Thread: What's the difference from passing a int to char and a L L int to char?

And if i wanna use unsigned long long int?

(i really need this answer, its for an exam )

That's not how you use sprintf at all. Your parameters are out of order. Why don't you look at the documentation for sprintf?

Originally Posted by arpsmack

That's not how you use sprintf at all. Your parameters are out of order. Why don't you look at the documentation for sprintf?

right, i forgot that.. lol

Corrected!

I'm getting errors. OMG i'm doomed :'(

I need to turn int into unsigned long long int for this to work but this functions give me errors when area_camada,boxes_camada,wires_camada are unsigned long long int:

Code:

    void escreveDados() { //This one writes in char camadas_dados[], some data in this order/syntax: "%i-%i-%i]"
     char result[2000];
     sprintf(result,"%i-%i-%i]",area_camada,boxes_camada,wires_camada);
     printf("%i,%i,%i\n",area_camada,boxes_camada,wires_camada);
     strncpy(camadas_dados+p4,result,strlen(result));
     printf("camada_dados+p4: %s\n",&camadas_dados[p4]);
     p4 += strlen(result); //Deslocar p4 à direita
     area_camada = boxes_camada = wires_camada = 0;
     printf("p4: %i\n", p4);
    }


    void dadosCamada () { //This one reads what the above function wrote in char camadas_dados[]
         int s; //0 = area_camada, 1 = boxes_camada, 2 = wires_camada
         bk=pX;
         area_camada = boxes_camada = wires_camada = 0;
         s=0;
         while(camadas_dados[bk] != ']') {
         printf("**BK: %c\n",camadas_dados[bk]);
          if(isdigit(camadas_dados[bk])) {
           area_camada = (s == 0) ? area_camada*10 + (int)(camadas_dados[bk] - '0') : area_camada;
           boxes_camada = (s == 1) ? boxes_camada*10 + (int)(camadas_dados[bk] - '0') : boxes_camada;
           wires_camada = (s == 2) ? wires_camada*10 + (int)(camadas_dados[bk] - '0') : wires_camada;
           printf("c[bk]: %c \t c+bk: %i\n",camadas_dados[bk],wires_camada);
          }
          else s++;
          bk++;
         }
         printf("!!!!!!!!!!!!!!!!!!!%i,%i,%i\n",area_camada,boxes_camada,wires_camada);
         }

They work well if area_camada,boxes_camada,wires_camada are only int.

Please someone.. :'(

Originally Posted by Milhas

Please someone.. :'(

You quite carefully did not tell us what the errors actually are. My Hat of Guessing would like to remind you that it is not possible to print a long long int using %i, and that you must use %lli instead. (That's lowercase L lowercase L lowercase I.)

Originally Posted by tabstop

You quite carefully did not tell us what the errors actually are. My Hat of Guessing would like to remind you that it is not possible to print a long long int using %i, and that you must use %lli instead. (That's lowercase L lowercase L lowercase I.)

I'm trying to implement unsigned long long int.


But i'm getting this errors (after replacing every %i into &lli or %llu):

http://xs126.xs.to/xs126/08142/pic183.jpg

The green line is given by this command:

Code:

char result[2000];
sprintf(result,"%llu-%llu-%llu]",area_camada,boxes_camada,wires_camada);

What am i doing wrong? :''''(

The source code is here:
http://pastebin.com/m658c4c0b

I placed a "//////HERE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" marking the lines or functions where the error begins


If you dont want to see the whole code, the lines are this ones:

Code:

    int layers,boxes,wires,bk,s; //Dados Globais
    int camadas[1000],p1,p4,pX; //o pX serve como temporario para qualquer operação posterior
    unsigned long long int area_camada,boxes_camada,wires_camada; ///HERE!!!!!!
    int temp,camada_actual;
    float xmin,xmax,ymin,ymax;
    char c,tmp[3],camadas_dados[5000],*ptr; //ptr usado para receber um digito em char de cada vez
    
    int camadaExisteQ (int cId);
    void dadosCamada (); //Mete os dados da camada no "cache"
    void escreveDados(); //Grava o "cache" da camada actual
    void readNext(); //Procura o proximo valor e guarda-o no argumento


(...)


    void escreveDados() { //Writes the sprintf XXXXXX-XXXXXXX-XXXXXX] for the vars area_camada,boxes_camada,wires_camada
     char result[2000];
     sprintf(result,"%llu-%llu-%llu]",area_camada,boxes_camada,wires_camada);
     printf("!*!*!*!*!*!*!%llu-%llu-%llu]",area_camada,boxes_camada,wires_camada);
     strncpy(camadas_dados+p4,result,strlen(result));
     printf("camada_dados+p4: %s\n",&camadas_dados[p4]);
     p4 += strlen(result); //Deslocar p4 à direita
     area_camada = boxes_camada = wires_camada = 0;
     printf("p4: %i\n", p4);
    }

    void dadosCamada () { //Reads the data back to area_camada,boxes_camada,wires_camada
         int s; //0 = area_camada, 1 = boxes_camada, 2 = wires_camada
         bk=pX;
         area_camada = boxes_camada = wires_camada = 0;
         s=0;
         while(camadas_dados[bk] != ']') {
         printf("**BK: %c\n",camadas_dados[bk]);
          if(isdigit(camadas_dados[bk])) {
           area_camada = (s == 0) ? area_camada*10 + (unsigned long long int)(camadas_dados[bk] - '0') : area_camada;
           boxes_camada = (s == 1) ? boxes_camada*10 + (unsigned long long int)(camadas_dados[bk] - '0') : boxes_camada;
           wires_camada = (s == 2) ? wires_camada*10 + (unsigned long long int)(camadas_dados[bk] - '0') : wires_camada;
           printf("c[bk]: %c \t c+bk: %i\n",camadas_dados[bk],wires_camada);
          }
          else s++;
          bk++;
         }
         printf("!!!!!!!!!!!!!!!!!!!%i,%i,%i\n",area_camada,boxes_camada,wires_camada);
         }

Originally Posted by matsp

Can you post the variable declarations for:
area_camada,boxes_camada,wires_camada

--
Mats

Its there, is this one:

unsigned long long int area_camada,boxes_camada,wires_camada; ///HERE!!!!!!

Originally Posted by tabstop

Is dadosCamada the thing that's supposed to read "B 5 5 5 5"? If so, I get that you should get -156565655 out of that. (Since ' '-'0' is negative sixteen, and your "number" is " 5 5 5 5".) I don't think that's quite what you see, but I would expect the problem is in the computation, not the printing.

Edit: No, I'm wrong, I didn't see the isdigit() thing. So you should get 5555.

Yes, it must be the computation..

When i'm using unsigned long long int, what cares should i take manipulating them?

Alright, let's look at this:

Code:

box_data[temp] = (box_data[temp] < 0) ? atoi(ptr) : box_data[temp] * 10 + atoi(ptr);

If box_data is -999 it's supposed to be the first thing, so we do atoi to get the value, BUT: ptr does not point at a legitimate character array -- it starts with c, but then who knows what comes next? (Well, your compiler does, but the compiler is not forced to lay out your variables in any particular way.) So who knows what you get back from atoi?