C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(24)
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1. setvectº¯Êý
setvectº¯ÊýµÄ¹¦ÄÜÊÇÉèÖÃÖжÏʸÁ¿Èë¿Ú£¬ÆäÓ÷¨Îª£ºvoid setvect(int intr_num, void interrupt(*isr)());³ÌÐòʵÀýÈçÏ£º
#include <stdio.h>
#include <dos.h>
#include <conio.h>
#define INTR 0X1C
void interrupt ( *oldhandler)(void);
int count=0;
void interrupt handler(void)
{
count++;
oldhandler();
}
int main(void)
{
oldhandler = getvect(INTR);
setvect(INTR, handler);
while (count < 20)
printf("count is %d\n",count);
setvect(INTR, oldhandler);
return 0;
}
2. setverifyº¯Êý
setverifyº¯ÊýµÄ¹¦ÄÜÊÇÉèÖÃÑé֤״̬£¬ÆäÓ÷¨Îªvoid setverify(int value);³ÌÐòʵÀý´úÂëÈçÏ£º
#include <stdio.h>
#include <conio.h>
#include <dos.h>
int main(void)
{
int verify_flag;
printf("Enter 0 to set verify flag off\n");
printf("Enter 1 to set verify flag on\n");
verify_flag = getch() - 0;
setverify(verify_flag);
if (getverify())
printf("DOS verify flag is on\n");
else
printf("DOS verify flag is off\n");
return 0;
}
3. setviewportº¯Êý
setviewportº¯ÊýµÄ¹¦ÄÜÊÇΪͼÐÎÊä³öÉèÖõ±Ç°ÊÓ¿Ú, ÆäÓ÷¨Îª£ºvoid far setviewport(int left, int top, int right,int bottom, int clipflag);³ÌÐòʵÀý´úÂëÈçÏ£º
#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#define CLIP_ON 1&n
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1. registerbgidriverº¯Êý
registerbgidriverº¯ÊýµÄ¹¦ÄÜÊǵǼÒÑÁ¬½Ó½øÀ´µÄͼÐÎÇý¶¯³ÌÐò´úÂ룬ÆäÓ÷¨Îª£ºint registerbgidriver(void(*driver)(void ......
Ðí¶à±à³ÌÓïÑÔÖеĵ÷Óú¯ÊýµÄÁ½ÖÖ·½·¨Êǰ´Öµµ÷ÓÃ(call-by-value)ºÍ°´ÒýÓõ÷ÓÃ(call-by-reference)¡£
²ÎÊý°´Öµµ÷Óô«µÝʱ£¬Éú³É²ÎÊýÖµ¸±±¾²¢ÇÒ´«¸ø±»µ÷Óú¯Êý£¬¸±±¾µÄ¸Ä±ä²¢²»Ó°Ïìµ÷ÓÃÕßµÄÔʼ±äÁ¿Öµ£¬ÕâÑù¾Í¿ÉÒÔ·ÀÖ¹ÒâÍâµÄ¸±×÷ÓÃÓ°Ï쿪·¢ÕýÈ·£¬¿É¿¿µÄϵͳ¡£°´Öµµ÷ÓõÄÒ»¸öȱµãÊÇ£¬Èç¹û´«µÝ½Ï´óµÄÊý¾ÝÏÔò¸´ÖÆÕâ¸öÊý ......
#include <stdio.h>
int main()
{
char *str[] = {"welcome", "to", "fortemedia", "nanjing"};
char **p = str + 1;
str[0] = ( *p++ ) + 2;
str[1] = * ( p + 1 );
str[2] = p[1] + 3;
str[3] = p[0] + ( str[2] - str[1] );
printf ( "%s\n", str[0] );
printf ( ......
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1. settextstyleº¯Êý
settextstyleº¯ÊýµÄ¹¦ÄÜÊÇΪͼÐÎÊä³öÉèÖõ±Ç°µÄÎı¾ÊôÐÔ£¬ÆäÓ÷¨Îª£ºvoid far settextstyle (int font, int direction, char size);³ ......