On 22/10/2013 17:40, Steven D'Aprano wrote:
On Tue, 22 Oct 2013 15:39:42 +0000, Grant Edwards wrote:
No, I was thinking of an array. Arrays aren't automatically initialised
in C.
If they are static or global, then _yes_they_are_. They are zeroed.
Not that I don't believe you, but do you have a reference for this?
Because I keep finding references to uninitialised C arrays filled with
garbage if you don't initialise them.
Wait... hang on a second...
/fires up the ol' trusty gcc
[steve@ando c]$ cat array_init.c
#include<stdio.h>
int main()
{
int i;
int arr[10];
for (i = 0; i < 10; i++) {
printf("arr[%d] = %d\n", i, arr[i]);
}
printf("\n");
return 0;
}
[steve@ando c]$ gcc array_init.c
[steve@ando c]$ ./a.out
arr[0] = -1082002360
arr[1] = 134513317
arr[2] = 2527220
arr[3] = 2519564
arr[4] = -1082002312
arr[5] = 134513753
arr[6] = 1294213
arr[7] = -1082002164
arr[8] = -1082002312
arr[9] = 2527220
What am I missing here?
arr is local to main, not static or global.
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