c++进制没有改变什么情况

#include<iostream>
#include<climits>
#include<cmath>
int main()
{
    using namespace std;
    int ch=42;
    int wa=0x42;
    int in=042;
    cout<<"ch= "<<ch<<endl;
    cout<<"wa= "<<ch<<"\n";
    cout<<"in= "<<ch<<endl;
    cout<<"chest= "<<ch<<endl;
    cout<<hex;
    cout<<"wa= "<<wa<<endl;
    cout<<oct;
    cout<<"in= "<<in<<endl;
    return 0;
}

为什么我的结果是这样？    不应该是区分8,16进制的吗？为66,34吗？
ch= 42
wa= 42
in= 42
chest= 42
wa= 42
in= 42
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