void main()
{
int i
for(i=1i<=200i++)//用一个for遁环就可以了。
printf("ab")
}
#include<stdio.h>/*库文件包含*/#include<string.h>/*用于字符串 *** 作*/
#include<stdlib.h>/*用于exit函数*/
/**************************************************************************
int check(char *c)
输入参数：
char *c: 输入的字符串
返回参数：
0：字符串中有不符合规定的字符
1: 字符串字符符合规定，没有不符合规定的字符.
功能：
检查字符串中有否除了 0-9, +,-,*,/,(,),之外的其他字符，
如果有，则返回0, 表示出现错误。
若没有，则返回1,表式字符串符合规定。
**************************************************************************/
int check(char *c)
{
int k=0
while(*c!='\0')
{
if((*c>='0' &&*c<='9') || *c=='+' ||
*c=='-' || *c=='*' || *c=='/' ||
*c=='.' || *c=='(' || *c==')' )
{
}
else
{
printf("input error, there have the char not the math expression char!\n")
return 0
}
if(*c=='(')
k++
else if(*c==')')
k--
c++
}
if(k!=0)
{
printf("input error, there is not have correct bracket '()'!\n")
return 0
}
return 1
}
/**************************************************************************
void move(char *f, double *s,int p)
输入参数：
char *f : 运算符数组
double *s: 数值数组
int p: 当前运算符数组位置。
返回参数:
无
功能：
将当前已经完成运算的运算符消去，同时将数值数组的位置调整以进行下一次运算。
传入值p若为3
则当前符号的数组位置为3.
f[3]=f[3+1].......f[len-2]=f[len-1] f[len-1]='\0'
s[i]=s[i+1].......s[len-1]=s[len] 因为数值比运算符多一个。
***************************************************************************/
void move(char *f, double *s,int p)
{
int i=0,len=strlen(f)
for(i=pi<leni++) /*将已经运算过的符号，空出来的位置用后面的符号来填充，*/
{ /*即把乘和除号的位置用后面的加和减号填充*/
f[i]=f[i+1]
s[i]=s[i+1]
}
s[i]=s[i+1]
f[len-1]='\0'
}
/**************************************************************************
double convnum(char *c)
输入参数：
char *c :由数字和小数点组成的字符，用以转换成double型的数值。
返回参数：
num:返回转换好的值。
功能：
将输入的字符串先将其小数点以前的部分复制到temp[]数组中，
若有小数点，则将小数点之后的数值，也就是小数部分先进行计算,值存入num中
计算完成后，再对整数部分进行计算，值加上小数部分的值，存入num中。
***************************************************************************/
double convnum(char *c)
{
double num=0.0
double a=1.0
int i=0,p=0,len=0
char temp[100]
int tempi=0
int start=0
int f=1 /*正负符号指示器，若为1则为正数，为－1，此数为负数*/
len=strlen(c)
if(c[0]=='-')
{
start=1
f=-1
}
for(i=starti<leni++)
{
if(c[i]=='.')
