C字符串查找

1.有一个字符串”1a2b3d4z”,；
要求写一个函数实现如下功能，
功能1：把偶数位字符挑选出来，组成一个字符串1。valude；20分
功能2：把奇数位字符挑选出来，组成一个字符串2，valude 20
功能3：把字符串1和字符串2，通过函数参数，传送给main，并打印。
功能4：主函数能测试通过。
int getStr1Str2(char *souce, char *buf1, char *buf2);

int getStr1Str2(char *souce, char *buf1, char *buf2){    int ret = 0;    char *src = souce;    if(souce == NULL || buf1 == NULL || buf2 ==NULL){        ret = -1;        printf("%s is error!(source == NULL || buf1 == NULL || buf2 ==NULL)\n",__FUNCTION__);        return ret;    }    while(*src != '\0'){        *buf1 = *src;        src++;        buf1++;        *buf2 = *src;        src++;        buf2++;    }    return ret;}int main(void){    char src[1024]="1a2b3c4d";    char buf1[512]={0};    char buf2[512]={0};    int ret = 0;    ret = getStr1Str2(src,buf1,buf2);    if(ret != 0){        printf("getStr1Str2 failed!ret : %d\n",ret);        return ret;    }    printf("src:%s\n",src);    printf("偶数位的数据buf2:%s\n",buf2);    printf("奇数位的数据buf1:%s\n",buf1);    printf("\nHello World!\n");    return 0;}

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);

int trimeSpace(char *src,char *new_str){    int ret = 0;    char *tmp_p = src;    int head = 0,tail=0;    if(src == NULL || new_str == NULL)    {        ret = -1;        printf("%s is error!(src == NULL || count == NULL)\n",__FUNCTION__);        return ret;    }    tail = strlen(src)-1;    while(tmp_p[head] != '\0' && isspace(tmp_p[head])){        head++;    }    while(tmp_p[tail] != '\0' && isspace(tmp_p[tail])){        tail--;    }    strncpy(new_str,tmp_p+head,tail-head+1);    new_str[tail-head+1] = '\0';    return ret;}int getKeyByValude(char *keyvaluebuf,  char *keybuf,  char *valuebuf){    int ret = 0;    char * p = keyvaluebuf;//辅助指针变量初始化    if(keyvaluebuf == NULL || keybuf == NULL || valuebuf ==NULL){        ret = -1;         printf("%s is error!(keyvaluebuf == NULL || keybuf == NULL || valuebuf ==NULL)\n",__FUNCTION__);        return ret;    }    //1. 从母串中查找子串    p = strstr(p,keybuf);    if(p == NULL){        ret = -1;        return ret;    }    p += strlen(keybuf);//辅助指针变量再次初始化使得下一次可用    //2. 判断有没有等号    p = strstr(p,"=");    if(p == NULL){        ret = -1;        return ret;    }    p += strlen("=");//辅助指针变量再次初始化使得下一次可用，指向等号后面开始的地方    //3. 去除等号后面的空格    ret = trimeSpace(p,valuebuf);//调用自己封装的函数    if(ret != 0){        printf("getKeyByValude failed \n");        return ret;    }    return ret;}int main(void){   char *keyandvalue = "key2 =         value2   ";   char *key = "key2";   char res_str[1024]={0};    int ret = 0;    ret = getKeyByValude(keyandvalue,key,res_str);    if(ret != 0){        printf("getKeyByValude failed!ret : %d\n",ret);        return ret;    }    printf("res_str:%s\n",res_str);    printf("\nHello World!\n");    return 0;}