U. xml

Pre {border-style: solid; border-width: 1px; border-color: #000; line-Height: 1; color: # 0366ab; font-size: 16px ;}. sysfunc {color: #005080; font-style: italic; font-weight: bold ;}. selffuc {color: # 4bbc8b ;}. bool {color: #0c0a08 ;}. condition {color: #771334; font-weight: bold ;}. key {color: # d10bab ;}. vaR {color: #008023; font-style: italic ;}. digit {color: #5a0080; font-weight: bold ;}. includepre {color: # 0366ab ;}. operator_d {color: #008000; font-weight: bold ;}. operator_x {color: #440080; font-weight: bold ;}

Function Name :? Ultoa?

?? Yes :? Convert an unsigned long integer to a string?

Use ?? Method :? Char? * Ultoa (unsigned? Long? Value ,? Char? * String ,? Int? Radix );?

Program example :?

  
   #include?<stdlib.h>?#include?<stdio.h>?int?main(?void?)?{????unsigned?long?lnumber?=?3123456789L;????char?string[25];????ultoa(lnumber,string,10);????printf("string?=?%s??unsigned?long?=?%lu\n",string,lnumber);????return?0;?}???????
   
  

Function Name :? Ungetc?

?? Yes :? Return a character to the input stream?

Use ?? Method :? Int? Ungetc (Char? C ,? File? * Stream );?

Program example :?

  
   #include?<stdio.h>?#include?<ctype.h>?int?main(?void?)?{????int?i=0;????char?ch;????puts("Input?an?integer?followed?by?a?char:");????/*?read?chars?until?non?digit?or?EOF?*/????while((ch?=?getchar())?!=?EOF?&&?isdigit(ch))???????i?=?10?*?i?+?ch?-?48;?/*?convert?ASCII?into?int?value?*/????/*?if?non?digit?char?was?read,?push?it?back?into?input?buffer?*/????if?(ch?!=?EOF)???????ungetc(ch,?stdin);????printf("i?=?%d,?next?char?in?buffer?=?%c\n",?i,?getchar());????return?0;?}???????
   
  

Function Name :? Ungetch?

?? Yes :? Return a character to the keyboard buffer?

Use ?? Method :? Int? Ungetch (Int? C );?

Program example :?

  
   #include?<stdio.h>?#include?<ctype.h>?#include?<conio.h>?int?main(?void?)?{????int?i=0;????char?ch;????puts("Input?an?integer?followed?by?a?char:");????/*?read?chars?until?non?digit?or?EOF?*/????while((ch?=?getche())?!=?EOF?&&?isdigit(ch))???????i?=?10?*?i?+?ch?-?48;?/*?convert?ASCII?into?int?value?*/????/*?if?non?digit?char?was?read,?push?it?back?into?input?buffer?*/????if?(ch?!=?EOF)???????ungetch(ch);????printf("\n\ni?=?%d,?next?char?in?buffer?=?%c\n",?i,?getch());????return?0;?}???????
   
  

Function Name :? Unixtodos?

?? Yes :? Convert date and time to DOS format?

Use ?? Method :? Void? Unixtodos (long? Utime ,? Struct? Date? * Dateptr ,?

  
   ???struct?time?*timeptr);?
   
  

Program example :?

  
   #include?<stdio.h>?#include?<dos.h>?char?*month[]?=?{"---",?"Jan",?"Feb",?"Mar",?"Apr",?"May",?"Jun",??????????????????"Jul",?"Aug",?"Sep",?"Oct",?"Nov",?"Dec"};?#define?SECONDS_PER_DAY?86400L??/*?the?number?of?seconds?in?one?day?*/?struct?date?dt;?struct?time?tm;?int?main(void)?{????unsigned?long?val;?/*?get?today‘s?date?and?time?*/????getdate(&dt);????gettime(&tm);????printf("today?is?%d?%s?%d\n",?dt.da_day,?month[dt.da_mon],?dt.da_year);?/*?convert?date?and?time?to?unix?format?(number?of?seconds?since?Jan?1,?1970?*/????val?=?dostounix(&dt,?&tm);?/*?subtract?42?days?worth?of?seconds?*/????val?-=?(SECONDS_PER_DAY?*?42);?/*?convert?back?to?dos?time?and?date?*/????unixtodos(val,?&dt,?&tm);????printf("42?days?ago?it?was?%d?%s?%d\n",?????????dt.da_day,?month[dt.da_mon],?dt.da_year);????return?0;?}???????
   
  

Function Name :? Unlink?

?? Yes :? Delete a file?

Use ?? Method :? Int? Unlink (Char? * Filename );?

Program example :?

  
   #include?<stdio.h>?#include?<io.h>?int?main(void)?{????FILE?*fp?=?fopen("junk.jnk","w");????int?status;????fprintf(fp,"junk");????status?=?access("junk.jnk",0);????if?(status?==?0)???????printf("File?exists\n");????else???????printf("File?doesn‘t?exist\n");????fclose(fp);????unlink("junk.jnk");????status?=?access("junk.jnk",0);????if?(status?==?0)???????printf("File?exists\n");????else???????printf("File?doesn‘t?exist\n");??????return?0;?}???????
   
  

Function Name :? Unlock?

?? Yes :? Remove the File Share lock?

Use ?? Method :? Int? Unlock (Int? Handle ,? Long? Offset ,? Long? Length );?

Program example :?

  
   #include?<io.h>?#include?<fcntl.h>?#include?<sys\stat.h>?#include?<process.h>?#include?<share.h>?#include?<stdio.h>?int?main(void)?{????int?handle,?status;????long?length;????handle?=?sopen("c:\\autoexec.bat",O_RDONLY,SH_DENYNO,S_IREAD);????if?(handle?<?0)????{????????printf("sopen?failed\n");????????exit(1);????}????length?=?filelength(handle);????status?=?lock(handle,0L,length/2);????if?(status?==?0)???????printf("lock?succeeded\n");????else???????printf("lock?failed\n");????status?=?unlock(handle,0L,length/2);????if?(status?==?0)???????printf("unlock?succeeded\n");????else???????printf("unlock?failed\n");????close(handle);????return?0;?}??????????
   
  

Used in this article? Calligraphy and painting novel software? Released, the content has nothing to do with the software, and the painting and calligraphy novel software? More comfortable reading, more comfortable writing, and easier Publishing.

U. xml