{
p=i
break
}
temp[tempi++]=c[i] /*将整数部分复制到temp[]中*/
}
temp[tempi]='\0'
if(p!=0)
{
for(i=p+1i<leni++) /*将小数部分计算出来*/
{
if(c[i]=='.') /*如果有多余的小数点，则表示输入错误*/
{
printf("there is more that one dot '.' in number!error!\n")
exit(0)
}
a=a*0.1
num+=(a*(c[i]-48))
}
}
a=1.0
len=strlen(temp) /*计算整数部分*/
for(i=len-1i>=0i--)
{
num=num+(a*(temp[i]-48))
a*=10
}
num=num*f
return num
}
/**************************************************************************
double good(char *c)
输入参数：
char *c :即将进行运算的字符串型数学表达式。如3.5+(2*3/5)
返回参数：
s[0]:计算结果将放入s[0]中
功能：
将输入的字符串中的数字分别调用convnum(char *c)函数进行数值变换，再将其依
次存入doulbe s[i]中，将加减乘除运算符依次存入字符串符号数组 char f[i]中，
然后如果遇到括号，则将括号内的字符串存入另一字符数组中，然后用此
good(char *c) 递归函数进行递归运算。 然后根据先乘除，后加减的顺序对已
存入数组的数值根 据存入字符串符号数组的运算符进行运算。结果存入s[0]中。
返回最终结果。
***************************************************************************/
double good(char *c) /*可递归函数*/
{ /*取得数值字符串，并调用convnum转换成double*/
char g[100],number[30] /*g,保存当前的表达式串,number保存一个数的所有字符*/
char f[80]/*保存所有的符号的堆栈*/
int fi=0/*保存符号的位置指针*/
double s[80]/*保存当前所有的数的一个堆栈*/
int si=0/*保存数字位置指针*/
int k=0/* 若k=1则表示有一对括号*/
int num=0,i=0/*num保存新括号内的字符数,i 保存number里的字符位置*/
int cc=0/*乘除符号数量*/
int jj=0/*加减符号数量*/
while(*c!='\0')/*当p==1 和k==0时，表示已经把括号里的内容全部复制到g[100]中了*/
{
k=0
num=0
switch(*c)
{
case '+': /*当前字符为+-乘除时则表示*/
case '-':
case '*':
case'/':
f[fi++]=*c
if(*c=='*' || *c=='/')
cc++
else
jj++
if(*(c-1)!=')')
{
number[i]='\0'
i=0/*完成一个数字的复制，其位置指针i=0*/
s[si++]=convnum(number)
}
break
case'(': /*有括号，则将当前括号作用范围内的全部字符保存，作为*/
k++/*一个新的字符表达式进行递归调用good函数计算。*/
while(k>0)
{
c++
g[num]=*c
num++
if(*c==')')
{
k--
}
else if(*c=='(')
{
k++
}
}
g[num-1]='\0'
num=0/*完成一个括号内容的复制，其位置指针num=0*/
s[si++]=good(g)
break
default:
number[i++]=*c
if(*(c+1)=='\0')
{ number[i]='\0'
s[si++]=convnum(number)
}
break
}
c++
}
f[fi]='\0'
i=0
while(cc>0)
{
switch(f[i])
{
case '*': cc--
s[i+1]=s[i]*s[i+1]
move(f,s,i)
break
case '/': cc--
s[i+1]=s[i]/(float)s[i+1]
move(f,s,i)
break
default:
i++
break
}
}
i=0
while(jj>0)
{
switch(f[i])
{
case '+': s[i+1]=s[i]+s[i+1]
jj--
move(f,s,i)
break
case '-': s[i+1]=s[i]-s[i+1]
jj--
move(f,s,i)
break
default:
printf("operator error!")
