23. 实现 func()函数，在func()中,通过操作arr,实现修改str1到str2字符串,并打印所有字符串，考察对指针与数组与字符串的基本掌握

//已知下面几个数组
    char str1[] = "arr1";
    char str2[] = "aarr2";
    char str3[] = "aaarr3";
    char str4[] = "aaaarr4";
    char str5[] = "aaaaarr5";
    char str6[] = "aaaaaarr6";



    char* a[][3] = {str1,str2,str3,
                    str4,str5,str6};
    char* b[][3] = {"aaaa1","bbbb","cccccc","ddddd","eee","fffff"};

    char* c[][3] = {"cc","cc","cc"};
//现要求
//1.自己定义一个名为arr的数组，用来存储 a,b,c三个数组的地址当其元素成员。
//2.实现一个func()函数，此函数通过操作arr,来修改str1-str6的可修改字符串,均修改为"tt..t",并打印所有字符串(共15个小字符串)。

 答案：

#include <stdio.h>
//2.
void func(char*(**p)[3],int arrLen,int aLen,int bLen,int cLen)
{
    int i;//控制数组arr
    int jRow,jCol;//控制数组a,b,c
    int k;//控制str1-str6
//通过p修改str1-str2 为t..tt
    i = 0;
    for(jRow = 0;jRow < aLen;jRow++)
    {
        for(jCol = 0;jCol < 3;jCol++)
        {
            for(k = 0;*(*(*(*(p+i)+jRow)+jCol)+k);k++)
            {
                *(*(*(*(p+i)+jRow)+jCol)+k) = 't';
            }
        }
    }
//打印所有字符串
    int len[3] = {aLen,bLen,cLen};

    for(i = 0;i < arrLen;i++)
    {
        for(jRow = 0;jRow<len[i];jRow++)
        {
            for(jCol = 0;jCol <3;jCol++)//*(*(p+i)+jRow)+jCol
            {
                 printf("%s ", *(*(*(p+i)+jRow)+jCol));
            }
        }
        putchar(10);
    }
}


int main(void)
{

    char str1[] = "arr1";
    char str2[] = "aarr2";
    char str3[] = "aaarr3";
    char str4[] = "aaaarr4";
    char str5[] = "aaaaarr5";
    char str6[] = "aaaaaarr6";



    char* a[][3] = {str1,str2,str3,
                    str4,str5,str6};
    char* b[][3] = {"b1","bb2","bbb3","bbbb4","bbbbb5","bbbbbb6","bbbbbbb7","bbbbbbbb8","bbbbbbbbb9"};

    char* c[][3] = {"c","cc","ccc"};

    //1.自己定义一个数组arr,以及指向arr数组的指针。

    //推导过程：char* a[][3] -> char* (*p)[3] = a; ->char* (*arr[])[3]
    char* (*arr[])[3] = {a,b,c};

    //定义一个指向arr数组的指针的推导方式1：char* a[][3]
    //->char*(*p)[3] = a;
    //->char*(**p)[3] = &a;
    //->char*(**p)[3] = arr;
    //定义一个指向arr数组的指针的推导方式2：
    //char* (*arr[])[3] ->
    //直接将arr[]替换为*p ->char* (*(*p))[3];
    //char* (*(*p))[3] = arr;//用来定义func()的形参。



    func(arr, sizeof(arr)/sizeof(*arr), sizeof(a)/sizeof(*a), sizeof(b)/sizeof(*b), sizeof(c)/sizeof(*c));

    return 0;
}