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From: bhoughto@pima.intel.com (Blair P. Houghton)
Newsgroups: comp.lang.c
Subject: Re: casting ints and floats to char*
Message-ID: <4033@inews.intel.com>
Date: 26 Apr 91 02:46:08 GMT
References: <6185@mahendo.Jpl.Nasa.Gov>
Sender: news@inews.intel.com
Organization: Intel Corp, Chandler, AZ
Lines: 41

In article <6185@mahendo.Jpl.Nasa.Gov> robert@triton.JPL.NASA.GOV writes:
>Hello C people,
>	I'm trying to have a char* array point to different types, i.e
>hold addresses of ints,floats, and longs.
>
>I want to be able to do the following:
>
>void has_to_be_done_this_way()
>{
>char *ptr[12];

Use

    void *ptr[12];

instead.

>int  i;
>long j;
>double p;
>
>ptr[0] = &i;
>ptr[1] = &j;
>ptr[2] = &p;
>
>sscanf(buf,"%2d %5ld %15lf",&(*ptr[0]),&(*ptr[1]),&(*ptr[2]));

Use

    sscanf(buf,"%2d %5ld %15lf",(int *)ptr[0],(long *)ptr[1],(double *)ptr[2]);

instead.

>}

You might also look into declaring an array of unions rather
than one of pointers.

				--Blair
				  "If you want a more perfect union,
				   talk to Jefferson and Madison..."