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資源截圖

代碼片段和文件信息

#include
#include
int?main(int?argcchar*argv[])//指針數組作為主函數,用于函數帶參數輸入
{???FILE?*fp;
??char?ch;
??unsigned?char?chrlchrh;
??unsigned?int?count=0checksum=0chr=0;
??unsigned?long?int?sum=0;
????if((fp=fopen(argv[1]“r“))==NULL)
??{
printf(“\n\n?File?can‘t?be?opened“);
exit(1);
??}
??printf(“\n\nthe?type?of?output:data---sum\n\n“);
??while(1)
??{
if((ch=fgetc(fp))!=EOF)
{
count++;
if(ch!=‘?‘)
{
if(count%12==0)
printf(“\n“);
if(ch>=‘0‘&&ch<=‘9‘)
ch-=‘0‘;
else
if(ch>=‘a‘&&ch<=‘f‘)
ch=ch-‘a‘+10;
else
if(ch>=‘A‘&&ch<=‘F‘)
ch=ch-‘A‘+10;
//計算8位的累加值將奇數位累加到長整型sum的15~8位偶數位累加到低8~0位
//避免了數據個數為奇偶的處理操作
if(count%2==1)
chrh=ch<<4;
else
{
chrl=ch&0x0f;
chr=chrh|chrl;
if(count%4==2)
sum+=chr<<8;
else
if(count%4==0)
sum+=chr;
printf(“%x--%lx???“chrsum);
}
}
else
{
count--;
}
}
else
{
if?(count?%?2?==?1?&&?count%4?!=3)
{?????chrl=ch&0x00;
???????????chr=chrh|chrl;
??sum+=chr<<8;
?? ??printf(“%x--%lx???“chrsum);
}
if(count%4==3)
{
?chrl=ch&0x00;
??????????chr=chrh|chrl;
??sum+=chr;
??printf(“%x--%lx???“chrsum);
}

break;
}
??}
??if(sum>>16)
??checksum=(sum>>16)+(sum&0x0000ffff);
??checksum=checksum&0x0000ffff;??
?? ??printf(“\n\nsum:%lx---checksum:%x“sumchecksum);
?? ??checksum?=?0xffff?-?checksum;
?? ???printf(“\n\nsum:%lx---checksum:%x“sumchecksum);
??printf(“\n\nsource:argc=%d\targv=%s\n“argcargv[1]);
??fclose(fp);
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????????14??2012-04-21?14:48??jiaoyan.txt

?????文件?????119808??2012-04-21?15:13??設計報告2.doc

?????文件???????1704??2012-04-21?15:11??check.c

-----------?---------??----------?-----??----

???????????????121526????????????????????3


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