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List容器实现

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

int main()
{
    list<int> l1;
    l1.assign(1,13);
    cout << *l1.begin() << endl;
    cout <<l1.front() << endl;
    l1.assign(2,78);
    l1.insert(l1.end(),100);
    l1.push_back(781);
    l1.push_front(900);
    cout << l1.size()<< endl;
    list<int>::iterator i;
    for(i=l1.begin();i!=l1.end();i++){
        cout << *i << " ";
    }
    cout << endl;
    l1.reverse();
    for(i=l1.begin();i!=l1.end();i++){
        cout << *i << " ";
    }
    cout << endl;
    return 0;
}

#include <iostream>

using namespace std;
class Fun{
    int a;
public:
    Fun():a(0){};
    void set(int a);
    int Sun();
    int Porduct();
    void PrimeNumber();
};
void Fun::set(int a){
    this->a=a;
}
int Fun::Sun(){
    int sum=0;
    int n=a;
    while(n>=1){
        sum+=n;
        n--;
    }
    return sum;
}
int Fun::Porduct(){
    int Xun=1;
    int n=a;
    while(n>=1){
        Xun*=n;
        n--;
    }
    return Xun;
}
void Fun::PrimeNumber(){
    int n=a;
    while(n>1){
        if(n%2!=0){
            cout << n << '\t' ;
        }
        n--;
    }
    cout << endl;
}
int main()
{
    Fun s1;
    s1.set(5);
    cout << s1.Sun() << endl;
    cout << s1.Porduct() << endl;
    s1.PrimeNumber();
    return 0;
}