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String to integer

Discussion in 'C' started by meyup, May 30, 2010.

  1. meyup

    meyup New Member

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    I want out of a
    Code:
    char szBuffer [5]
    so ultimately a string in which a number is that number read out and store in an Integer. Does anyone have a clever solution?
     
  2. techme

    techme New Member

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    If only you could figure stands inside an
    atoi () or () atof take.
    atoin spits an integer, a float atof out.

    If in a specific location is also only one number can
    number = szBuffer [2]; make
     
  3. meyup

    meyup New Member

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    Cool, thanks.
     
  4. creative

    creative New Member

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    Better,

    Code:
    Number = szBuffer [2] - ' 0';	
    Code:
    Number = szBuffer [2] - ' 0';
    otherwise you get the value of a character ....
     
  5. inspiration

    inspiration New Member

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    If you want to read several things from NEM machs string, so:
    Code:
    char * string; 
    . 
    . 
    . 
    scanf (string, "% d", & number);
    . 
    . 
    .
     
  6. meyup

    meyup New Member

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    Thank you for the many replies.
     
  7. techinspiration

    techinspiration New Member

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    due to this story:
    someone knows how to use strtol, int to string convert? (with, for example?)
     
  8. creative

    creative New Member

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    @ Peter pan
    strtol for string to long int

    Otherwise, look at the manpage

    Code:
    Strtol (3) Linux Programmer's Manual strtol (3) 
    
    NAME 
    strtol - convert a string to a long integer. 
    
    SYNOPSIS 
    # include <stdlib.h> 
    
    long int strtol (const char * nptr, char ** endptr, int base); 
    
    DESCRIPTION 
    The strtol () function converts the string in nptr to a 
    long integer value according to the given base, which must 
    be between 2 and 36 inclusive, or be the special value 0th 
    
    The string must begin with an arbitrary amount of white 
    space (as determined by isspace (3)) followed by a single 
    optional `+ 'or` -' sign. If base is zero or 16, the 
    string may then include a `0x 'prefix, and the number will 
    be read in base 16, otherwise, a zero base is taken as 10 
    (decimal) unless the next character is `0 ', in which case 
    it is taken as 8 (octal). 
    The remainder of the string is converted to a long int 
    value in the obvious manner, stopping at the first charac 
    ter which is not a valid digit in the given base. (In 
    bases above 10, the letter `A 'in either upper or lower 
    case represents 10, `B 'represents 11, and so forth, with 
    Z 'representing `35th) 
    
    If endptr is not NULL, strtol () stores the address of the 
    first invalid character in * endptr. If there were no dig 
    its at all, strtol () stores the original value of nptr in 
    * endptr (and returns 0). In particular, if * nptr is not 
    `\ 0 'but ** endptr is` \ 0' on return, the entire string is 
    valid. 
    
    RETURN VALUE 
    The strtol () function returns the result of the conver 
    sion, unless the value would underflow or overflow. If at 
    underflow occurs, strtol () returns LONG_MIN. If an over 
    flow occurs, strtol () returns LONG_MAX. In both cases, 
    errno is set to ERANGE. 
    
    ERRORS 
    ERANGE The given string was out of range, the value con 
    verted has been clamped. 
    
    conforming TO 
    SVID 3, BSD 4.3, ISO 9899 
    
    SEE ALSO 
    atof (3), atoi (3) atol (3), strtod (3), strtoul (3) 
    
    BUGS 
    Ignores the current locale. 
    
    GNU 1995-06-10 strtol (3)
     

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