1 /************************************************************************* 2     > File Name: 33_FirstNotRepeatChar.c 3     > Author: Juntaran 4     > Mail: JuntaranMail@gmail.com 5     > Created Time: 2016年09月02日 星期五 13时43分20秒 6  ************************************************************************/ 7  8 #include <stdio.h> 9 10 char FirstNotRepeatChar(char* str)11 {12     if (str == NULL)13         return ‘\0‘;14     int HashSize = 256;15     int hash[HashSize] = {0};16     17     char* key = str;18     while (*key != ‘\0‘)19     {20         printf("*key = %d\n", *key);21         hash[*key] ++;22         *key ++;23     }24     25     key = str;26     while (*key != ‘\0‘)27     {28         printf("%d ", hash[*key]);29         if (hash[*key] == 1)30             return *key;31         key ++;32     }33     return ‘\0‘;34 }35 36 int main()37 {38     char str[] = "adaccbweff";39     char ret = FirstNotRepeatChar(str);40     printf("%c\n", ret);41 }