
  }


}

int main()
{
   int num;
int b;
   printf("please input one number:");
   scanf("%d",&num);
   show(num);
while(num)
{
   for(b=0;b<6;b++)
   {
   sleep(1);
   show(b);
   }
 for(b=6;b>=0;b--)
   {
   sleep(1);
   show(b);
   }
   exit(1);
}
return 0;
}