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BrainFuck解释器

2011年2月01日 08:57 | Comments(19) | Category:C语言 | Tags:c BrainFuck 解释器

无注释版本：

#include <stdio.h>
#include <stdlib.h>

#define SIZE 5000

char data[SIZE], code[SIZE]; 
int  ptr, flag;

void interpreter(char *ip)
{
	char* re;
	
	while (*ip)
	{
		switch(*ip++)
		{
			case '<': --ptr;  break;
			case '>': ++ptr;  break;
			case '+': ++data[ptr]; break;
			case '-': --data[ptr]; break;
			case '.': putchar(data[ptr]);    fflush(stdout); break;
			case ',': data[ptr] = getchar(); fflush(stdout); break;
			case '[': for (flag=1,re=ip; flag && *ip; ++ip)
							flag += *ip=='[', flag -= *ip==']';
				  	  if(!flag)
				  	  {
				  	  		ip[-1] = 0;
				  	  		while (data[ptr])
				  	  			interpreter(re);
			  	  			ip[-1] = ']';
			  	  			break;
				  	  }
			case ']': puts("Unbalancded brackets!"), exit(-3);
			default : ;//SKIP
		}
		if (ptr < 0 || ptr > 100)
			puts("Out of Range"), exit(-4);
	}
}
 
int main(int argc, char *argv[])
{
	FILE *fin;
	int codelength;
	
	if (argc != 2)
		return puts("BrainFuck Interpreter v 0.1\nStar\nUsage:BFI filename"), 0;
	if ((fin = fopen(argv[1], "r")) == NULL)
		return puts("Cannot open file!"), -1;
	fseek(fin, 0, SEEK_END);
	if ((codelength = ftell(fin)) > SIZE)
		return puts("The program is too large."), -2;
	fseek(fin, 0, SEEK_SET);
	fread(code, codelength, 1, fin);
	code[codelength] = '\0';
	interpreter(code);
	return 0;
}

 

Windows屏幕飘雪

2011年1月23日 07:46 | Comments(10) | Category:Windows | Tags:Windows API SDK c 

#include <windows.h>
#include <stdlib.h>

#define UNICODE			//使用UNICODE字符 
#define _UNICODE

#define ID_TIME 1
#define NUMOFSNOW 214	//雪花数量 

typedef struct tagSNOW
{
	POINT pos;			//雪花坐标 
	int   r;			//雪花半径 
	int   xSpeed;		//x,y速度 
	int   ySpeed;
}SNOW, *PSNOW;

INT screen_x, screen_y;		//屏幕坐标 

#pragma comment(linker, "/subsystem: windows")

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, 
LPSTR lpCmdLine, int iCmdShow)
{
	TCHAR	 szAppName[] = TEXT ("屏幕飘雪");	//应用程序名 
	TCHAR    szTitle[]   = TEXT ("桌面窗口");	//窗口名 
	HWND	 hWnd;								//窗口句柄 
	MSG		 msg;								//消息循环 
	WNDCLASS wc;								//窗口类 
	
	INT x, y;
	
	wc.cbClsExtra	 = 0;	//不用额外窗口类和窗口空间 
	wc.cbWndExtra	 = 0;
	wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);   //黑色背景 
	wc.hCursor		 = LoadCursor (hInstance, IDC_ARROW);		//默认箭头 
	wc.hIcon		 = LoadIcon   (hInstance, IDI_APPLICATION); //默认图标
	wc.hInstance	 = hInstance;								//程序句柄 
	wc.lpfnWndProc	 = WndProc;									//窗口过程 
	wc.lpszClassName = szAppName;								//程序名称 
	wc.lpszMenuName  = NULL;									//菜单置空 
	wc.style		 = CS_HREDRAW | CS_VREDRAW; 				//水平|垂直对齐
	
	if (!RegisterClass (&wc))
	{
		MessageBox (NULL, TEXT("窗口注册失败！"), TEXT("ERROR"), 
		MB_OK | MB_ICONINFORMATION);
		return -1;
	}
	
	screen_x = GetSystemMetrics (SM_CXSCREEN);
	screen_y = GetSystemMetrics (SM_CYSCREEN);
	
	hWnd = CreateWindow (szAppName, szTitle, WS_OVERLAPPEDWINDOW | WS_VISIBLE, 
						0, 0, screen_x, screen_y, NULL, NULL, hInstance, NULL);
	
	if (!hWnd)
	{
		MessageBox (NULL, TEXT("创建窗口失败！"), TEXT("ERROR"), MB_OK | 
		MB_ICONINFORMATION);
		return -2; 
	}
	
