Declaration With no Type error

// Filename: microblog.h
// Purpose: The header file for a class to store a single tweet
#include <fstream>
#include <string>
#include "tweet.h"
using namespace std;

class MicroBlog
// Constructors and Destructors
MicroBlog(); // default constructor
MircoBlog (const string Date, const string Hashtag, const string Contents)const; // non-default constructor
MicroBlog (const MicroBlog &OtherMicroBlog);
~MicroBlog(); // destructor
static const int MAX_TWEETS = 100;
Tweet blog[MAX_TWEETS];
int num_tweets;

When I try to compile I get the error:
ISO C++ forbids declaration of ‘MircoBlog’ with no type [-fpermissive]

What is causing this error?
please no errr whats it called? i can never remember. double posting. asked and answered here: .
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