I cannot understand the errror codes

[jsmi2016]

I am doing a project that validates the date that is inputed. I have most of the project done. Accounting for leap year, the difference in length from month to month, and changing the month thats inputed as a number to the word for that month (ie i = january)
This is what I have:

#include <iostream>

using namespace std;

int main()
{
int month, day, year;

cout<< "Enter the numeric value for the month: ";
cin >> month;

cout << "Day: ";
cin >> day;

cout << "Year: ";
cin >> year;

void month::Output(ostream& outs)
{

switch (month)
{
case 1:
outs << "January";
break;
case 2:
outs << "February";
break;
case 3:
outs << "March";
break;
case 4:
outs << "April";
break;
case 5:
outs << "May";
break;
case 6:
outs << "June";
break;
case 7:
outs << "July";
break;
case 8:
outs << "August";
break;
case 9:
outs << "September";
break;
case 10:
outs << "Octuber";
break;
case 11:
outs << "November";
break;
case 12:
outs << "December";
break;
default:
outs << "The date is not valid." << endl;
}
if(year > 1582)
{
if ( month > 12 || month < 1 )
{
cout << "The date is not valid" << endl;
}
else
{
if((year % 400) || (year % 4))
{
if((day > 1) || (day <29))
{
cout << month << "," << day << year << "is a date in a leap year" << endl;
}
else
{
cout << month << "," << day << year << "is not a valid date" << endl;
}
}
else
{
if((month == 1) || (month == 3) || (month == 5) || (month == 7) || (month == 8) || (monnth == 10) || (month == 12))
{
if((day < 1) || (day > 31))
{
cout << month << "," << day << year << "is a date in a non-leap year." << endl;
}
}
else((month == 4) || (month == 6) || (month == 9) || (month == 11))
{
if((day < 1) || (day > 30))
{
cout << month << "," << day << year << "is a date in a non-leap year." << endl;
}
else
{
cout << "This date is not valid." << endl;
}
}
}
}
}
else
{
cout << "This date is not valid" << endl;
}

return 0;
}

These are the error codes I am receiving, and I cannot figure out why.

prog.cpp: In function ‘int main()’:
prog.cpp:18:6: error: ‘month’ is not a class or namespace
prog.cpp:19:1: error: a function-definition is not allowed here before ‘{’ token
prog.cpp:110:1: error: expected ‘}’ at end of input

Someone please help me??

Thanks!!!

[L1AkoG1T]

Next time, put your code in code tags like this: [code]<insert code here>[/code], as it makes the code much easier to read. Here are the problems:

1. In this line, else((month == 4) || (month == 6) || (month == 9) || (month == 11)), put an else if instead of else.

2. The integer "month" is spelled incorrectly in this line: if((month == 1) || (month == 3) || (month == 5) || (month == 7) || (month == 8) || (monnth == 10) || (month == 12))

3. You cannot declare a function in main(), as you did in this line: void month::Output(ostream& outs){, so delete it. Try reading http://cplusplus.com/doc/tutorial/functions/ for clarification on functions.

4. Inside the switch statement, you are using outs << instead of cout <<, so replace those.

After making these changes, your program should be up and running!