String Parts

This is a discussion on String Parts within the Windows Programming forums, part of the Platform Specific Boards category; Hey, I have a string like this off a pop server: +OK 6 42638 I need to get the middle ...

  1. #1
    Registered User (TNT)'s Avatar
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    String Parts

    Hey,

    I have a string like this off a pop server:

    +OK 6 42638

    I need to get the middle number (6) in an int varible, so i think i just need to split the string up and use atoi(), can someone tell me how to do this baring in mind that the 6 could be any number.

    Thanks
    TNT
    TNT
    You Can Stop Me, But You Cant Stop Us All

  2. #2
    Guest Sebastiani's Avatar
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    Take the array and cycle through it, ignoring whitespace untill a char is found (use a flag ). This means you have reached the 'O' in '"OK". After this, ignore whiespace till the next char is found and start copying, turning copying off when a space is encountered. Cast the copied text with atoi(). The drawbacks of this is that the functionality is limited to that program. A better solution is to write a functin with this prototype (which is reusable):

    int get_next_number(char str[], int *next_position);

    whereas:

    int next = 0;

    char string[] = "Get 2 numbers from this 1 string";

    int two = get_next_number(string, &next);
    int one = get_next_number(string, &next);

    "two" should now contain the value '2', and "one" the value '1'.

    Hope that helps
    Code:
    if( numeric_limits< byte >::digits != bits_per_byte )
        error( "program requires bits_per_byte-bit bytes" );
    24bbs.cpp

  3. #3
    train spotter
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    Something like this will work
    Code:
    char     *pString=NULL;
    int      iNum=0;
    
    
    pString=sTextBuffer;
    while(*pString!='\0')
    {
        while(!isdigit(*pString++));//find the first number
        pString--;//back up to the first num
        iNum=atoi(pString);
        break;
    }
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