hell@hells:/tmp/ctest$ cat 1.cpp        
 #include <memory.h>
 #include <stdio.h>
 
int main(void)
{
char x[10];
char y[10];
char z=9;

memset(x+z,0,1);
y[z]=0;

printf("%c %c", x[z], y[z] );

return 0;
}
hell@hells:/tmp/ctest$ cat 1.s
	.file	"1.cpp"
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%c %c"
	.text
	.align 2
.globl main
	.type	main, @function
main:
.LFB2:
	pushl	%ebp
.LCFI0:
	movl	%esp, %ebp
.LCFI1:
	subl	$12, %esp
.LCFI2:
	pushl	$0
	pushl	$0
	pushl	$.LC0
	movb	$0, -1(%ebp)
.LCFI3:
	call	printf
	xorl	%eax, %eax
	leave
	ret
.LFE2:
	.size	main, .-main
.globl __gxx_personality_v0
	.section	.eh_frame,"a",@progbits
.Lframe1:
	.long	.LECIE1-.LSCIE1
.LSCIE1:
	.long	0x0
	.byte	0x1
	.string	"zP"
	.uleb128 0x1
	.sleb128 -4
	.byte	0x8
	.uleb128 0x5
	.byte	0x0
	.long	__gxx_personality_v0
	.byte	0xc
	.uleb128 0x4
	.uleb128 0x4
	.byte	0x88
	.uleb128 0x1
	.align 4
.LECIE1:
.LSFDE1:
	.long	.LEFDE1-.LASFDE1
.LASFDE1:
	.long	.LASFDE1-.Lframe1
	.long	.LFB2
	.long	.LFE2-.LFB2
	.uleb128 0x0
	.byte	0x4
	.long	.LCFI0-.LFB2
	.byte	0xe
	.uleb128 0x8
	.byte	0x85
	.uleb128 0x2
	.byte	0x4
	.long	.LCFI1-.LCFI0
	.byte	0xd
	.uleb128 0x5
	.byte	0x4
	.long	.LCFI3-.LCFI1
	.byte	0x2e
	.uleb128 0xc
	.align 4
.LEFDE1:
	.ident	"GCC: (GNU) 4.1.2 20060613 (prerelease) (Debian 4.1.1-5)"
	.section	.note.GNU-stack,"",@progbits
hell@hells:/tmp/ctest$