C语言函数—setverify

函数名

setvect

功 能

设置中断矢量入口

用 法

void setvect(int intr_num, void interrupt(*isr)());

程序例

/***NOTE

This is an interrupt service routine. You can NOT compile this program with Test Stack Overflow turned on and get an executable file which will operate correctly. */ #include <stdio.h> #include <dos.h> #include <conio.h> #define INTR 0X1C /* The clock tick interrupt */ void interrupt ( *oldhandler)(void); int count=0; void interrupt handler(void) { /* increase the global counter */ count++; /* call the old routine */ oldhandler(); } int main(void) { /* save the old interrupt vector */ oldhandler = getvect(INTR); /* install the new interrupt handler */ setvect(INTR, handler); /* loop until the counter exceeds 20 */ while (count < 20) printf("count is %dn",count); /* reset the old interrupt handler */ setvect(INTR, oldhandler); return 0; }
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