#include 
     
      //数组名做参数,会改变数组本身的值void printA(int a[],int n){    printf("%d\n", sizeof(a));//4 传入的是首地址    for (int i = 0; i < n; ++i) {        printf("%d ",a[i]);    }    printf("\n");}void printB(int b[3][4]){    for (int i = 0; i < 3; ++i) {        for (int j = 0; j < 4; ++j) {            printf("%d   ",a[i][j]);        }    }    printf("\n");}//指针做参数，会改变数组本身的值void printAP(int *p, int n){    printf("%d\n", sizeof(p));  //4 传入的是首地址    int *pLength =p+n;    for (; p