#include<stdio.h>
int f(int *p){
    p = p+1;
    return printf("%d\n",*p);
}
void main(){
    int a[]={1,2};
    int *p = a;//指針p是首地址
    f(p);//調(diào)用
    printf("%d",*p);//p的值是不會(huì)改變的
}

#include<stdio.h>
void z(int *p){
    p = p+1;
    *p = 100;
}
void mian(){
    int a[] = {1,2};
    int *p = a;
    z(p);//調(diào)用
    printf("a[1]=%d",*(p+1));//指針（p+1）所指向的內(nèi)存空間中的值改變了
}

#include<stdio.h>
void exchange(int **x,int **y){
    int *temp;
    temp = *x;//*x=*qq=&a
    *x = *y;
    *y = temp;
}

void main(){
    int a =100;
    int b = 12;
//定義指針
    int *q = &a;
    int *p = &b;
    int **qq = &q;
    int **pp = &p;
//輸出
    printf("q=%p\n",q);
    printf("p=%p\n",p);
    //調(diào)用函數(shù)，進(jìn)行轉(zhuǎn)換
    exchange(qq,pp);

    printf("========改變以后的==========\n");
    printf("q=%p\n",q);
    printf("p=%p\n",p);
}