need help converting c=fgetc to integer

[87vette]

i am using fgetc to read from a file.also my project uses a double link list here is a sample of my program c=fgetc here is the rest

else if (isdigit(c))//this use to delete from the link list
{
//delete();
//del=atoi(c);

//delNum=c;
if(del==0)
continue;
//del=atoi(delNum);
currptr=headptr;
delcount=1;
while(delcount!=del&&currptr!=NULL)
{
currptr=currptr->next;
delcount++;
}
if(currptr==NULL)
continue;
else if(currptr==headptr)
{
headptr=currptr->next;
headptr->prev=NULL;
temp=currptr;
}
else if(currptr==tailptr)
{
tailptr=currptr->prev;
temp=currptr;
tailptr->next=NULL; Nail the code

 

[DZH]

I don't get the question. May you please tell me what you really want. May be a direct and unambigous(sp) post would help.

 

[87vette]

I need to convert c to an integer that was i know which link to delete from the list. for example if i read a 4 from the file then i delete the 4th link from the list. i am trying to use atoi with c but i get an error.is there any other way i can parse the char c to an int? yes c is declared as char c. Nail the code

 

[DZH]

Declare c an del as integers. Then try this:

      del = c - 48;

OR this:

      del = c & 0xf;

to change the character c to an integer between 0 and 9.

 

[naveenprakashj]

hmmmm......... the above solution works only if there are less than 10 links!!!!
If your program reads an integer greater than 9 than it is a potential bug!!!

What I suggest is decare c as a charcter array. Then u can use atoi()

NOTE: atoi expects a character array (vector variable). Not a scalar variable. Hence the error in ur case.

The solution is....

char strInt[n] where n > 1 (actualy depends upon how how many characters the integer is made of. Also... reserve 1 space for the NULL character.

Next... read the value from the file.
then

del = atoi(strInt);

This will work.

cheers

 

[87vette]

how about if i would use this instead atoi(int(c)) do you guys think this would work. i am at work right now but i am
going to work on my program when i get home. the reason that i cannot declare c as integer is because i am also reading alphas from the files. i could do it all in hex but that means i will have to change my whole program thanks for everyones help. if you have any other suggestions this will be greatly appreciated Nail the code