修改下列代码中的错误： #include <iostream> using namespace std; int main () {int n; cin<<n<<endl;; if(n==1){cout<<"hero is idleling..."<<endl; cout<<"hero is attack..."<<endl; cout<<"hero is runing..."<<endl; cout<<"hero is dead..."<<endl;} else{cout<<"Monster is idleling..."<<endl; cout<<"Monster is attack..."<<endl; cout<<"Monster is runing..."<<endl; cout<<"Monster is dead..."<<endl;} }

代码中的错误有：

1. `cin` 语句中应该使用 `>>` 而不是 `<<`。

2. 第三行代码中多了一个分号 `;`。

3. `if` 语句中缺少左大括号 `{`。

4. `else` 语句中缺少左大括号 `{`。

下面是修改后的代码：

#include <iostream> 
using namespace std;  

int main () {
    int n;  
    cin >> n;  

    if(n == 1) {
        cout << "hero is idleling..." << endl;  
        cout << "hero is attack..." << endl;  
        cout << "hero is runing..." << endl;  
        cout << "hero is dead..." << endl;  
    } 
    else {
        cout << "Monster is idleling..." << endl;  
        cout << "Monster is attack..." << endl;  
        cout << "Monster is runing..." << endl;  
        cout << "Monster is dead..." << endl;  
    }    
}