Problem with strcmp

[Yume]

The problem says that if we are given a text we have to post every sentence on a new row. And we know that the sentences are sepparated only with "." and "!".
For example:
"It's Easter. I've sent him a card."
output:
"It's Easter."
"I've sent him a card."

Here's my code:

#include <iostream>
#include <string>
using namespace std;
int main ()
{
	char s[100], *a=".", *b="!";
	int n, i;
	cout << "s= "; cin.get(s, 100);
	n=strlen(s);
	for (i=1; i<n; i++)
	{
		if ((strcmp(a,s[i])==0)||(strcmp(b,s[i])==0))
			cout << endl;
		else
			cout << s[i];
	}
}

The problem is at 12th row. The compiler says "invalid conversion from `char' to `const char*'". And i don't know how to change that. Any help? It would be better if you could modify that row. Any tip will be appreciated! Thank you!

[vlad from moscow]

The problem in that statement

if ((strcmp(a,s[i])==0)||(strcmp(b,s[i])==0))

is that you are trying to compare the character array pointed by 'b' with a single character s[i].

And in general you incorrectly realize your task. Instaed of pointers 'a' and 'b' and function strcmp I think you should use function strtok of define two single characters '.' and '!' and use it in a searching operation.

[chipp]

char s[100], *a=".", *b="!";

you should use char:
char a = '.', b= '!';

[Yume]

I used the strtok function and it worked now. Thank you!