: 0xC0000005: 写入位置 0x01458000 时发生访问冲突----待解

`#include <stdio.h>
#include <stdio.h>

#define TOTAL 4 //人员总数

struct {
char name[20];
int num;
char sex;
char profession;
union {
float score;
char course[20];
}sc;
}bodys[TOTAL];

int main()
{
int i; //输入人员信息
for (i =0;i<TOTAL;i++)
{
printf(“Input info:”);
scanf_s("%s %d %c %c", &(bodys[i].name), &(bodys[i].num), &(bodys[i].sex), &(bodys[i].profession));
if (bodys[i].profession ==‘s’)
{
scanf_s("%f", &(bodys[i].sc.score));
}
else
{
scanf_s("%f", &(bodys[i].sc.course));
}
fflush(stdin);
}
//输出人员信息
printf("\nNam\t\tNum\tSex\tProfession\tScore/Course\n");
for (i =0;i<TOTAL;i++)
{
if (bodys[i].profession ==‘s’)
{
printf("%s\t%d\t%c\t%c\t\t%f\n", bodys[i].name, bodys[i].num, bodys[i].sex, bodys[i].profession, bodys[i].sc.score);
}
else
{
printf("%s\t%d\t%c\t%c\t\t%s\n", bodys[i].name, bodys[i].num, bodys[i].sex, bodys[i].profession, bodys[i].sc.course);
}
}
getchar();
return 0;
}`

page    ,132
title   memset - set sections of memory all to one byte

;***
;memset.asm - set a section of memory to all one byte
;
; Copyright Microsoft Corporation. All rights reserved.
;
;Purpose:
; contains the memset() routine
;
;*******************************************************************************

.xlist
include vcruntime.inc
.list
.xmm

page
;***
;char memset(dst, value, count) - sets “count” bytes at “dst” to “value”
;
;Purpose:
; Sets the first “count” bytes of the memory starting
; at “dst” to the character value “value”.
;
; Algorithm:
; char *
; memset (dst, value, count)
; char dst;
; char value;
; unsigned int count;
; {
; char start = dst;
;
; while (count–)
; dst++ = value;
; return(start);
; }
;
;Entry:
; char dst - pointer to memory to fill with value
; char value - value to put in dst bytes
; int count - number of bytes of dst to fill
;
;Exit:
; returns dst, with filled bytes
;
;Uses:
;
;Exceptions:
;
;**************************************************************************

CODESEG

extrn   __isa_available:dword
extrn   __isa_enabled:dword
extrn   __favor:dword

public  memset

memset proc
dst:ptr byte,
value:byte,
count:dword

    OPTION PROLOGUE:NONE, EPILOGUE:NONE

    .FPO    ( 0, 3, 0, 0, 0, 0 )

    mov     ecx, [esp + 0ch]             ; the number of bytes to be set
    movzx   eax, byte ptr[esp + 08h]     ; the value to be stored
    mov     edx, edi                     ; saving non-volatile edi
    mov     edi, [esp + 04h]; the dest pointer
    test    ecx, ecx; 0 ?
    jz      toend; if so, nothing to do
    imul    eax, 01010101h
    cmp     ecx, 020h; < 32 bytes use SmallMov
    jle     SmallMov
    cmp     ecx, 080h; For copies 32 < length < 128
    jl      XmmMovSmall
    bt      __favor, __FAVOR_ENFSTRG
    jnc     XMMMov; no jump

; Enhanced Fast Strings

    rep stosb                        ; store the values in the destination buffer
    mov     eax, dword ptr[esp + 04h]    ; return the original destination pointer
    mov     edi, edx                     ; restoring non-volatile edi
    ret

; XMM register usage

XMMMov :
bt __isa_enabled, __ISA_AVAILABLE_SSE2
jnc SmallMov ; if yes, use xmm large block set
movd xmm0, eax
pshufd xmm0, xmm0, 0

    add     ecx, edi                    ; ecx points to end of buffer
    movups  [edi], xmm0
    add     edi, 16                     ; point to next xmmword
    and     edi, -16                    ; align xmmword ptr
    sub     ecx, edi                    ; ecx is offset to end of buffer

    cmp     ecx, 080h
    jle     XmmMovSmall

align 16
LargeRangeBytes :
movdqa [edi], xmm0
movdqa [edi + 010h], xmm0
movdqa [edi + 020h], xmm0
movdqa [edi + 030h], xmm0
movdqa [edi + 040h], xmm0
movdqa [edi + 050h], xmm0
movdqa [edi + 060h], xmm0
movdqa [edi + 070h], xmm0
lea edi, [edi + 080h]
sub ecx, 080h
test ecx, 0FFFFFF00h
jnz LargeRangeBytes
jmp XmmSmallLoop

; Do not require 16-byte alignment for sizes lesser than 128 bytes when using XMM registers
XmmMovSmall :
bt __isa_enabled, __ISA_AVAILABLE_SSE2
jnc SmallMov ; if yes, use xmm large block set
movd xmm0, eax
pshufd xmm0, xmm0, 0

align 16

XmmSmallLoop :
cmp ecx, 32
jb XMMTrailingBytes
MidRangeBytes :
movdqu [edi], xmm0
movdqu [edi + 010h], xmm0

    add     edi, 020h
    sub     ecx, 020h
    cmp     ecx, 32                     ; checking number of 32 byte blocks left
    jnb     MidRangeBytes

    test    ecx, 01Fh                   ; check to see if there are bytes left
    jz      toend

XMMTrailingBytes:
; Remaining bytes written with two stores that may overlap instead of 1 byte at a time
lea edi, [edi + ecx - 020h]
movdqu [edi], xmm0
movdqu [edi + 010h], xmm0
mov eax, dword ptr [esp + 04h] ; return the original destination pointer
mov edi, edx ; restoring non-volatile edi
ret

; Copying less than or equal to 32 bytes

SmallMov:
test ecx, 03h ; check if there are bytes that can be stored
jz DwordTest

ByteLoop:
mov [edi], al
inc edi
sub ecx, 1
test ecx, 03h
jnz ByteLoop

DwordTest:
test ecx, 04h ; checking if there are dword blocks that can be set
jz QwordTest
mov [edi], eax
add edi, 4
sub ecx, 4
QwordTest:
test ecx, 0FFFFFFF8h
jz toend
align 16
QwordLoop:
mov [edi], eax
mov [edi + 04h], eax
add edi, 8
sub ecx, 8
test ecx, 0FFFFFFF8h
jnz QwordLoop

toend:
mov eax, dword ptr[esp + 04h] ; return the original destination pointer
mov edi, edx ; restore non-volatile edi
ret

memset endp

end