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/* constÏÞÖÆµÄ±äÁ¿µÄÖµÎÞ·¨ÐÞ¸Ä*/
#include <stdio.h>
int main(void)
{
const int a=1;
int const b=1;
a=1;
b=1;
system("pause");
return 0;

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/* constÏÞÖÆµÄ±äÁ¿ÎÞ·¨ÐÞ¸Ä*/
#include <stdio.h>
int main(void)
{
const int a=1;
switch(1)
{
case a:prinf("variable a can be used as constant");break;
default :printf("variable a cannot be used as constant");
}
system("pause");
return 0;
}

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/*cosntÔÚ*ǰ£¬Ö¸ÕëÖ¸Ïò¶ÔÏóµÄÖµÎÞ·¨ÐÞ¸Ä*/
#include <stdio.h>
int main(void)
{
int a=1,b=2;
const int * p1=&a;
int const * p2=&b;
*p1=1;
*p2=1;
system("pause");
return 0;
}

constÔÚÐǺÅǰ¶Ô¶ÔÖ¸Õë±äÁ¿½øÐÐÏÞÖÆÊ±ÊǶÔÖ¸Õë±äÁ¿ËùÖ¸ÏòµÄ¶ÔÏó½øÐÐÏÞÖÆ£¬Õë¶ÔÉÏÁдúÂë¾ÍÊǶÔa£¬b½øÐÐÏÞÖÆ£¬Ê¹a£¬b²»Äܱ»ÖØÐ¸³Öµ£¬Òò´Ë±àÒëʱ»á±¨´í£ºÔÚmianº¯ÊýÖÐÎÞ·¨ÐÞ¸ÄconstÏÞÖÆµÄ¶ÔÏó¡£µ«Á½¸öÖ¸Õë±äÁ¿µÄÖµÊÇ¿ÉÒÔÐ޸ĵġ£±àÒëÏÂÁдúÂ룺
 
/* cosntÔÚ*ǰ£¬Ö¸Õë±äÁ¿µÄÖµ¿ÉÒÔÐÞ¸Ä*/
#include <stdio.h>
int main(void)
{
int a=1,b=2;
const int * p1=&a;
int const * p2=&b;
printf ("a=%d\nb=%d\n",*p1,*p2);
p1=&b;
if(p1==p2)
printf("the address of p1 is equal to the address of p2\n");
system("pause");
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printf("hello world!");
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