本地录入数据的时候出错，砥砺，弄好久了
程序代码：#include <stdio.h>
#include <stdlib.h>
unsigned char xorTarget;//全局变量声明
unsigned char addTarget;
unsigned int orgValue;
unsigned char *p = NULL;
int n = 0;
int i = 0;
struct header//页眉结构体（本地保存时写入）
{
char sav[30];
char SAV[30];
}boy=
{
"xorTarget\taddTarget\torgValue\n",
"你输入的数据如下：\n"
};
unsigned char GetXorValue ( unsigned char* pData, int nSize)//xor校验
{
unsigned char xorTarget = 0;
for ( i = 0; i < nSize; i++ ) xorTarget ^= pData[ i];
return xorTarget;
}
unsigned char GetAddValue ( unsigned char* pData, int nSize)//add校验
{
unsigned int addTarget = 0;
for ( i = 0; i < nSize; i++ )
addTarget = ( addTarget + pData [ i] ) &0xff;
return ( unsigned char) addTarget;
}
unsigned int GetCRCValue( unsigned char* pData, int nSize)//crc校验
{
int j;
unsigned int orgValue = 0xffff , crcConst = 0xa001;
for ( i = 0; i< nSize; i++ )
{
orgValue ^= ( unsigned int) pData[ i+ 1];
for ( j = 0; j<= 7; j++ )
{
if ( 1 == ( orgValue& 1) )
{
orgValue >>= 1;
orgValue ^= crcConst;
}
else
orgValue >>= 1;
}
}
return orgValue;
}
void save()//数据保存
{
FILE *fp;
char file[50];
int flag = 0;//排版标志变量
int N;
printf("\n请输入你要保存的数据个数：\n\n");
scanf("%d",&N);
printf("\n请输入要保存的地址:\n");
getchar();
gets(file);
if((fp=fopen(file,"w"))==NULL)
{
printf("\n保存失败\n");
getch();
exit(0);
}
fprintf(fp,"%s\n",boy.SAV);//写入页眉"你输入的数据如下：\n"
for(i=0;i<N;i++)
{
fprintf(fp,"%X\t",*(p+i));//写入用户输入的数据
flag++;
if(flag==4)
{
fprintf(fp,"\n\n");//数据排版
flag = 0;
}
}
fprintf(fp,"\n\n");//空行，用于排版
fprintf(fp,"校验结果如下：\n\n");
fprintf(fp,"%s\n",boy.sav);//写入页眉"xorTarget\taddTarget\torgValue\n"
fprintf(fp,"0x%X\t\t0x%X\t\t%u",xorTarget,addTarget,orgValue);//写入校验结果
fclose(fp);
printf("\n数据已保存%s中\n",file);
}
void input() //数据读取函数！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！
{
FILE *fp;
char file[30];
printf("\n请输入你要录入的文件地址：\n");
getchar();
gets(file);
if((fp=(file,"r"))==NULL)
{
printf("\ncannot open\n");
exit(0);
}
p=(unsigned char*)malloc(sizeof(unsigned char));
fscanf(fp,"%x",p);
while(!feof(fp))
{
i++;
p=(unsigned char* )malloc(sizeof(unsigned char));
fscanf(fp,"%x",p+i);
}
}
void main(void)
{
start:
printf("\t\t\t简单数据校验\n\n");//主菜单
printf("1.从键盘录入数据\n");
printf("2.从本地录入数据\n");
printf("3.异或校验\n");
printf("4.累加和校验\n");
printf("5.循环冗余校验\n");
printf("6.数据保存\n");
printf("7.退出校验\n");
printf("\n请输入你的选择(1~7):");
scanf("%d",&i);
if(i<1||i>7)
{
printf("\n输入错误\n");
goto start;
}
switch(i)
{
case 1://数据录入
{
system("CLS");
int i;
printf("\n请输入你要录入的数据个数：\n");
scanf("%d",&n);
printf("\n你要输入%d个数据:\n",n);
p=(unsigned char *)malloc(n*sizeof(unsigned char));
if(p==NULL)
{
printf("\n --is null-- \n");
exit(1);
}
for(i=0;i<n;i++)
scanf("%x",p+i);
printf("\n你输入的数据如下：\n\n");
for(i=0;i<n;i++)
printf("%x\t",*(p+i));
printf("\n\n");
printf("\n按任意键返回\n");
getch();
system("CLS");
main();
}
case 2:
{
input();
printf("\n你录入的数据如下：\n\n");
for(i=0;i<n;i++)
printf("%x\t",*(p+i));
printf("\n按任意键返回\n");
getch();
system("CLS");
main();
}
case 3://xor校验
{
system("CLS");
xorTarget = GetXorValue(p,n);//函数调用
printf("异或校验结果：0x%X\n",xorTarget);
printf("\n按任意键返回\n");
getch();
system("CLS");
main();
}
case 4://累加和校验
{
system("CLS");
addTarget = GetAddValue(p,n);
printf("累加和校验结果：0x%X\n",addTarget);
printf("\n按任意键返回\n");
getch();
system("CLS");
main();
}
case 5://CRC校验
{
system("CLS");
orgValue = GetCRCValue(p,n);
printf("循环冗余校验结果：%u\n",orgValue);
printf("\n按任意键返回\n");
getch();
system("CLS");
main();
}
case 6://保存
{
system("CLS");
save();
printf("\n按任意键返回\n");
getch();
system("CLS");
main();
}
case 7://退出
{
system("CLS");
free(p);
printf("\n谢谢使用！\n");
exit(0);
}
}
}[ 本帖最后由 jianyuling00 于 2012-6-14 22:32 编辑 ]
