定义一个函数,输入两个字符串,从第一个字符串中删除在第二个中出现过的所偶字符串。例如从第一个字符串"We are students."中删除第二个字符中“auiou”中出现过的字符得到的结果是"W r stdnts"
解题思路:利用哈希查找。
- #include <stdio.h>
-
- void deleteStr2FromStr1(char* str1, char* str2)
- {
- if(str1 == NULL || str2 == NULL || *str1=='\0' || *str2 == '\0')
- return;
-
- int hash[256];
- for(int i=0; i<256; ++i)
- hash[i] = 0;
-
- char* p = str2;
- while(*p != '\0')
- hash[*p++]++;
-
- char* strFront = str1;
- int len = strlen(str1);
- int small = -1;
- for(int i=0; i<len; ++i)
- {
- if(hash[*(strFront+i)] == 0)
- str1[++small] = *(strFront + i);
- }
-
- str1[++small] = '\0';
- }
-
- int main()
- {
-
- char str1[] = "We are students";
- char str2[] = "aeiou";
- deleteStr2FromStr1(str1, str2);
-
- printf("%s",str1);
-
- return 0;
- }