Anonymní profil petod – Programujte.com

vytvořil jsem si primitivní c++ program ale nede mi zkompilovat. 

zde je zdroják

 // ConsoleApplication3.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"
#include <iostream>
using namespace std;
int strany(int a);

int main()
{
int a;
cout<< "tenhle program"
  << "vypocita"
  << "obvod"
  << "ctverce"
  <<  endl;
cin>> a;

return 0;
{

int strany(int a);
{
int a=4*a;

return 4*a;     
{

překladač mi háže tyhle chyby                    Error 1 error C1075: end of file found before the left brace '{' at 'c:\users\doma\documents\visual studio 2012\projects\application1\consoleapplication3\consoleapplication3\consoleapplication3.cpp(28)' was matched c:\users\doma\documents\visual studio 2012\projects\application1\consoleapplication3\consoleapplication3\consoleapplication3.cpp 31 1 ConsoleApplication3

Error 1 error C1075: end of file found before the left brace '{' at 'c:\users\doma\documents\visual studio 2012\projects\application1\consoleapplication3\consoleapplication3\consoleapplication3.cpp(28)' was matched c:\users\doma\documents\visual studio 2012\projects\application1\consoleapplication3\consoleapplication3\consoleapplication3.cpp 31 1 ConsoleApplication3