9 结构体

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李延 LV6 2022-06-07

悬赏：20积分

# 结构体

```c
#include <stdio.h>

struct Books {
    char title[50];
    char author[50];
    char subject[100];
    int book_id;
};

void pring(struct Books book) {
    printf("title : %s\nauthor: %s\nsubject: %s\nbook_id: %d\n", book.title, book.author, book.subject, book.book_id);
}

int main() {
    struct Books book = {"C books", "RUNOOB", "A programming language", 123456};
    pring(book);
    return 0;
}
```

```asm
    .file  "struct.c"
   .section   .rodata.str1.8,"aMS",@progbits,1
   .align 8
.LC1:
   .string    "title : %s\nauthor: %s\nsubject: %s\nbook_id: %d\n"
   .text
   .globl pring
   .type  pring, @function
pring:
.LFB11:
   .cfi_startproc
   subq   $8, %rsp
   .cfi_def_cfa_offset 16
   movl   216(%rsp), %r8d
   leaq   116(%rsp), %rcx
   leaq   66(%rsp), %rdx
   leaq   16(%rsp), %rsi
   movl   $.LC1, %edi
   movl   $0, %eax
   call   printf
   addq   $8, %rsp
   .cfi_def_cfa_offset 8
   ret
   .cfi_endproc
.LFE11:
   .size  pring, .-pring
   .section   .rodata
   .align 32
.LC0:
   .string    "C books"
   .zero  42
   .string    "RUNOOB"
   .zero  43
   .string    "A programming language"
   .zero  77
   .long  123456
   .text
   .globl main
   .type  main, @function
main:
.LFB12:
   .cfi_startproc
   subq   $424, %rsp
   .cfi_def_cfa_offset 432
   leaq   208(%rsp), %rdi
   movl   $.LC0, %esi
   movl   $25, %ecx
   rep movsq
   movl   (%rsi), %eax
   movl   %eax, (%rdi)
   movq   %rsp, %rdi
   leaq   208(%rsp), %rsi
   movb   $25, %cl
   rep movsq
   movl   (%rsi), %eax
   movl   %eax, (%rdi)
   call   pring
   movl   $0, %eax
   addq   $424, %rsp
   .cfi_def_cfa_offset 8
   ret
   .cfi_endproc
.LFE12:
   .size  main, .-main
   .ident "GCC: (GNU) 4.8.5 20150623 (Red Hat 4.8.5-44)"
   .section   .note.GNU-stack,"",@progbits
```

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