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Copy data array

Started by programering Feb 28, 2003 at 4:13 AM 0 replies 300+ views

Original Post

Feb 28, 2003 at 4:13 AM

How do I copy a array to an other array? struct human_data *humans; humans = (struct human_data *) malloc(sizeof(struct human_data)*4); struct human_data *people; memcpy(humans,people); memset(...); // ????? How do memcpy() and memset() work, what''s their parameters? witch method shall I take to copy arrays? And then, what header file shall I #include? Anton Karlsson Klingis Entertainment Games with silly humor

CoiN

Feb 28, 2003 at 7:45 AM

Lo,

memset() works by filling a chunk of memory with a char sent in the params.

e.g.

    
struct test_struct 
{
    // whatever variables here

}

// THIS WOULD GO IN main()

test_struct test;

memset(&test, 0, sizeof(test));

Would fill the struct test with 0 basically clearing the structure of all data.

memcpy() is used to copy a chunk of memory from one structure, array, variable, etc, etc, to another.

e.g.

  
test_struct test1;
test_struct test2;

// Fill test1 with something


memcpy(&test2, &test1, sizeof(test1));

So now whatever was in test1 is now in test2.

If the items you are copying from/to are not the same sizes/types then it could cause problems.

Cya...

Coin

[edited by - CoiN on February 28, 2003 8:47:48 AM]

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