Programming Forums - splitting up char and converting to int

Programming Forums (http://www.programmingforums.org/forumindex.php)

- C++ (http://www.programmingforums.org/forum15.html)

- - splitting up char and converting to int (http://www.programmingforums.org/showthread.php?t=13595)

splitting up char and converting to int

Ok, I need to take user input formatted like this
098|87|94|101|108|115|122|129|136|143|150|157|164|171|178|185|192|199|206|213|220|227|234|241|248

from a char array and separate the numbers and put them into an int array. Kind of like unix cut command using | as the delimiter. Any easy way to do this?

One of the strtok family.

yeah, I tried this

#include <string.h>

#include <stdio.h>



const char * ServerMessageDelimiters = "|";

#define MaxTokens   10

#define MaxTokenLength 255

#define MaxMessageLength (MaxTokens*(MaxTokenLength+1)-1)



int main()

{

   char msg[MaxMessageLength+1] =  "ABC|123456|654321|234234";



   char msgParts[MaxTokens][MaxTokenLength+1];



   int partNumber = 0;



   char * token = strtok( msg, ServerMessageDelimiters );



   while (  token != NULL

         && partNumber<MaxTokens

         && strlen(token) <  MaxTokenLength

         )

   {

       strcpy( msgParts[partNumber], token );

       token = strtok( NULL,  ServerMessageDelimiters );

       ++partNumber;

   }



   int i;

   for ( i = 0; i < partNumber; ++i )

   {

       printf( "%s\n", msgParts[i] );

   }

}

but I still have the problem of getting the char array into an int array

are vectors out of the question for this program? push_back( atoi( token ) ) would work.

One presumes, by the headers, that he's using C; thus no vectors. One you've separated out the strings, just convert them to numbers. Strtol comes to mind, as does sscanf. Atoi is bad news because you can't tell whether a returned zero is an error or a valid conversion.

never thought about that when using atoi, I'll have to keep that in mind. My C knowledge is very minimal, seeing as this is posted in the C++ forum, i thought i offer a C++ oriented solution.

thanks again for the insight on atoi.

just looking at the code here...

#define MaxMessageLength (MaxTokens*(MaxTokenLength+1)-1)



int main()

{

   char msg[MaxMessageLength+1] =  "ABC|123456|654321|234234";

why have the operations if your going to cancel them out ? unless i'm too tired to see why... :confused:

hey, I am using c++
did manage to get it to work with atoi(&msgParts[alphct])
but, my problem now is that in the bit of code I use to split up the char initializes the msgParts with char msgParts[MaxTokens][MaxTokenLength+1];

when I go to do something like this

while (alphct < textl)
{
msg2[alphct] = atoi(&msgParts[alphct]);
alphct += 1;
}
I get this
error: invalid conversion from �char*� to �char�
Im guessing because I initialised msg2 with just
int msg2 [6000];

So how did you manage it to work when you`re getting an error. And read DaWei`s post about atoi.

ok... here is the whole code. dont ask exactally what it does, its a bit obscure at the moment, but

http://www.core-switchnet.com/source

where you see

char msg3 [6000];

    int msg2 [6000];

    

    cout << "1";

    while (alphct < textl)

    {

            msg3[alphct] = msgParts[alphct][alphct];

            alphct += 1;

    }

should really be

char msg3 [6000];

    int msg2 [6000];

    

    cout << "1";

    while (alphct < textl)

    {

            msg3[alphct] = msgParts[alphct];

            alphct += 1;

    }

added the seccond [alphct] because for some strange reason, in the code in my previous post, they initialize msgParts as a multi dimensional variable, which I think is my problem. with the second [alphct] it compiled without errors, but stopped at a segment fault right after

while (  token != NULL

                 && partNumber<MaxTokens

                         && strlen(token) <  MaxTokenLength

                 )

           {

               strcpy( msgParts[partNumber], token );

               token = strtok( NULL,  ServerMessageDelimiters );

               ++partNumber;

           }



           int i;

           for ( i = 0; i < partNumber; ++i )

           {

               printf( "%s\n", msgParts[i] );

               textl += 1;

           }

           cout << "1";

and doesnt even reach the cout<< "1";

Quote:

Originally Posted by pegasus001 (Post 130917)

So how did you manage it to work when you`re getting an error. And read DaWei`s post about atoi.

I tried running that little bit by itself