方案一

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>/*
有一个字符串符合以下特征（“abcdef,acccd,eeee,aaaa,e3eeee,ssss,”）
写两个函数(API)，输出以下结果
第一个API
1)以逗号分隔字符串，形成二维数组，并把结果传出
2)把二维数组行数运算结果也传出
第二个API
1)以逗号分隔字符串，形成一个二级指针。
2)把一共拆分多少行字符串个数传出
要求：
1, 能正确表达功能的要求，定义出接口。
2, 正确实现接口和功能.
3, 编写正确的测试用例.
*/int spitString(char *str, char ch, char array[][30], int *count)
{char *p = str;char *q = p;int temp_count = 0;int len = 0;if (str == NULL || array == NULL || count == NULL) {fprintf(stderr, "str == NULL || array == NULL || count == NULL\n");return -1;}//在一个字符串中 找到一个字符  找到了 返回第一个字符的地址， 失败返回NULL//strchr(母串， 字符)while ((p = strchr(p, ch)) != NULL) {//找到了strncpy(array[temp_count], q, p - q);array[temp_count][p - q] = '\0';temp_count++;p++;q = p;if (*p == '\0') {break;}}if (*q != '\0') {len = (str + strlen(str)) - q;strncpy(array[temp_count], q, len);array[temp_count][len] = '\0';temp_count++;}*count = temp_count;return 0;
}int main(void)
{char *str = "abcdef,acccd,eeee,aaaa,e3eeee,ssss,";char array[10][30];int count = 0;int retn = 0;int i = 0;retn = spitString(str, ',', array, &count);if (retn < 0) {fprintf(stderr, "spitString er\n");return -1;}for (i = 0; i < count; i++) {printf("array[%d]:%s\n", i, array[i]);}return 0;
}

方案二

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>void free_mem(char ***array_p, int count)
{char **array = *array_p;int i = 0;if (array_p == NULL) {return;}void free(void*);if (array != NULL) {for (i = 0; i < count; i++) {if (array[i] != NULL) {free(array[i]);array[i] = NULL;}}free(array);*array_p = NULL;}
}int spitString(char *str, char ch, char ***array_p, int *count)
{char * p = str;char * q = p;int temp_count = 0;char **array = NULL;int str_len = 0;int retn = 0;if (str == NULL || array_p == NULL || count == NULL) {fprintf(stderr, " (str == NULL || array_p == NULL || count == NULL)\n");return -1;}//1 求出 字符串中 拆分的个数while ((p = strchr(p, ch)) != NULL) {temp_count++;p++;q = p;if (*q == '\0') {break;}}if (*q != '\0') {temp_count++;}//此时temp_count 就是 子字符串的个数//2 根据个数开辟指针数组 在堆上array = (char**)malloc(sizeof(char*)* temp_count);if (array == NULL) {fprintf(stderr, "malloc  char **array error\n");retn = -1;goto END;}memset(array, 0, sizeof(char*)*temp_count);//3 拆分字符串， 为每一个指针开辟堆空间 拷贝字符串p = str;q = p;temp_count = 0;while ((p = strchr(p, ch)) != NULL) {//找到了str_len = p - q;array[temp_count] = (char*)malloc(sizeof(char)* (str_len+1));if (array[temp_count] == NULL) {fprintf(stderr, "malloc array[%d] error\n", temp_count);retn = -1;goto END;}strncpy(array[temp_count], q, str_len);array[temp_count][str_len] = '\0';temp_count++;p++;q = p;if (*p == '\0') {break;}}if (*q != '\0') {str_len = (str + strlen(str)) - q;array[temp_count] = (char*)malloc(sizeof(char)*(str_len + 1));if (array[temp_count] == NULL) {fprintf(stderr, "malloc array[%d] error\n", temp_count);retn = -1;goto END;}strncpy(array[temp_count], q, str_len);array[temp_count][str_len] = '\0';temp_count++;}if (array != NULL) {*array_p = array;*count = temp_count;}//释放内存的步骤
END:if (retn != 0) {//已经出现错误了free_mem(&array, temp_count);}return 0;
}int main(void)
{char *str = "abcdef,acccd,eeee,aaaa,e3eeee,ssss,";char **array = NULL;int count = 0;int retn = 0;int i = 0;retn = spitString(str, ',', &array, &count);for (i = 0; i < count; i++) {printf("array[%d]: %s\n", i, array[i]);}free_mem(&array, count);if (array == NULL) {printf("array kong\n");}return 0;
}

