字符串的规范使用（二）

键值对（”key = valude”）字符串，在开发中经常使用；

要求1：请自己定义一个接口，实现根据key获取valude；40分

要求2：编写测试用例。30分

              要求3：键值对中间可能有n多空格，请去除空格30分

注意：键值对字符串格式可能如下：

 “key1 = valude1”

“key2 =       valude2         

“key3  = valude3”

“key4        = valude4”

“key5   =   “

“key6   =“

“key7   =   “

 

int getKeyByValude(char *keyvaluebuf,  char *keybuf,  char *valuebuf);

/***
keyandvalue.c
***/
#include<stdio.h>
#include<string.h>int trimSpace(char *in,char *out)
{int iRet = -1;int i = 0;int j = 0;int k = 0;char *tempIn = in;if(in == NULL || out == NULL){printf("NULL is error\n");return iRet;}i = 0;j = strlen(tempIn) - 1;while(isspace(tempIn[i]) && tempIn[i] != '\0'){i++;}while(isspace(tempIn[j]) && tempIn[j] != '\0'){j--;}while(i <= j){out[k++] = tempIn[i++];}out[k] = '\0';iRet = 0;return iRet;
}int getValuebyKey(const char *keyandvalue, const char *key, char *value)
{int iRet = -1;char *str = keyandvalue;if(keyandvalue == NULL || key == NULL || value == NULL){printf("Point is NULL \n");return iRet;}str = strstr(keyandvalue,key);if(str == NULL){printf("strstr err \n");return iRet;}str = str + strlen(key);str = strstr(str,"=");if(NULL == str){printf("strstr(str,\"=\") error\n");return iRet;}str = str + strlen("=");iRet = trimSpace(str,value);if(iRet != 0){printf("trimSpace error\n");return iRet;}return iRet;
}int main()
{int iRet = 0;char *key = "key";char *keyvalue = "key =   value   ";char value[256];int len = 0;iRet = getValuebyKey(keyvalue,key,value);printf("value = %s\n",value);return 0;}