C++ error : 'does not name a type error '

Question

When runs this program ,compiler gives a error saying that "varA(in class C)does not name a type".what's the wrong with me?explain plz.

#include <iostream>
using namespace std;

class A{
private:
    int PrvA1;
public:
     A(){PrvA1=0;}
    void SetPrvA1(int x){PrvA1=x;}
    int show(){return PrvA1;}
};

class C{
    A varA;
    varA.SetPrvA1(20);
    public:
    void show(){
            cout<<varA.show()<<endl;
    }

};

int main(){
    A a1;
    C c1;
    a1.SetPrvA1(30);
    cout<<a1.show()<<endl;
    c1.show();
}

Answer 1

You can't initialize directly in the class without method(or constructor) ,change in to

class C{
    A varA;
    
    public:
    C(){ varA.SetPrvA1(20);}
    void show(){
            cout<<varA.show()<<endl;
    }

};