Regular Expression Matching

'.'

'*'

'.' Matches any single character.
'*' Matches zero or more of the preceding element.

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", "a*") → true
isMatch("aa", ".*") → true
isMatch("ab", ".*") → true
isMatch("aab", "c*a*b") → true

#include<iostream>
#include<vector>
#include<string>
using namespace std;

bool isMatch(const char *s, const char *p) {
if (*p=='\0')
return *s=='\0';
if (*(p+1)=='*')
{
while (*s==*p||(*s != '\0' && *p == '.'))
{
if (isMatch(s, p+2))
return true;
else
s++;
}
return isMatch(s, p+2);
}
else if(*s==*p||(*s != '\0' && *p == '.'))
return isMatch(s+1, p+1);
else
return false;
}