	SetWindowPos (hWnd, HWND_TOPMOST, 0, 0, screen_x, screen_y, SWP_NOMOVE);
	
	while (GetMessage (&msg, NULL, 0, 0) > 0)
	{
		TranslateMessage (&msg);
		DispatchMessage  (&msg);
	}
	
	return msg.wParam;
}

LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static HDC		hScrDC, hSaveDC, hMemDC;
	static HBITMAP  hSaveBmp, hBmp;
	static SNOW		snows[NUMOFSNOW];
	static RECT 	rtScr;
	
	INT	i;
	
	switch (message)
	{
		case WM_CREATE:		//创造窗口时 
		{
			hScrDC   = CreateDC ("DISPLAY", NULL, NULL, NULL);
			//召唤2个DC，并以此为祭品，召唤2个BMP 
			hSaveDC  = CreateCompatibleDC(hScrDC);
			hMemDC   = CreateCompatibleDC(hScrDC);
			hSaveBmp = CreateCompatibleBitmap(hScrDC, screen_x, screen_y);
			hBmp     = CreateCompatibleBitmap(hScrDC, screen_x, screen_y);
			SelectObject (hSaveDC, hSaveBmp);
			SelectObject (hMemDC , hBmp);
			//将屏幕拷贝到SAVE 
			BitBlt (hSaveDC, 0, 0, screen_x, screen_y, hScrDC, 0, 0, SRCCOPY);
			
			SetRect (&rtScr, 0, 0, screen_x, screen_y);
			srand ((unsigned)GetTickCount());
			//随机变量数据 
			for (i = 0; i < NUMOFSNOW; ++i)
			{
				snows[i].pos.x  = rand() % screen_x;
				snows[i].pos.y  = rand() % (screen_y / 3);	//屏幕1/3以上召唤雪 
				snows[i].r 	    = rand() % 4 + 1;			//1~4 
				snows[i].xSpeed = rand() % 2 - 1;			//0~1
				snows[i].ySpeed = rand() % 4 + 2;			//2~4
			}
			ShowCursor (FALSE);
			SetTimer (hWnd, ID_TIME, 12, NULL);
		}
		break;
		case WM_TIMER:
		{
			for(i = 0; i < NUMOFSNOW; ++i)
			{
				snows[i].pos.x += snows[i].xSpeed;		//移动 
				snows[i].pos.y += snows[i].ySpeed;
				if (!PtInRect (&rtScr, snows[i].pos))	//如果跑出屏幕外
				{
					snows[i].pos.x = rand() % screen_x;
					snows[i].pos.y = rand() % (screen_y / 3);
				}
			}
			//将存好的放入内存中 
			BitBlt (hMemDC, 0, 0, screen_x, screen_y, hSaveDC, 0, 0, SRCCOPY);	
			//创建雪 
			for(i = 0; i < NUMOFSNOW; ++i)
			{
				SelectObject (hMemDC, GetStockObject (NULL_PEN));
				Ellipse (hMemDC, snows[i].pos.x, snows[i].pos.y, 
				snows[i].pos.x + 2*snows[i].r, snows[i].pos.y + 2*snows[i].r);
			}
			//将雪放在屏幕上 
			BitBlt (hScrDC, 0, 0, screen_x, screen_y, hMemDC, 0, 0, SRCCOPY);	
		}
		break;
		case WM_LBUTTONDOWN:
			SendMessage (hWnd, WM_CLOSE, 0, 0);
			break;
		case WM_DESTROY:
		{
			//清理所有垃圾 
			ShowCursor   	(TRUE);
			KillTimer    	(hWnd, ID_TIME);
			DeleteObject 	(hBmp);
			DeleteObject 	(hSaveBmp);
			DeleteDC 	 	(hSaveDC);
			DeleteDC	 	(hScrDC);
			InvalidateRect  (NULL, NULL, TRUE);
			PostQuitMessage (0);
		}
		break;
		default:
			return DefWindowProc (hWnd, message, wParam, lParam);
	}
	return 0;
}

