goto,END

#define  _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

//有一个字符串符合以下特征（”abcdef,acccd,eeee,aaaa,e3eeeee,sssss,";）

//分清楚赋值指针变量 和 操作逻辑之间的关系
char ** spitString3(const char *buf1, char c, int *count)
{
char *p=NULL, *pTmp = NULL;
int	tmpcount = 0;
char **myp = NULL;

//1 p和ptmp初始化
p = buf1;
pTmp = buf1;

//第一遍求出count
do
{
//2 检索符合条件的位置 p后移  形成差值 挖字符串
p = strchr(p, c);
if (p != NULL)
{
if (p-pTmp > 0)
{
tmpcount ++;
//3重新 让p和ptmp达到下一次检索的条件
pTmp = p = p + 1;
}
}
else
{
break;
}
} while (*p!='\0');

*count = tmpcount;

//根据多少行 精确的分配内存
myp = (char **)malloc(tmpcount * sizeof(char *) );
if (myp == NULL)
{
return NULL;
}

//////////////////////////////////////////////////////////////////////////

tmpcount = 0;
//1 p和ptmp初始化
p = buf1;
pTmp = buf1;

do
{
//2 检索符合条件的位置 p后移  形成差值 挖字符串
p = strchr(p, c);
if (p != NULL)
{
if (p-pTmp > 0)
{
int len = p - pTmp + 1;
myp[tmpcount] = (char *)malloc(len * sizeof(char));
if (myp[tmpcount] == NULL)
{
return NULL;
}
strncpy(myp[tmpcount], pTmp,  p-pTmp);
myp[tmpcount][p-pTmp]  = '\0';  //把第一行数据变成 C风格字符串
tmpcount ++;
//3重新 让p和ptmp达到下一次检索的条件
pTmp = p = p + 1;
}
}
else
{
break;
}
} while (*p!='\0');

//*count = tmpcount;
return myp;
}

void FreeMem2(char **myp, int count)
{
int i =0;
if (myp == NULL)
{
return;
}
for (i=0; i<count; i++)
{
if (myp[i] != NULL)
{
free(myp[i]);
}
}
if (myp != NULL)
{
free(myp);
}
}

void FreeMem3(char ***p, int count)
{
int i =0;
char **myp = NULL;
if (p == NULL)
{
return;
}
myp = *p;

if (myp == NULL)
{
return ;
}

for (i=0; i<count; i++)
{
if (myp[i] != NULL)
{
free(myp[i]);
}
}
if (myp != NULL)
{
free(myp);
}
*p = NULL; //把实参二级指针 ，修改成NULL
}

//分清楚赋值指针变量 和 操作逻辑之间的关系
int  spitString4(const char *buf1, char c, char ***myp3, int *count)
{
int ret = 0;
char *p=NULL, *pTmp = NULL;
int	tmpcount = 0;
char **myp = NULL;

//1 p和ptmp初始化
p = buf1;
pTmp = buf1;

//第一遍求出count
do
{
//2 检索符合条件的位置 p后移  形成差值 挖字符串
p = strchr(p, c);
if (p != NULL)
{
if (p-pTmp > 0)
{
tmpcount ++;
//3重新 让p和ptmp达到下一次检索的条件
pTmp = p = p + 1;
}
}
else
{
break;
}
} while (*p!='\0');

*count = tmpcount;

//根据多少行 精确的分配内存
myp = (char **)malloc(tmpcount * sizeof(char *) );
if (myp == NULL)
{
ret = -1;
printf("func spitString4() err:%d  (tmpcount * sizeof(char *) )", ret);
goto END;
//return -1;
}
memset(myp, 0, tmpcount * sizeof(char *));

//////////////////////////////////////////////////////////////////////////

tmpcount = 0;
//1 p和ptmp初始化
p = buf1;
pTmp = buf1;

do
{
//2 检索符合条件的位置 p后移  形成差值 挖字符串
p = strchr(p, c);
if (p != NULL)
{
if (p-pTmp > 0)
{
int len = p - pTmp + 1;
myp[tmpcount] = (char *)malloc(len * sizeof(char));
if (myp[tmpcount] == NULL)
{
ret = -2;
printf("func spitString4() err:%d  malloc(len * sizeof(char) )", ret);
goto END;
}
strncpy(myp[tmpcount], pTmp,  p-pTmp);
myp[tmpcount][p-pTmp]  = '\0';  //把第一行数据变成 C风格字符串
tmpcount ++;
//3重新 让p和ptmp达到下一次检索的条件
pTmp = p = p + 1;
}
}
else
{
break;
}
} while (*p!='\0');

END:
if (ret != 0) //失败
{
//FreeMem2(NULL, *count );
//myp= NULL;
FreeMem3(&myp, *count);
}
else
{
*myp3 = myp;  //成功
}
return ret;
}

//多级指针 避免野指针
void main93()
{
int ret = 0, i = 0;
char *p1 = "abcdef,acccd,";
char cTem= ',';
int nCount;

char **p = NULL;  //char buf[10][30]

p= spitString3(p1, cTem, &nCount);
if (p == NULL)
{
printf("fucn spitString() err: %d \n", ret);
return ret;
}

for (i=0; i<nCount; i++ )
{
printf("%s \n", p[i]);
}

//释放内存
for (i=0; i<nCount; i++)
{
free(p[i]);
}
free(p);

printf("hello...\n");
system("pause");
return ;
}

void main()
{
int ret = 0, i = 0;
char *p1 = "abcdef,acccd,";
char cTem= ',';
int nCount;

char **p = NULL;  //char buf[10][30]

ret = spitString4(p1, cTem, &p,  &nCount);
if (ret != 0)
{
printf("fucn spitString() err: %d \n", ret);
return ret;
}

for (i=0; i<nCount; i++ )
{
printf("%s \n", p[i]);
}

//释放内存
for (i=0; i<nCount; i++)
{
free(p[i]);
}
free(p);

printf("hello...\n");
system("pause");
return ;
}

//作业1 用第三种内存模型求解问题
/*
int spitString2(const char *buf1, char c, char ***pp, int *count)
{

}

char ** spitString3(const char *buf1, char c, int *count)
{

}
*/