《C和指针》6.18.1匹配字符

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于 2017-06-03 17:02:50 发布

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分类专栏：编程基础文章标签：字符串匹配

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#include <stdio.h>
char *find_char(char const*source, char const *chars)
{
	char *p_chars;
	if (source == NULL || chars == NULL || source == "" || chars == "")
		return NULL;
	for (; *source != '\0'; source++)
	{
		for (p_chars = (char *)chars; *p_chars != '\0'; p_chars++)
		{
			if (*p_chars == *source)
				return (char *)source;
		}
	}
	return NULL;
	
}
int main()
{
	char *source = "ABCDEF";
	char *chars = "XRCQEF";
	char *ret_char = find_char(source, chars);
	printf("%c\n",*ret_char);
	return 0;
}