表的3个例子

2010年10月03日 21:00 | Comments(5) | Category:C语言 | Tags:c 双向链表 链表 线性表 数据结构

1.线性表的例子

#include "List.h"

int data[5] = {2, 3, 6, 7, 11};

int main(void)
{
	//线性表的简单示例 
	int i, j, k;
	SQLIST L;
	k = InitSqlist(&L, 10);	//初始化线性表 
	if(k == 0)
	{
		puts("ERROR");
		exit(-1);
	}
	for(i = 0; i < 5; ++i) 
		AppendSqlistElem(&L, data[i]);	//把data数据放入线性表 
	TraverseSqlist(L);					//遍历线性表 
	
	putchar(10);
	
	j = SearchSqlist(L, 6);				//查找数据6 
	DeleteSqlistElemAt(&L, j);			//删除 
	InsertSqlistElemAt(&L, 5, j);		//插入5
	
	TraverseSqlist(L);					
		
	DestroySqlist(&L);					//销毁线性表 
			
	return 0;
}

2.单链表的例子

#include "List.h"

int data[5] = {2, 3, 6, 7, 11};

int main(void)
{
	//链表示例	
	int i, j, k;
	LINKLIST L = NULL;
	NODEPTR S, SPRE;

	k = InitLinklist(&L);	//初始化链表 
	if(k == 0)
	{
		puts("ERROR");
		exit(-1);
	}
	for(i = 0; i < 5; ++i) 
		AddLinklistElem(L, data[4-i]);	//添加数据 
	TraverseLinklist(L);				//遍历
	
	putchar(10);
	
	DeleteLinklistElem(L, 6);			//删除元素6 
	InsertLinklistElemAt(L, 5, 3);		//插入元素5 
	TraverseLinklist(L);				
			
	DestroyLinklist(&L);				//释放表 
	
	return 0;
}

3.双向链表的例子

#include "List.h"

int data[5] = {2, 3, 6, 7, 11};

int main(void)
{
	//双向链表的简单示例 
	int i, j, k;
	DBLINKLIST L;
	DBNODEPTR t;
	k = InitDBLinklist(&L);	//初始化双向链表
	if(k == 0)
	{
		puts("ERROR");
		exit(-1);
	}
	
	for(i = 0, t = L; i < 5; ++i,t = t->next) 
		InsertDBLinklistElemAfter(t, data[i]);	//把data数据放入双向链表

	TraverseDBLinklist(L);					//遍历双向链表

	putchar(10);
	
	t = SearchDBLinklist(L, 6);			//找到6 
	DeleteDBLinklistElem(t);			//删除6 
	t = SearchDBLinklist(L, 3);			//找到3 
	InsertDBLinklistElemAfter(t, 5);	//插入5 
	TraverseDBLinklist(L);				
	
	DestroyDBLinklist(&L);					//销毁双向链表			
	return 0;
}

表的头文件

2010年10月03日 20:54 | Comments(1) | Category:C语言 | Tags:c 数据结构 线性表 链表 双向链表 

/* 数据结构 表的实现 List.h
 * author : star
 */

//防止重复定义
#ifndef LIST_H
#define LIST_H

#include "defs.h"

//初始化容量为n的线性表  
//时间复杂度O(1) 
int InitSqlist(SQLIST *L, int n)
{
	L->data = (ElemType *)malloc(n * sizeof(ElemType));
	if(L->data == NULL)
		return 0;
	L->size = n;
	L->len  = 0;
	return 1;
}

//销毁线性表
//时间复杂度O(1) 
void DestroySqlist(SQLIST *L)
{
	free(L->data);
	L->data = NULL;
	L->size = 0;
	L->len  = 0;
}

//判断线性表的空与满
//时间复杂度O(1)
int IsSqlistFull(SQLIST L)
{
	return L.len == L.size;
}
int IsSqlistEmpty(SQLIST L)
{
	return L.len == 0;
}

//获取第i个数据
//时间复杂度O(1)
//if(i >= 0 || i <= L->len) return L->data[i-1];