方案三

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>char** mySpitString( char* buf1, char c, int* count)
{char* p = NULL;char* pTmp = NULL;int tmpcount = 0;char** myp = NULL;p = buf1;pTmp = buf1;// 第一次求出countdo {p = strchr(p, c);if (p != NULL){if ( p - pTmp > 0 ){tmpcount++;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;p = buf1;pTmp = buf1;do{p = strchr(p, c);if (p != NULL){//检索符合条件的位置p后移， 形成差值，挖字符串if (p - pTmp > 0){int len = p - pTmp +1;//分配‘\0’的空间myp[tmpcount] = (char*)malloc(len*sizeof(char));if (myp[tmpcount]== NULL) {return NULL;}strncpy(myp[tmpcount], pTmp, p - pTmp);myp[tmpcount][p - pTmp] = '\0'; //把一行数据变成c风格的字符串//让p  ptmp达到下一次检索条件pTmp = p = p + 1;tmpcount++;}}else{break;}} while (*p != '\0');*count = tmpcount;return myp;
}int main(void)
{char *str = "abcdef,acccd,eeee,aaaa,e3eeee,ssss,";int ret = 0, k = 0;char cTem = ',';int nCount = 0;char** p = NULL;p = mySpitString(str, cTem, &nCount);if (p == NULL){printf("error:%d\n", ret);return ret;}for (size_t i = 0; i < nCount; i++){printf("%s\n", p[i]);}//free roomfor (size_t i = 0; i < nCount; i++){free(p[i]);}free(p);system("pause");return 0;}

方案四

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>char** mySpitString( char* buf1, char c, int* count)
{char* p = NULL;char* pTmp = NULL;int tmpcount = 0;char** myp = NULL;p = buf1;pTmp = buf1;// 第一次求出countdo {p = strchr(p, c);if (p != NULL){if ( p - pTmp > 0 ){tmpcount++;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;p = buf1;pTmp = buf1;do{p = strchr(p, c);if (p != NULL){//检索符合条件的位置p后移， 形成差值，挖字符串if (p - pTmp > 0){int len = p - pTmp +1;//分配‘\0’的空间myp[tmpcount] = (char*)malloc(len*sizeof(char));if (myp[tmpcount]== NULL) {return NULL;}strncpy(myp[tmpcount], pTmp, p - pTmp);myp[tmpcount][p - pTmp] = '\0'; //把一行数据变成c风格的字符串//让p  ptmp达到下一次检索条件pTmp = p = p + 1;tmpcount++;}}else{break;}} while (*p != '\0');*count = tmpcount;return myp;
}
void FreeRoomP(char*** p, int count)
{int i = 0;char** myp = NULL;if (p == NULL){return;}myp = *p;if(myp == NULL){return;}for (; i < count; i++){if (myp[i] != NULL){free(myp[i]);}}if (myp != NULL){free(myp);}*p = NULL; //把实参二级指针，修改为NULL
}void FreeRoom(char** myp, int count)
{int i = 0;if (myp == NULL){return ;}for (; i < count; i++){if (myp[i] != NULL){free(myp[i]);}}if (myp != NULL){free(myp);}}char mySpitStr(char* buf1, char c, char*** myp3, int* count)
{char* p = NULL;char* pTmp = NULL;int tmpcount = 0;char** myp = NULL;int ret = 0;p = buf1;pTmp = buf1;// 第一次求出countdo{p = strchr(p, c);if (p != NULL){if (p - pTmp > 0){tmpcount++;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){//如果这儿出错已分配 的内存要释放 ret = -2;printf("here error myp**malloc(tmpcount*sizeof(char*))\n");goto END;//return -2;}memset(myp, 0, tmpcount*sizeof(char*));tmpcount = 0;p = buf1;pTmp = buf1;do{p = strchr(p, c);if (p != NULL){//检索符合条件的位置p后移， 形成差值，挖字符串if (p - pTmp > 0){int len = p - pTmp + 1;//分配‘\0’的空间myp[tmpcount] = (char*)malloc(len*sizeof(char));if (myp[tmpcount] == NULL){//如果这儿出错已分配 的内存要释放 ret = -2;printf("here error  (char*)malloc(len*sizeof(char)\n");goto END;//return -1;}strncpy(myp[tmpcount], pTmp, p - pTmp);myp[tmpcount][p - pTmp] = '\0'; //把一行数据变成c风格的字符串//让p  ptmp达到下一次检索条件pTmp = p = p + 1;tmpcount++;}}else{break;}} while (*p != '\0');END:if (ret !=0){//free room, 只要一个就可以了，其它可以注释了//free1FreeRoom(myp, *count);//free2FreeRoomP(&myp, *count);//free3int i = 0;if (myp == NULL){return -3;}for (; i < tmpcount; i++){if (myp[i] != NULL){free(myp[i]);}}if (myp != NULL){free(myp);}}else{*myp3 = myp; //suceess*count = tmpcount;}return ret;
}int main(void)
{char *str = "abcdef,acccd,eeee,aaaa,e3eeee,ssss,";int ret = 0, k = 0;char cTem = ',';int nCount = 0;char** p = NULL;//p = mySpitString(str, cTem, &nCount);//if (p == NULL)//{//  printf("error:%d\n", ret);//  return ret;//}//ormySpitStr(str, cTem, &p, &nCount);//采用三级指针for (size_t i = 0; i < nCount; i++){printf("%s\n", p[i]);}//free roomfor (size_t i = 0; i < nCount; i++){free(p[i]);}free(p);system("pause");return 0;}

