http://www.jackxiang.com/index.php zh-cn http://www.jackxiang.com/post// jack <xdy108@126.com> Mon, 10 May 2021 01:49:14 +0000 http://www.jackxiang.com/post// https://mp.weixin.qq.com/s/YqZI4XUlsyPpaGIjy0pG3A
#cat p.c
#include <stdio.h> void (*fun)(int a); void function(int value) {   printf("value= %d\r\n",value); } int main(void) { fun = function;//把function赋值给fun fun(520);//fun就等同于function      while(1) { } }

#./p
value= 520

cat pp.c
#include <stdio.h> int res; //void (*fun)(int a); int (*fun)(int a); int function(int value) {   return value; } int main(void) { fun = function;//把function赋值给fun res = fun(520);//fun就等同于function    printf("res = %d",res);   while(1) { } }
#./pp


cat ppp.c
#include <stdio.h> char temp[3]={1,2,3}; char *p; int main(void) {   p=temp;//将数组名赋值给指针变量p，p就指向数组temp的首地址      printf("value0 = %d\r\n",*p);    //p就代表数组的第一个数据的地址   printf("value1 = %d\r\n",*(p+1));//p+1就代表数组的第二个数据的地址   printf("value2 = %d\r\n",*(p+2));//p+2就代表数组的第三个数据的地址      printf("temp[0] = %d\r\n",p[0]);//p[0]等同于temp[0]   printf("temp[1] = %d\r\n",p[1]);//p[1]等同于temp[1]   printf("temp[2] = %d\r\n",p[2]);//p[2]等同于temp[2]   while(1) { } }
#./ppp
value0 = 1
value1 = 2
value2 = 3
temp[0] = 1
temp[1] = 2
temp[2] = 3

以前的学习：
https://jackxiang.com/post/7485/ ]]> http://www.jackxiang.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.jackxiang.com/post//#blogcomment