//追加数据
//时间复杂度O(1)
int AppendSqlistElem(SQLIST *L, ElemType e)
{
	if(IsSqlistFull(*L))
		return 0; 
	L->data[L->len] = e;
	++L->len;
	return 1;
}

//在i(i>=0)处插入数据
//时间复杂度O(n)
int InsertSqlistElemAt(SQLIST *L, ElemType e, int i)
{
	int k;
	if(i > L->len || IsSqlistFull(*L))
		return 0;
	for(k = L->len - 1; k >= i; --k)
		L->data[k+1] = L->data[k];
	L->data[i] = e;
	++L->len;
	return 1;
}

//删除表中i(i>=0)处的数据
//时间复杂度O(n)
int DeleteSqlistElemAt(SQLIST *L, int i)
{
	int k;
	if(i >= L->len || IsSqlistEmpty(*L))
		return 0;
	for(k = i+1; k < L->len; ++k)
		L->data[k-1] = L->data[k];
	--L->len;
	return 1;
}

//遍历线性表
//时间复杂度O(n)
void TraverseSqlist(SQLIST L)
{
	int i;
	for(i = 0; i < L.len; ++i)
		printf(FORMATSTR, L.data[i]);
}

//查找数据 
//时间复杂度O(n)
int SearchSqlist(SQLIST L, ElemType key)
{
	int i;
	for(i = 0; i < L.len; ++i)
		if(L.data[i] == key)
			return i;
	return -1;
}

//初始化链表  
//时间复杂度O(1)
int InitLinklist(LINKLIST *L)
{
	*L = (LINKLIST)malloc(sizeof(NODE));
	if(*L == NULL)
		return 0;
	(*L)->next = NULL;
	return 1;
}

//销毁链表
//时间复杂度O(n) 
void DestroyLinklist(LINKLIST *L)
{
	NODEPTR p, q;
	p = *L;
	while(p)
	{
		q = p;
		p = p->next;
		free(q);
	}
	*L = NULL;
}

//获取第i(i>=1)个元素 
//时间复杂度O(n)
NODEPTR GetLinklistElem(LINKLIST L, int i, NODEPTR *pre)
{
	NODEPTR p;
	int 	k;
	p = L; k = 0;
	while(k < i && p != NULL)
	{
		*pre = p;
		p = p->next;
		++k;
	}
	if(k < i) 
		*pre = NULL;
	return p;
}

//添加数据
//时间复杂度O(1)
int AddLinklistElem(LINKLIST L, ElemType e)
{
	NODEPTR p;
	p = (NODEPTR)malloc(sizeof(NODE));
	if(p == NULL)
		return 0;
	p->data = e;
	p->next = L->next;
	L->next = p;
	return 1;
}

//在i(i>=1)处插入数据
//时间复杂度O(n)
int InsertLinklistElemAt(LINKLIST L, ElemType e, int i)
{
	NODEPTR p, q, pre;
	q = (NODEPTR)malloc(sizeof(NODE));
	if(q == NULL)
		return 0;	
	q->data = e;
	p = GetLinklistElem(L, i, &pre);
	if(pre == NULL)
		return 0;
	q->next   = p;
	pre->next = q;
	return 1;
}

//删除表中i(i>=1)处的数据
//时间复杂度O(n)
int DeleteLinklistElemAt(LINKLIST L, int i)
{
	NODEPTR p, pre;
	p = GetLinklistElem(L, i, &pre);
	if(p == NULL)
		return 0;
	pre->next = p->next;
	free(p);
	return 1;
}

//遍历线性表
//时间复杂度O(n)
void TraverseLinklist(LINKLIST L)
{
	NODEPTR p;
	p = L->next;
	while(p)
	{
		printf(FORMATSTR, p->data);
		p = p->next;
	}
}

//查找数据 
//时间复杂度O(n)
NODEPTR SearchLinklist(LINKLIST L, ElemType e, NODEPTR *pre)
{
	NODEPTR p;
	*pre = L;
	p = L->next;
	while(p != NULL && p->data != e)
	{
		*pre = p;
		p = p->next;
	}
	if(p == NULL)
		*pre = NULL;
	return p;
}

