Beispiele 4.4.2024

20230316/arrays-and-pointers-15.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test", "" };
+  for (char **p = a; **p; p++)
+    printf ("%s\n", p);
+  return 0;
+}

20230316/arrays-and-pointers-16.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test", "" };
+  for (char *p = a; *p; p++)
+    printf ("%s\n", p);
+  return 0;
+}

20230316/arrays-and-pointers-17.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test", "" };
+  for (char *p = a; *p; p += 5)
+    printf ("%s\n", p);
+  return 0;
+}

20230316/arrays-and-pointers-18.c

+#include <stdio.h>
+
+typedef char string5[5];
+
+int main (void)
+{
+  string5 a[] = { "Dies", "ist", "ein", "Test", "" };
+  for (string5 *p = a; *p; p++)
+    printf ("%s\n", *p);
+  return 0;
+}

20230316/arrays-and-pointers-19.c

+#include <stdio.h>
+
+typedef char string5[5];
+
+int main (void)
+{
+  string5 a[] = { "Dies", "ist", "ein", "Test", "" };
+  for (string5 *p = a; *p; p++)
+    printf ("%s\n", p);
+  return 0;
+}

20230316/arrays-and-pointers-20.c

+#include <stdio.h>
+
+typedef char string5[5];
+
+int main (void)
+{
+  string5 a[] = { "Dies", "ist", "ein", "Test", "" };
+  for (string5 *p = a; **p; p++)
+    printf ("%s\n", *p);
+  return 0;
+}

20230316/arrays-and-pointers-21.c

+#include <stdio.h>
+
+typedef char string5[5];
+
+int main (void)
+{
+  string5 *p = { "Dies", "ist", "ein", "Test", "" };
+  while (**p)
+    printf ("%s\n", *p++);
+  return 0;
+}

20230316/arrays-and-pointers-21.s

+	.file	"arrays-and-pointers-21.c"
+	.text
+	.section	.rodata
+.LC0:
+	.string	"Dies"
+	.string	"ist"         # manuell eingefügt
+	.string	"ein"         # manuell eingefügt
+	.string	"Test"        # manuell eingefügt
+	.text
+	.globl	main
+	.type	main, @function
+main:
+.LFB0:
+	.cfi_startproc
+	pushq	%rbp
+	.cfi_def_cfa_offset 16
+	.cfi_offset 6, -16
+	movq	%rsp, %rbp
+	.cfi_def_cfa_register 6
+	subq	$16, %rsp
+	leaq	.LC0(%rip), %rax
+	movq	%rax, -8(%rbp)
+	jmp	.L2
+.L3:
+	movq	-8(%rbp), %rax
+	leaq	5(%rax), %rdx
+	movq	%rdx, -8(%rbp)
+	movq	%rax, %rdi
+	call	puts@PLT
+.L2:
+	movq	-8(%rbp), %rax
+	movzbl	(%rax), %eax
+	testb	%al, %al
+	jne	.L3
+	movl	$0, %eax
+	leave
+	.cfi_def_cfa 7, 8
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	main, .-main
+	.ident	"GCC: (Debian 12.2.0-14) 12.2.0"
+	.section	.note.GNU-stack,"",@progbits

20230316/arrays-and-pointers-22.s

+	.file	"arrays-and-pointers-21.c"
+	.text
+	.section	.rodata
+.LC0:
+	.string	"Dies"
+	.string	"ist\000"     # manuell eingefügt
+	.string	"ein\000"     # manuell eingefügt
+	.string	"Test"        # manuell eingefügt
+	.string	""            # manuell eingefügt
+	.text
+	.globl	main
+	.type	main, @function
+main:
+.LFB0:
+	.cfi_startproc
+	pushq	%rbp
+	.cfi_def_cfa_offset 16
+	.cfi_offset 6, -16
+	movq	%rsp, %rbp
+	.cfi_def_cfa_register 6
+	subq	$16, %rsp
+	leaq	.LC0(%rip), %rax
+	movq	%rax, -8(%rbp)
+	jmp	.L2
+.L3:
+	movq	-8(%rbp), %rax
+	leaq	5(%rax), %rdx
+	movq	%rdx, -8(%rbp)
+	movq	%rax, %rdi
+	call	puts@PLT
+.L2:
+	movq	-8(%rbp), %rax
+	movzbl	(%rax), %eax
+	testb	%al, %al
+	jne	.L3
+	movl	$0, %eax
+	leave
+	.cfi_def_cfa 7, 8
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	main, .-main
+	.ident	"GCC: (Debian 12.2.0-14) 12.2.0"
+	.section	.note.GNU-stack,"",@progbits