C Programming Help[Gr]

[UnSponsored]

Exw mia argacia sthn sxolh sto ma8hma ths C kai exw kolisei se ena shmeio.

8elw na mou dosete enan kodika o opoios 8a diavazei enan Username kai 8a  dimiourgei to password etsi wste na einai to antistrofo tou username

 

px:

Diavazw ena username ( px "UnSponsored")

etsi wste Username = "UnSponsored"

8elw sthn metavlith Password na apo8ikeftei to aintistrofo tou 

etsi wste Password = "derosnopSnU"

 

 

 

thnx in advnace

Edited December 28, 2015 by UnSponsored

[Elfo]

This should do the trick:

#include <string.h> // for strlen()

// reverse the given null-terminated string in place
void inplace_reverse(char * str)
{
  if (str)
  {
    char * end = str + strlen(str) - 1;

    // swap the values in the two given variables
    // XXX: fails when a and b refer to same memory location
#   define XOR_SWAP(a,b) do\
    {\
      a ^= b;\
      b ^= a;\
      a ^= b;\
    } while (0)

    // walk inwards from both ends of the string, 
    // swapping until we get to the middle
    while (str < end)
    {
      XOR_SWAP(*str, *end);
      str++;
      end--;
    }
#   undef XOR_SWAP
  }
}

[xxdem]

can be done in a simplier way

 

this is a char array, so create a new array with strlen size and add chars to it iterating the first string backwards

 

ps: dont fuck up with the line feed if any or with the null character

 

theres a reverse function in string.h afaik no sure tho

Edited December 29, 2015 by xxdem

[UnSponsored]

thnx elfo,tha to tsekarw meta...twra exw ena alo provila

8elw na ftia3w enan pinaka 50x7 o opoios 8a periexei 50 accounts (grammes) kai 7 Stiles se (name,surname,year of borth,username,password .....ktlp....)kai ola afta 8a diavazontai apo on xrhsth.....

Egw mexri twra 3erw oti gia na apo8ikefsw ena onoma prepei na to valw sthn metavlith (f.e. name[16] ) pou sthn ousia einai 1x16 pinakas....

Ti pinaka prepei na ftia3w gia na apo8ikevw ola ta dedomena afta...

Afto pou eixa kanei htan na kanw enan pinaka 50(grames)x7(stiles)x16(xaraktires) alla mou eipan einai la8os kai den borw na to xrisimopoieisw akoma gt den to exoume didaxtei....

 

ps: eimai se polu newbie stadio

thnx in advance

[xxdem]

gelasa me to oti den apa3ioses kan na diavaseis afto pou egrapsa giati epsaxnes gia etimo kodika...

 

aftoi ftene pou sas dinoune kai ptixia

[UnSponsored]

gelasa me to oti den apa3ioses kan na diavaseis afto pou egrapsa giati epsaxnes gia etimo kodika...

 

aftoi ftene pou sas dinoune kai ptixia

lol veveos to diavasa,den edosa simasia gt vrika alou provlima pio sumantiko...episis den katalava kan ti i8eles na peis prwton gt ta agglika m einai gtp kai defteron epidi eimai too newbie sthn C.....anyway nvm...

 

oso gia to telefteo post pou ekana gia tous pinakes vrika ti lush..

nvm ty pados.

[Szakalaka]

lol the preprocessor inside function

[xxdem]

lol the preprocessor inside function

 

lets suppose that define is predefined lol

[Szakalaka]

It seems like someone tried very hard to imitate a lambda :)

[Elfo]

lol the preprocessor inside function

If you are talking about the code, i just googled shit, that was approved to be working. I don't mess with C shit. Not my area.

[UnSponsored]

void usernametopassword()
{
 len = strlen(username[p]);
 ptrinv = username[p] ; 
 k=len-1;
 for(j=0;j<len;j++)
 { 	
 password[p][k]= *ptrinv;
 	k--;
 	ptrinv++;	
 }
}

to ekana etsi kai doulepse,,,thnx gia to help.

You can lock it

Edited January 3, 2016 by UnSponsored

[MeVsYou]

Locked