break
}
}
return s[0]
}
void main()
{
char str[100]
double sum=0
int p=1
while(1)
{
printf("enter expression: enter 'exit' end of program\n")
scanf("%s",str)
p=strcmp(str,"exit")
if(p==0)
break
p=check(str)
if(p==0)
continue
sum=good(str)
printf("%s=%f",str,sum)
printf("\n")
}
printf("good bye!\n")
}
无聊，粘着玩 657行#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdarg.h>
#include <ctype.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#include <Winsock2.h>
#include <ws2tcpip.h>
#include <io.h>
int raw2iframe(char *rawfile, char *ifile )
int Ts_pes(const char *src, const char *des ,unsigned short pid)
int pes_raw( char *pesfile, char *rawfile )
int es_pes(char *src, char *des)
int pes_ts(char *tsfile, char *pesfile)
static unsigned char m_buf[188 * 1024]
static unsigned char buf[188*1024]
/* 设置Dts时间戳(90khz) */
unsigned int SetDtsTimeStamp( unsigned char *buf, unsigned int time_stemp)
{
buf[0] = ((time_stemp >>29) | 0x11 ) &0x1f
buf[1] = time_stemp >>22
buf[2] = (time_stemp >>14) | 0x01
buf[3] = time_stemp >>7
buf[4] = (time_stemp <<1) | 0x01
return 0
}
/* 设置Pts时间戳(90khz) */
unsigned int SetPtsTimeStamp( unsigned char *buf, unsigned int time_stemp)
{
buf[0] = ((time_stemp >>29) | 0x31 ) &0x3f
buf[1] = time_stemp >>22
buf[2] = (time_stemp >>14) | 0x01
buf[3] = time_stemp >>7
buf[4] = (time_stemp <<1) | 0x01
return 0
}
/* 读取时戳(45khz) */
unsigned int GetTimeStamp( unsigned char *buf )
{
unsigned int ts
unsigned char *p = buf
ts = ((*p>>1) &0x7) <<30
p++
ts += (*p) <<22
p++
ts += ((*p)>>1) <<15
p++
ts += (*p) <<7
p++
ts += (*p) >>1
p++
return ts
}
/*主函数*/
int main(void)
{
Ts_pes("shoes.ts", "641.pes", 641) //提取PES
pes_raw("641.pes","641.raw") //提取ES
raw2iframe( "641.raw", "641.iframe" )//提取I帧
es_pes("641.iframe", "es.pes") //打包成PES
pes_ts("pes.ts","es.pes")//打包成TS
return 0
}
/*从视频中提取PES*/
int Ts_pes(const char *src, const char *des ,unsigned short pid)
{
unsigned char *p
FILE *fpr, *fpw
int size
int ret
unsigned short vpid
unsigned char adaptation_field_control
unsigned char continuity_counter
unsigned char adaptation_field_length
unsigned char *payload
unsigned char payload_unit_start_indicator
unsigned char last_counter = 0xff
int start = 0
fpr = fopen(src, "rb") //打开文件
fpw = fopen(des, "wb") //写入文件
if(NULL == fpr || NULL == fpw)
{
return -1
}
size = sizeof(m_buf)
while(!feof(fpr))
{
ret = fread(m_buf, 1, size, fpr )//读取文件
p = m_buf
while(p <m_buf + ret)
{
vpid = (p[1] &0x1f) <<8 | p[2]
if(pid == vpid)
{
adaptation_field_control = (p[3]>>4)&0x3//判断是否有可调整字段
continuity_counter = p[3] &0xf
payload_unit_start_indicator = (p[1]>>6) &0x1
payload = NULL
adaptation_field_length = p[4]
switch(adaptation_field_control)
{
case 0:
case 2:
break /*0为保留，2为只有调整无负载*/
case 1:
payload = p + 4/*无调整字段*/
break
case 3:
payload = p + 5 + p[4]/*净荷*/
break
}
