自已简单思路的2048，结果运行不下去，求大佬指点思路哪里错了
程序代码：#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<graphics.h>
#define W 87
#define S 83
#define A 65
#define D 68
#define ESC 27
int a[4][4]={0};/*存储得到的数*/
int i,j;/*行列的位置*/
void menu()/*开始界面*/
{
setbkcolor(EGERGB(0xff,0xff,0xff));
setcolor(EGERGB(0,0,0));
outtextxy(240,200,"制作人：萌萌");
outtextxy(220,280,"请按任意键开始游戏");
outtextxy(230,300,"上下左右是WSAD");
}
void gezi()/*设置格子*/
{
int i=0,j=0;
setcolor(EGERGB(0,0,0xff));
for(;i<=480;i+=160)/*设置格子*/
{
for(;j<=360;j+=120)
{
rectangle(i,j,i+160,j+120);
}
j=0;
}
}
void show()/*用于将颜色和数字展现出来*/
{
int color=0,t;
setfont(80,0,"宋体");
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
t=a[i][j];
if(t!=0)
{
for(;t=1;)
{
t=t/2;
color++;
setfillcolor(EGERGB(0,0x00+color,0xff-color));
outtextxy(i*160+80,j*120+60,"a[i][j]");
floodfill(i*160+1,j*120+1,EGERGB(0,0,0xff));
}
}
}
}
}
void change(int flags)/*根据按键改变对应数字*/
{
switch(flags)
{
case 1:/*按下W键*/
for(i=0;i<4;i++)
{
j=0;
while(a[i][j]==0)
{
while(j<3)
{
a[i][j]=a[i][j+1];
a[i][j+1]=0;
j++;
}
j=0;
}
for(j=0;j<3;)
{
int n;
if(a[i][j]==a[i][j+1])
{
a[i][j]+=a[i][j+1];
a[i][i+1]=0;
for(n=j+1;n<3;n++)
{
a[i][n]=a[i][n+1];
a[i][n+1]=0;
}
j=0;
}
else
j++;
}
}
case 2:/*按下S键*/
for(i=0;i<4;i++)
{
j=3;
while(a[i][j]==0)
{
while(j>0)
{
a[i][j]=a[i][j-1];
a[i][j-1]=0;
j--;
}
j=3;
}
for(j=3;j>0;)
{
int n;
if(a[i][j]==a[i][j-1])
{
a[i][j]+=a[i][j-1];
a[i][j-1]=0;
for(n=j-1;n>0;n--)
{
a[i][n]=a[i][n-1];
a[i][n-1]=0;
}
j=3;
}
else
j--;
}
}
case 3:/*按下A键*/
for(j=0;j<4;j++)
{
i=0;
while(a[i][j]==0)
{
while(i<3)
{
a[i][j]=a[i+1][j];
a[i+1][j]=0;
i++;
}
i=0;
}
for(i=0;i<3;)
{
int n;
if(a[i][j]==a[i+1][j])
{
a[i][j]+=a[i+1][j];
a[i+1][j]=0;
for(n=i+1;n<3;n++)
{
a[n][j]=a[n+1][j];
a[n+1][j]=0;
}
i=0;
}
else
i++;
}
}
case 4:/*按下D键*/
for(j=0;j<4;j++)
{
i=3;
while(a[i][j]==0)
{
while(i>0)
{
a[i][j]=a[i-1][j];
a[i-1][j]=0;
}
i=3;
}
for(i=3;i>0;)
{
int n;
if(a[i][j]==a[i-1][j])
{
a[i][j]+=a[i-1][j];
a[i-1][j]=0;
for(n=i-1;n>0;n--)
{
a[n][j]=a[n-1][j];
a[n-1][j]=0;
}
i=3;
}
else
i--;
}
}
}
}
int WinMain()
{
int c=0,b=0;
int ch;
initgraph(640,480);
setcaption("2048");
setfont(20,0,"宋体");
menu();
ch=getch();
cleardevice();
while(1)
{
gezi();
Sleep(100);
srand(time(NULL));/*得到重新出现的位置*/
c=rand()%4;
b=rand()%4;
while(1)
{
int m=0;
if(a[b][c]==0)
{
a[b][c]=2;
m++;
}
else
{
b=rand()%4;
c=rand()%4;
}
if(m==2)
break;
}
show();
Sleep(100);
for(i=0;i<4;i++)
for(j=0;j<4;j++)
{
int z=0;
if(a[i][j]==1024)
{
setcolor(RED);
cleardevice();
outtextxy(280,240,"YOU WIN!");
getch();
closegraph();
return 0;
}
if(a[i][j]!=0)
{
z++;
}
if(z==16)
{
outtextxy(280,240,"YOU LOSE!");
return 0;
}
}
ch=getch();
if(ch==27)
break;
else
{
switch(ch)
{
case 87:
change(1);
break;
case 83:
change(2);
break;
case 65:
change(3);
break;
case 68:
change(4);
break;
}
}
Sleep(100);
cleardevice();
}
cleardevice();
setcolor(EGERGB(0xff,0,0));
outtextxy(240,220,"是否退出？");
getch();
closegraph();
return 0;
}
感谢指点，我估计脑子做的有点迷糊了！