ft_headsetl,ft_headseti,ft_headsetr,ft_headsets -Fitsy FITS header set routines.
SYNOPSIS
 
FITSCard ft_headsetl(FITSHead fits, char *name, int n, int lvalue, char *comm); FITSCard ft_headseti(FITSHead fits, char *name, int n, int ivalue, char *comm); FITSCard ft_headsetr(FITSHead fits, char *name, int n, double rvalue, int prec, char *comm); FITSCard ft_headsets(FITSHead fits, char *name, int n, char *svalue, char *comm);
 Find a FITS card in the header and format a logical value into it.
ft_headseti
 Find a FITS card in the header and format a logical value into it.
ft_headsetr
 Find a FITS card in the header and format a logical value into it.
ft_headsets
 Find a FITS card in the header and format a logical value into it.
EXAMPLES
Set the value part of a card in a header:
                int     i = 15;
                double  d = 34.7;
                char   *c = "Shutter";
                FITSCard        fits;
                FITSCard        card;
        card = ft_headsetl(fits, "Cosmic", 0, 1, "Removed Cosimics (silver bullet method)");
        card = ft_headseti(fits, "IValue" , 0, i, "15 is the number");
        card = ft_headsetr(fits, "Gain", 1, d, 2, "GAIN1");
        card = ft_headsetr(fits, "Gain", 2, d, 2, "GAIN2");
        card = ft_headsets(fits, "XHIST", 1, "Xray processed!", NULL);
        /* In this example the special pointer ft_comment is used to 
           use the existing comment in the card.
         */
        card = ft_headsets(fits, "FILTER", 0, "V", ft_comment);