//删除表中的数据
//时间复杂度O(n)
int DeleteLinklistElem(LINKLIST L, ElemType e)
{
	NODEPTR p, pre;
	p = SearchLinklist(L, e, &pre);
	if(p == NULL)
		return 0;
	pre->next = p->next;
	free(p);
	return 1;
}

//初始化链表  
//时间复杂度O(1)
int InitDBLinklist(DBLINKLIST *L)
{
	*L = (DBLINKLIST)malloc(sizeof(DBNODE));
	if(*L == NULL)
		return 0;
	(*L)->next = (*L)->prior = NULL;
	return 1;
}

//销毁双向链表
//时间复杂度O(n) 
void DestroyDBLinklist(DBLINKLIST *L)
{
	DBNODEPTR p, q;
	p = *L;
	while(p)
	{
		q = p;
		p = p->next;
		free(q);
	}
	*L = NULL;
}

//在双向链表结点后插入元素
//时间复杂度O(1) 
int InsertDBLinklistElemAfter(DBNODEPTR p, ElemType e)
{
	DBNODEPTR q;
	q = (DBNODEPTR)malloc(sizeof(DBNODE));
	if(q == NULL)
		return 0;
	q->data  = e;
	q->next  = p->next;
	q->prior = p;
	if(p->next != NULL)
		p->next->prior = q;
	p->next = q;
	return 1;
}

//遍历双向链表
//时间复杂度O(n)
void TraverseDBLinklist(DBLINKLIST L)
{
	DBNODEPTR p;
	p = L->next;
	while(p)
	{
		printf(FORMATSTR, p->data);
		p = p->next;
	}
}
//删除双向链表中的某个结点
//时间复杂度O(1) 
void DeleteDBLinklistElem(DBNODEPTR p)
{
	DBNODEPTR pre;
	pre = p->prior;
	if(pre != NULL)
		pre->next = p->next;
	if(p->next != NULL)
		p->next->prior = pre;
	free(p);
}

//查找双向链表的数据 
//时间复杂度O(n)
DBNODEPTR SearchDBLinklist(DBLINKLIST L, ElemType e)
{
	DBNODEPTR p;
	p = L->next;
	while(p != NULL && p->data != e)
		p = p->next;
	return p;
}

#endif

数据结构头文件Ver1.0

2010年10月03日 20:43 | Comments(27) | Category:C语言 | Tags:c 数据结构 线性表 链表 静态表 广义表 

/* 数据结构 全部结构定义文件 defs.h
 * author : star
 */

//引入所有需要的头文件 
#include <stdio.h>
#include <stdlib.h>

//防止重复定义
#ifndef DEF_H
#define DEF_H

//定义执行状态返回结果
 
#define TRUE 		 1  //成功 
#define FALSE 		 0  //失败 


#ifndef FORMATSTR
#define FORMATSTR "%d " //输出格式 

typedef int ElemType;	//基本数据类型 
#endif

//线性表 
typedef struct
{
	ElemType *data;		//数据 
	int		 size;	    //容量 
	int 	 len;	    //长度 
}SQLIST;

//单链表
typedef struct link_node
{
	ElemType          data;		//数据
	struct link_node *next;		//结点 
}NODE, *NODEPTR, *LINKLIST;

//双向链表 
typedef struct dlink_node
{
	ElemType 		   data;			//数据 
	struct dlink_node *next, *prior;	//前后结点 
}DBNODE, *DBNODEPTR, *DBLINKLIST;

//循环单向链表 原理同单链表 
//循环双向链表 原理同双向链表

//静态链表
#define SLEN 512	//静态链表长度 
typedef struct slink_node
{
	ElemType data;	//数据 
	int      next;	//指针 
}SNODE, *SLINKLIST;

/*静态链表是给没有指针的语言写的，C语言有指针，*
 *而且静态链表不实用，定义多而杂，因此不写了   */
 
//广义表
enum{ATOM,LIST};
typedef struct glist_node
{
	int tag;			//ATOM或LIST 
	union
	{
		ElemType           data;	//ATOM 
		struct glist_node *head; 	//LIST 
	}item;
	struct glist_node *next;		//结点 
}GLNODE, *GLIST;

#endif