案例代碼

#include<stdio.h>
#include<stdlib.h> 
#include<string.h>
int main()
{//字符指針char *pstr="good dog ww";printf("字符指針指向的字符串內容:%s\n",pstr);printf("字符指針本身的地址:%p\n",&pstr);printf("字符指針指向的地址:%p\n",pstr);printf("字符串常量的地址:%p\n","good dog ww");printf("字符串的首個字符內容:%c\n",*pstr);printf("======================================\n");//字符數組char c[]="hello";printf("字符數組內容:%s\n",c);printf("字符數組地址:%p\n",c);printf("字符數組地址:%p\n",&c);printf("hello字符串常量的地址:%p\n","hello");printf("..........................\n");char *s="abcstring";printf("s的內容:%s\n",s);printf("s本身的地址:%p\n",&s);printf("s指向的地址:%p\n",s);printf("abcstring字符串常量的地址:%p\n","abcstring");printf("...........................\n");s="hello";printf("s的內容:%s\n",s);printf("s本身的地址:%p\n",&s);printf("s指向的地址:%p\n",s);printf("======================================\n");//整型指針int a=1;printf("a的值:%d\n",a);printf("a的地址:%p\n",&a);printf("...........................\n");int* b=&a;printf("b的地址:%p\n",&b);printf("b指向的地址:%p\n",b);printf("b指向的內容:%d\n",*b);getchar();return 0;}

輸出:
字符指針指向的字符串內容:good dog ww
字符指針本身的地址:0057FA7C
字符指針指向的地址:00EB5938
字符串常量的地址:00EB5938
字符串的首個字符內容:g
======================================
字符數組內容:hello
字符數組地址:0057FA6C
字符數組地址:0057FA6C
hello字符串常量的地址:00EB5888
..........................
s的內容:abcstring
s本身的地址:0057FA60
s指向的地址:00EB5810
abcstring字符串常量的地址:00EB5810
...........................
s的內容:hello
s本身的地址:0057FA60
s指向的地址:00EB5888
======================================
a的值:1
a的地址:0057FA54
...........................
b的地址:0057FA48
b指向的地址:0057FA54
b指向的內容:1*
/

在函數中使用指針

#include<stdio.h>
#include<string.h>
//整型指針
int search(int *arr,int len,int find)
{int i;for(i=0;i<len;i++){if(find==arr[i]){return i;}}return -1;
}//字符指針
char* increase(char* c)
{int i;for(i=0;i<strlen(c);i++){c[i]=c[i]+1;}return c;
}
int main()
{int arr[]={1,2,3};int len=sizeof(arr)/sizeof(int);printf("結果為:%d\n",search(arr,len,3));char c[]="ABCDEF";printf("%s\n",c);increase(c);printf("%s\n",c);getchar();return 0;
}