五方案

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>#define IN
#define OUTvoid free_mem(char ***array_p, int num) // char ****array = &p
{char **array = *array_p;int i = 0;if (array_p == NULL) {return;}if (array == NULL) {return;}for (i = 0; i < num; i++) {if (array[i] != NULL) {free(array[i]);array[i] = NULL;}}free(array);*array_p = NULL;
}int sort(IN char *array_1[], int num1,IN char(*array_2)[30], int num2,OUT char ***array_3_p, OUT int *num3_p)
{char **p= NULL;int num3 = 0;int retn = 0;int i = 0;int j = 0;int len = 0;char *temp_p = NULL;if (array_1 == NULL || array_2 == NULL || array_3_p == NULL || num3_p == NULL) {fprintf(stderr, "array_1 == NULL || array_2 == NULL || array_3_p == NULL || num3 == NULL\n");return -1;}num3 = num1 + num2; //这个是p3指针所需要第一次开辟的 指针的个数p = (char**)malloc(sizeof(char*)*num3);if (p == NULL) {fprintf(stderr, "malloc char**p3 error\n");retn = -1;goto END;}memset(p, 0, sizeof(char*)*num3);//array_1 copy p中for (i = 0; i < num1; i++) {len = strlen(array_1[i]);p[i] = (char*)malloc(sizeof(char)* (len + 1));memset(p[i], 0, sizeof(char)*(len + 1));strcpy(p[i], array_1[i]);}//array_2 copy p中for (j = 0; j < num2; j++, i++) {len = strlen(array_2[j]);p[i] = (char*)malloc(sizeof(char)*(len + 1));memset(p[i], 0, sizeof(char)*(len + 1));strcpy(p[i], array_2[j]);}for (i = 0; i < num3; i++) {printf("p[%d]:%s\n", i, p[i]);}//对 p 排序for (i = 0; i < num3; i++) {for (j = i; j < num3; j++) {if (strcmp(p[i], p[j]) > 0) {temp_p = p[i];p[i] = p[j];p[j] = temp_p;}}}printf("----\n");for (i = 0; i < num3; i++) {printf("p[%d]:%s\n", i, p[i]);}*array_3_p = p;*num3_p = num3;END:if (retn != 0) {free_mem(&p, num3);}return 0;
}int main(void)
{int ret = 0;char *p1[] = { "aa", "cccccc", "bbbbb" };char buf2[10][30] = { "111111", "3333", "2222" };char **p3 = NULL;int len1, len2,len3, i = 0;len1 = sizeof(p1) / sizeof(*p1);len2 = 3;sort(p1, len1, buf2, len2, &p3, &len3);free_mem(&p3, len3);if (p3 == NULL) {printf("free p3 succ\n");}return 0;
}

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字符串分隔为二维数组，二级和三级指针的应用案例

方案一

方案二

方案三

方案四

五方案

字符串分隔为二维数组，二级和三级指针的应用案例相关推荐

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