strcpy

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Billy 2
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Level: Hangaround
Joined: Mon. Aug 4, 2003
Posts: 227 View posts
Location: Ireland
#1
Posted by Billy 2: Wed. May 20, 2009 - 04:08 PM
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Hi Freaks, See the following code below. I'm having a little trouble getting it to compile, and has usual, I don't have a clue why.

tcb_ptr->prog_id = strcpy(int8 *prog_id, int8 *program_name);

What I am trying to achieve is to copy the string array pointed to by "program_name to the new array pointed to by prog_id and return the new pointer to tcb_ptr->prog_id.
The only thing I can think of is, does the new array, "prog_id" need space allocated to it or do I have to allocate the space?
Once again, thanks for the help...

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Tools, Compilers and General Programming
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Gold Markclawson
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Joined: Mon. Jul 18, 2005
Posts: 101132 View posts
Location: (using avr-gcc in) Finchingfield, Essex, England
Posted by clawson: Wed. May 20, 2009 - 04:10 PM
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What are the "int8 *"s doing in there? Try:

tcb_ptr->prog_id = strcpy(prog_id, program_name);

And, yes, the destination MUST have allocated space. You can do:

char prog_id[20];
strcpy(prog_id, program_name);

or

char * prog_id;
prog_id=malloc(20);
strcpy(prog_id, program_name);

but do NOT be tempted to do:

char * prog_id;
strcpy(prog_id, program_name);

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