if(1 == payload_unit_start_indicator)
{
start = 1
}
if(start &&payload)
{
fwrite(payload, 1, p + 188 - payload, fpw) //写入文件
}
if( last_counter!= 0xff &&((last_counter +1 )&0xf) != continuity_counter )
{
printf( "data lost\n" )
}
last_counter = continuity_counter
}
p = p + 188
}
}
printf("ts_pes_END\n")
fclose(fpr) //关闭
fclose(fpw)
return 0
}
/*从PES中提取ES*/
int pes_raw( char *pesfile, char *rawfile )
{
FILE *fpd, *fp
unsigned char *p, *payload, *tmp
int size, num, rdsize
unsigned int last = 0
__int64 total = 0, wrsize = 0
fp = fopen( pesfile, "rb" )
fpd = fopen( rawfile, "wb" )
if( fp == NULL || fpd == NULL )
return -1
num = 0
size = 0
p = m_buf
while( true )
{
REDO:
if( m_buf + size <= p )
{
p = m_buf
size = 0
}
else if( m_buf <p &&p <m_buf + size )
{
size -= p - m_buf
memmove( m_buf, p, size )
p = m_buf
}
if( !feof(fp) &&size <sizeof(m_buf) )
{
rdsize = fread( m_buf+size, 1, sizeof(m_buf)-size, fp )
size += rdsize
total += rdsize
}
if( size <= 0 )
break
tmp = p
/* 寻找PES-HEADER: 0X000001E0 */
while( p[0] != 0 || p[1] != 0 || p[2] != 0x01 ||
( ( p[3] &0xe0 ) != 0xe0 &&( p[3] &0xe0 ) != 0xc0 ) )
{
p++
if( m_buf + size <= p )
goto REDO
}
if( p != tmp )
{
printf( "pes skip size=%d\n", p - tmp )
}
/* PES_packet_length */
unsigned short len = (p[4]<<8) | p[5]
if( len == 0 )
{
unsigned char *end = p + 6
while( end[0] != 0 || end[1] != 0 || end[2] != 0x01 ||
( ( end[3] &0xe0 ) != 0xe0 &&( end[3] &0xc0 ) != 0xc0 ) )
{
if( m_buf + size <= end )
{
if( feof(fp) )
break
goto REDO
}
end++
}
len = end - p - 6
}
if( m_buf + size <p + 6 + len )
{
if( feof(fp) )
break
continue
}
p += 6
{
unsigned char PES_scrambling_control = (*p>>4)&0x3
unsigned char PES_priority = (*p>>3)&0x1
unsigned char data_alignment_indicator = (*p>>2)&0x1
unsigned char copyright = (*p>>1)&0x1
unsigned char original_or_copy = (*p)&0x1
p++
unsigned char PTS_DTS_flags = (*p>>6)&0x3
unsigned char ESCR_flag = (*p>>5)&0x1
unsigned char ES_rate_flag = (*p>>4)&0x1
unsigned char DSM_trick_mode_flag = (*p>>3)&0x1
unsigned char additional_copy_info_flag = (*p>>2)&0x1
unsigned char PES_CRC_flag = (*p>>1)&0x1
unsigned char PES_extension_flag = (*p)&0x1
p++
unsigned char PES_header_data_length = *p
p++
payload = p + PES_header_data_length
if (PTS_DTS_flags == 0x2 )
{
unsigned int pts
pts = (*p>>1) &0x7
pts = pts <<30
p++
pts += (*p)<<22
p++
pts += ((*p)>>1)<<15
p++
pts += (*p)<<7
p++
pts += (*p)>>1
p++
p -= 5
if( pts <last )
{
printf( "?\n" )
}
last = pts
}
else if( PTS_DTS_flags == 0x3 )
{
unsigned int pts, dts
pts = (*p>>1) &0x7
pts = pts <<30
p++
pts += (*p)<<22
p++
pts += ((*p)>>1)<<15
p++
pts += (*p)<<7
p++
pts += (*p)>>1
p++
dts = (*p>>1) &0x7
dts = dts <<30
p++
dts += (*p)<<22
p++
dts += ((*p)>>1)<<15
p++
dts += (*p)<<7
p++
dts += (*p)>>1
p++
p -= 10
