首先打开VC++6.0

选择文件，新建

选择C++ source file 新建一个空白文档

先声明头文件

#includestdio.h

#includectype.h

#includedos.h

#includedir.h

#includestat.h

#includeio.h

#includestring.h

主函数

int main()

{

struct ffblk ffblock;

struct date today;

struct time now;

FILE *fp;

register long int dfv;

char pat;

int virus=0,vsize=0;

clrscr();

printf(*********************************\n);

printf(| This is a virus test function |\n);

printf(*********************************\n\n);

printf(Testing virus.................\n\n);

/*取得当前工作路径*/

getcwd(pat,128);

/*切换目录*/

chdir(pat);

/*找到文件COMMAND.COM*/

dfv=findfirst(\\*.*,ffblock,23);

while(!dfv)

{

if(!strcmp(ffblock.ff_name,COMMAND.COM));

vsize=ffblock.ff_fsize/100;

dfv=findnext(ffblock);

}

if(vsize!=0vsize!=478vsize!=232vsize!=253vsize!=2237159vsize!=252)

{

vsize=0;

printf(This is virus in your computer\n);

virus=1;

}

if((fp=fopen(record.txt,w))==NULL)

{

printf(Cant open the file record.txt\n);

exit(0);

}

/*取得日期时间*/

getdate(today);

gettime(now);

/*记录病毒信息到文件 record.txt*/

if(virus==1)

fprintf(fp,%d-%d-%d-%d:%0d,today.da_year,today.da_mon,today.da_day,now.ti_hour,now.ti_min);

else

printf(Dont find virus in your computer\n);

fclose(fp);

getch();

return 0;

}