C++ Begginer - errors

[forta2k]

#include <iostream>
int main()
{
int a;
int b;
int c;
int d;
cin>>a>>b;
c=a+b ; d=a*b;
if(a%2==0) std::cout<<c<<d;
else cout<<d<<c
}

I got a lot of errors. Can anyone fix it and explain it to me?

[LA48b7Xj]

Write std:: in front of cout and cin and put a ; on the last statement.

[MMVYouTube]

Instead of writing std:: all the time, write "using namespace std;" before int main().

[shadder]

also in the second last line you forgot to add a semi-colon

[domcho]

I think you have to write
return 0;
at the end of main()

[shadder]

Also using code tags will help you for your future posts
http://www.cplusplus.com/articles/jEywvCM9/

[LA48b7Xj]

I think you have to write
return 0;
at the end of main()

main implicitly returns 0 at the end of the function.

[forta2k]

Thank you all.
I fixed it, no compilation errors, but when I open it and type values for a and b a random result appears and the executable stops. What to do?

[SakurasouBusters]

#include <iostream>
int main()
{
int a;
int b;
int c;
int d;
cin>>a>>b;
c=a+b ; d=a*b;
if(a%2==0) std::cout<<c<<d;
else cout<<d<<c
}

Should be :

#include <iostream>

using namespace std;
int main()
{
    int a, b, c, d;
    cin >> a >> b;

    c = a + b; d = a * b;
    if(a % 2 == 0) 
    cout << c << " " << d; else 
    cout << d << " " << c;

    cin.get();
    return 0;
}