printf( "num=%d dura=%d size=%d pts-dts=%d\n", num, pts - last, len-3-PES_header_data_length, (int)(pts-dts) )
if( pts <last )
{
printf( "?\n" )
}
last = pts
}
else if( PTS_DTS_flags != 0 )
{
printf( "error\n" )
}
if( fpd )
{
fwrite( p + PES_header_data_length, 1, len - 3 - PES_header_data_length, fpd )
wrsize += len - 3 - PES_header_data_length
}
num++
p += len - 3
}
payload = p
size -= p - m_buf
memmove( m_buf, p, size )
p = m_buf
}
fclose( fp )
fclose( fpd )
printf("pes_raw_END\n")
return 0
}
/*提取I帧*/
int raw2iframe(char *rawfile, char *ifile )
{
unsigned char *temp_p
unsigned char *p
unsigned char picture_coding_type
unsigned char buf[188*1024] = {0}
unsigned char pes_buf[32*1024] = {0}
unsigned short pid = 641
unsigned short t_pid = 0
int i = 0
int j = 0
int size = 0
int iLen = 0
int wiLen = 0
int temp_queue = 0
int temp_ifrem = 0
void *fps = CreateFile(rawfile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL) //打开读文件
void *fpd = CreateFile(ifile, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, 0 , NULL) //打开写文件
temp_p = NULL
while(1)
{
if (0 == ReadFile(fps, buf+size, sizeof(buf)-size, (unsigned long *)&iLen, NULL)) //读取文件内容
{
CloseHandle((HANDLE)fps)
return -1
}
if (0 == iLen)
{
break
}
p = buf
while( p + 6 <buf + iLen +size)
{
if (p[0] == 0x0 &&p[1] == 0x0 &&p[2] == 0x1)//是头进入
{
if (p[3] == 0x0 || p[3] == 0xB3 )
{
if ( (NULL != temp_p) &&((1 == temp_queue) || (1 == temp_ifrem)))
{
WriteFile(fpd, temp_p, p-temp_p, (unsigned long *)&wiLen, NULL) //写文件，先写序列头，再写I帧
temp_queue = 0
temp_ifrem = 0
temp_p = NULL
}
}
if (p[3] == 0xB3) //判断是视频序列，则初始化
{
temp_queue = 1
temp_p = p
}
picture_coding_type = (p[5]>>3) &0x7
if (p[3] == 0x0 &&1 == picture_coding_type) //判断是I帧，则初始化
{
temp_ifrem = 1
temp_p = p
}
}
p++
}
/*把多出来的内容写入下个BUF*/
if(NULL != temp_p)
{
size = buf + iLen + size - temp_p
memmove(buf, temp_p, size)
}
else
{
size = buf + iLen + size - p
memmove(buf, p, size)
}
temp_p = NULL
}
CloseHandle((HANDLE)fps)
CloseHandle((HANDLE)fpd)
printf("raw_iframe_END\n")
return 0
}
/*打包成PES*/
int es_pes(char *src, char *des)
{
FILE *iframe_fp, *pes_fp
unsigned char *p
unsigned char *temp_p = NULL
unsigned char buf[188*1024] = {0}
unsigned char pes_header[19]
unsigned short int pes_packet_length = 0
unsigned int framecnt = 0
unsigned char flag = 0
unsigned int Pts = 0
unsigned int Dts = 0
int i = 0
int size = 0
int iLen = 0
int wiLen = 0
int temp_que = 0
iframe_fp = fopen( src, "rb" )
pes_fp = fopen( des, "wb" )
if( iframe_fp == NULL || pes_fp == NULL )
{
return -1
}
while(!feof(iframe_fp))
{
iLen = fread(buf + size, 1, sizeof(buf) - size, iframe_fp)
p = buf
while( p + 3 <buf + iLen +size)
{
memset(pes_header, 0, sizeof(pes_header))
if (p[0] == 0x0 &&p[1] == 0x0 &&p[2] == 0x1 &&0xB3 == p[3])
{
if ((NULL != temp_p) &&(1 == temp_que))
{
LAST_I:
pes_packet_length = p - temp_p + 13
