类中int数组为什么不能正确访问？该怎么解决

类中int数组为什么不能正确访问？

C/C++ code

#include <string>
#include <iostream>
using namespace std;

class student{
    private:
        string name;
        int score[3];
        int sum;
    public:
        student(int s[], string  name= "");
        student(const student& s);
        ~student(){ /*delete score;*/ };

        int* getScore() const;
        int getSum() const;
        string getName() const;

        student& operator=(const student& s);
        bool operator==(const student& s);
        bool operator<(const student&  s);
};

student::student( int sc[], string n):name(n),sum(0){
    for(int i=0; i<3; i++){
        score[i] = sc[i];
        sum += sc[i];
    }

}

int* student::getScore() const{
    int sc[3] = {0};
    for(int i=0; i<3; i++)
        sc[i] = this->score[i];
    return sc;
}

void main(){
    int sc2[3] = {10,20,30};
    student s2(sc2, "赵");

int* temp; 
temp = s2.getScore();
for(int i=0; i<3; i++){
    cout << "****************s2.score[" << i << "]= " << temp[i] <<endl;
}

}

结果为什么是：

****************s2.score[0]= 10
****************s2.score[1]= -858993460
****************s2.score[2]= 4201565
Press any key to continue

------解决方案--------------------
int* student::getScore() const{
int sc[3] = {0};
for(int i=0; i<3; i++)
sc[i] = this->score[i];
return sc;
}

这样不行吧，sc是一个局部变量，函数返回时，内存地址被释放
------解决方案--------------------

C/C++ code


#include <string>
#include <iostream>
using namespace std;

class student{
private:
    string name;
    int score[3];
    int sum;
public:
    student(int s[], string  name= "");
    student(const student& s);
    ~student(){ /*delete score;*/ };

    const int* getScore() const;
    int getSum() const;
    string getName() const;

    student& operator=(const student& s);
    bool operator==(const student& s);
    bool operator<(const student&  s);
};

student::student( int sc[], string n):name(n),sum(0){
    for(int i=0; i<3; i++){
        score[i] = sc[i];
        sum += sc[i];
    }

}

const int* student::getScore() const{
    return score;
}

int main(){
    int sc2[3] = {10,20,30};
    student s2(sc2, "赵");

    const int* temp;
    temp = s2.getScore();
    for(int i=0; i<3; i++){
        cout << "****************s2.score[" << i << "]= " << temp[i] <<endl;
    }

    return 0;
}

类中int数组为什么不能正确访问？该怎么解决

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