#include <iostream>
using namespace std;
 
 
 
int count_x(char* p, char x)
 
     // count the number of occurrences of x in p[]
 
     // p is assumed to point to a zero-terminated array of char (or to nothing)
 
{
 
   //  if (p==nullptr) return 0;
 
     int count = 0;
 
     for (;p!=nullptr; ++p)
 
           if (*p==x)
 
                 ++count;
 
     return count;
 
}
 
 
int main() {
	// your code goes here
 
 
	char* str = "Good morning!";
	char c = 'o';
 
	std::cout << count_x(str, c) << std::endl;
 
	return 0;
}

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