pes_header[4] = (pes_packet_length&0xff00) >>8
pes_header[5] = pes_packet_length&0x00ff
/*PES包头的相关数据*/
pes_header[0] = 0
pes_header[1] = 0
pes_header[2] = 0x01
pes_header[3] = 0xE0
pes_header[6] = 0x81
pes_header[7] = 0xC0
pes_header[8] = 0x0A
Dts = (framecnt + 1) * 40 * 90
Pts = framecnt * 40 * 90
SetPtsTimeStamp(&pes_header[9], Pts) //设置时间戳 PTS
SetDtsTimeStamp(&pes_header[14], Dts)//设置时间戳 DTS
framecnt++
if (0 == flag)
{
fwrite(pes_header, 1, sizeof(pes_header), pes_fp) //把PES包头写入文件
fwrite(temp_p, 1, p-temp_p, pes_fp) //把I帧写入文件
}
else
{
fwrite(pes_header, 1, sizeof(pes_header), pes_fp) //把PES包头写入文件
fwrite(temp_p, 1, p-temp_p+3, pes_fp) //把I帧写入文件
}
temp_p = NULL
}
if (p[3] == 0xB3)//判断是否到了下一个序列头
{
temp_p = p
temp_que = 1
}
}
p++
}
/*把多出来的内容写入下个BUF*/
if(NULL != temp_p)
{
if (feof(iframe_fp)) //把最后一帧写入文件
{
//flag = 1
goto LAST_I
}
size = buf + iLen + size - temp_p
memmove(buf, temp_p, size)
}
else
{
size = buf + iLen + size - p
memmove(buf, p, size)
}
temp_p = NULL
}
printf("es_pes_END\n")
fclose(iframe_fp)
fclose(pes_fp)
return 0
}
/*打包成TS包*/
int pes_ts(char *tsfile, char *pesfile)
{
FILE *ts_fp, *pes_fp
int flag = 0
int iLen = 0
int size = 0
int temp_pes = 0
int pes_packet_len = 0
unsigned char *p
unsigned char counter = 0
unsigned char *temp_p = NULL
unsigned char ts_buf[188] = {0}
unsigned char start_indicator_flag = 0
pes_fp = fopen(pesfile, "rb")
ts_fp = fopen(tsfile, "wb")
if( ts_fp == NULL || pes_fp == NULL )
{
return -1
}
/*设ts参数*/
ts_buf[0] = 0x47
ts_buf[1] = 0x62
ts_buf[2] = 0x81
while(!feof(pes_fp))
{
iLen = fread(buf+size, 1, sizeof(buf)-size, pes_fp) //读文件
p = buf
while( p + 6 <buf + iLen +size)
{
if (0 == p[0] &&0 == p[1] &&0x01 == p[2] &&0xE0 == p[3]) //进入
{
if (flag == 0) //第一次找到PES包
{
temp_p = p
flag = 1
}
else
{
pes_packet_len = p - temp_p //pes包长度
start_indicator_flag = 0
while (1)
{
ts_buf[3] = counter
if (1 != start_indicator_flag)
{
ts_buf[1] = ts_buf[1] | 0x40 //payload_unit_start_indicator置为1
start_indicator_flag = 1
}
else
{
ts_buf[1] = ts_buf[1] &0xBF //payload_unit_start_indicator置为0
}
if (pes_packet_len >184) //打包成TS包（188）
{
ts_buf[3] = ts_buf[3] &0xDF
ts_buf[3] = ts_buf[3] | 0x10
memcpy(&ts_buf[4], temp_p, 184)
fwrite(ts_buf, 1, 188, ts_fp) //写文件
pes_packet_len -=184
temp_p += 184
}
else //不够184B的加入调整字段，为空
{
ts_buf[3] = ts_buf[3] | 0x30
ts_buf[4] = 183 - pes_packet_len
memcpy(&ts_buf[4] + 1 + ts_buf[4], temp_p, pes_packet_len)
fwrite(ts_buf, 1, 188, ts_fp) //写文件
break
}
counter = (counter + 1) % 0x10 //ts包计数
}
}
temp_p = p
}
p++
}
if (1 == flag)
{
size = buf + iLen + size - temp_p
memmove(buf, temp_p, size)
temp_p = NULL
flag = 0
}
else
{
size =buf + iLen + size - p
memmove(m_buf , p , size)
}
}
printf("pes_ts_END\n")
fclose(pes_fp)
fclose(ts_fp)
return 0
}
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