countdos.c

CCodes

于 2007-11-08 12:54:00 发布

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分类专栏： C 文章标签： function dos include disk

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name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"> #include <stdio.h>
#include <dos.h>
#include <dir.h>

int function[255]; // DOS services

void interrupt far (*original_handler)();

void interrupt far handler(void)
{
char i;

   asm { mov i, ah }

   function[i]++;

   _chain_intr(original_handler);
}

void main(void)
{
   int i;

   for (i = 0; i < 255; i++)    // Zero the function counts
     function[i] = 0;

   original_handler = _dos_getvect(0x21);
   _disable();
   _dos_setvect(0x21, handler);
   _enable();

printf("This is a message/n");
fprintf(stdout, "This is a second message/n");

printf("Current disk is %c/n", getdisk() + 'A');

   _disable();
   _dos_setvect(0x21, original_handler);
   _enable();

   for (i = 0; i <= 255; i++)
     if (function[i])
       printf("Function %x called %d times/n", i, function[i]);
}