运行结果显示错误？请问该怎么修改？

Question

#include <iostream>
using namespace std;
int main()
{
int a;
wchar_t a[100];
ab:cout<<"输入"<<endl;
scanf("%d",&a);
if (a==1)
cout<<"Good!"<<endl;
if (a==2)
cout<<"Bad!"<<endl;
else
cout<<"Sorry, I don't know!"<<endl;
cout<<endl;
goto ab;
return 0;
}

Answer 1

int a;wchar_t a[100]; // 变量名a跟前面的int a重名了