Wildcard Matching 萬用字元匹配

題目要求：

implement wildcard pattern matching with support for'?'and'*'.

'?' matches any single character.

'*' matches any sequence of characters (including the empty sequence).
the matching should cover the entire input string (not partial).
the function prototype should be:
bool ismatch(const char *s, const char *p)
some examples:
ismatch("aa","a") → false
ismatch("aa","aa") → true
ismatch("aaa","aa") → false
ismatch("aa", "*") → true
ismatch("aa", "a*") → true
ismatch("ab", "?*") → true
ismatch("aab", "c*a*b") → false

這個問題的主要難點在'*'的匹配上，需要回溯。因此我一開始想到了用遞迴來解決。

class solution 

else if(p[0] == '*')
if(*p == '*')  
if(star != nullptr) 
return false; //if not match return false
}while(*p == '*') p++; //skip continue star
return *p == '\0'; // successful match
}};

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