On Thu, Jul 01, 1999 at 03:19:05PM +1200, Michael Beattie wrote: > > The following problem will help me finish v0.1 of my wizard radio control > program which I will ITP and upload soon.. > > <prepared for flames> > > I know its the wrong place to ask, but its really easy, and I feel stupid > asking in a newsgroup.... > > string with value "number:" > > integer with value "444" > > I want the string to then have the value "number:444" > > this is the actual C code: (slightly snipped) > > int freq_num; > double freq; > char *rad_cmd; > > freq = atof(optarg); // optarg is "98.2" > > freq_num = (int) ((freq - 76) / 0.05); // gives 444 > > rad_cmd = "number:"; > > What now? i.e. rad_cmd+freq_num to give rad_cmd = "number:444" > strcat()? > > > </prepared for flames>
No, well, yes.. well.. for starters, you need a buffer, not a pointer. rad_cmd has no space to hold "number:444". Change it to char rad_cmd[x] where x is some number that will hold the maximum size of the string + 1. Then you can do... sprintf( rad_cmd, "number:%u", freq_num ); -- Please cc all mailing list replies to me, also. ========================================================================= * http://benham.net/index.html <[EMAIL PROTECTED]> <>< * * -------------------- * -----------------------------------------------* * Debian Developer, Debian Project Secretary, Debian Webmaster * * <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> * * <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> * =========================================================================
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