C++编译构造函数的默认参数输出为一堆数字

Question

class Course
{
private:
    string cno;
    string cname;
    string ccollege;
    string cdepartment;
    int cxuefen;
    string coursetype;//基础数据
    string cteachername;//任课教师生成//动态生成
    string cbanhao;
    string cclass;
    int czxs;
    int czhouci;
    string time[2];
    int allcapacity;
    int sycapacity;
    int pcj;
    int qmcj;
    int zzcj;
    string see;//动态生成
    //vector<Xuanke> cxk;
    //int csno;//选课学生学号
    vector<string> csnov;//选课学生列表

    map<string,int>m;
public:
    Course(string a,string b,string c,string d,int e,string f,string g="无",string h="无",string i="无",int j=0,int k=0,string l="无",string m="无",int n=50,int o=50,int p=0,int q=0,int r=0,string s="是");
    Course(){}
    string getcno(){return cno;}
    void setcno(string a){cno=a;}
    string getcname(){return cname;}
    void setcname(string a){cname=a;}
    string getccollege(){return ccollege;}
    void setccollege(string a){ccollege=a;}
    string getcdepartment(){return cdepartment;}
    void setcdepartment(string a){cdepartment=a;}
    int getcxuefen(){return cxuefen;}
    void setcxuefen(int a){cxuefen=a;}
    string getcoursetype(){return coursetype;}
    void setcoursetype(string a){coursetype=a;}//
    string getcteacher(){return cteachername;}
    void setcteacher(string a){cteachername=a;}
    string getcbanhao(){return cbanhao;}
    void setcbanhao(string a){cbanhao=a;}
    string getcclass(){return cclass;}
    void setcclass(string a){cclass=a;}
    int getczxs(){return czxs;}
    void setczxs(int a){czxs=a;}
    int getczhouci(){return czhouci;}
    void setczhouci(int a){czhouci=a;}
    string gettime1(){return time[0];}
    void settime1(string a){time[0]=a;}
    string gettime2(){return time[1];}
    void settime2(string a){time[1]=a;}
    int getallcapacity(){return allcapacity;}
    void setallcapacity(int a){allcapacity=a;}
    int getsycapacity(){return sycapacity;}
    void setsycapacity(int a){sycapacity=a;}
    int getpcj(){return pcj;}
    void setpcj(int a){pcj=a;}
    int getqmcj(){return qmcj;}
    void setqmcj(int a){qmcj=a;}
    int getzzcj(){return zzcj;}
    void setzzcj(int a){zzcj=a;}
    string getsee(){return see;}
    void setsee(string a){see=a;}
    /*string getkehao(int a){return cxk[a].kehao;}
    string getbanhao(int a){return cxk[a].banhao;}
    string getteachername(int a){return cxk[a].teachername;}
    string gettime(int a){return cxk[a].time[2];}
    int getzhouci(int a){return cxk[a].zhouci;}
    int getqueren(int a){return cxk[a].queren;}*/
    friend ostream&operator<<(ostream &os,Course &c);
    friend istream&operator>>(istream &is,Course &c);
    void cadd(string a);
    void serase(int a);
};
Course::Course(string a,string b,string c,string d,int e,string f,string g,string h,string i,int j,int k,string l,string m,int n,int o,int p,int q,int r,string s):cno(a),cname(b),ccollege(c),cdepartment(d),cxuefen(e),coursetype(f)/*,cteachername(g),cbanhao(h),cclass(i),czxs(j),czhouci(k),time[0](l),time[1](m),allcapacity(n),sycapacity(o),pcj(p),qmcj(q),zzcj(r),see(s)*/
    {
        cteachername=g;
        cbanhao=h;
        cclass=i;
        czxs=j;
        czhouci=k;
        time[0]=l;
        time[1]=m;
        allcapacity=n;
        sycapacity=o;
        pcj=p;
        qmcj=q;
        zzcj=r;
        see=s;
    }
    /*
        cteachername(g),cbanhao(h),cclass(i),czxs(j),czhouci(),;time[0](l),time[1](m),allcapacity(n),sycapacity(o),pcj(p),qmcj(q),zzcj(r),see(s)

        cteachername=g;
        cbanhao=h;
        cclass=i;
        czxs=j;
        czhouci=k;
        time[0]=l;
        time[1]=m;
        allcapacity=n;
        sycapacity=o;
        pcj=p;
        qmcj=q;
        zzcj=r;
        see=s;*/
istream&operator>>(istream &is,Course &c)
{
    is>>c.cno>>c.cname>>c.ccollege>>c.cdepartment>>c.cxuefen>>c.coursetype;
    return is;
}
ostream&operator<<(ostream &os,Course &c)
{
    vector<string>::iterator it;
    os<<c.cno<<"\t"<<c.cname<<"\t"<<c.ccollege<<"\t"<<c.cdepartment<<"\t"<<c.cxuefen<<"\t"<<c.coursetype<<"\t";
    os<<c.cteachername<<"\t"<<c.cbanhao<<"\t"<<c.cclass<<"\t"<<c.czxs<<"\t"<<c.czhouci<<"\t"<<c.time[0]<<c.time[1]<<"\t"<<c.allcapacity<<"\t"<<c.sycapacity<<"\t"<<c.pcj<<"\t"<<c.qmcj<<"\t"<<c.zzcj<<"\t"<<c.see<<"\t";
    for(it=c.csnov.begin();it!=c.csnov.end();it++)
    {
        os<<*it;
    }
    return os;
}
void Course::cadd(string a)//学号
{
    csnov.push_back(a);
    m.insert(make_pair(a,csnov.size()-1));
}
/*void Course::serase(int a)//序号
{
    map<string,int>::iterator cit;
    vector<string>::iterator it=csnov.begin();
    for(cit=m.begin();cit!=m.end();cit++)
    {
        if(cit->second==a)
        {
            int index=cit->second;
            csnov.erase(it+index);
        }
    }
}*/
class Teachercaozuo
{
protected:
    //Teacher teacher;
    //vector<Xuanke2>txuanke;
    vector<Course>tcourse;
    //vector<Course>iterator::tcit;
    map<string,int>tccollege;
    map<string,int>tcdepartment;
    map<string,int>tcname;
public:
    Teachercaozuo(/*Teacher a*/)/*:teacher(a)*/{load();}

    void search1(string a);
    void search2(string a);
    void search3(string a);
    void reselect(string mingcheng,string banhao,string banji,string sj1,string sj2,int zc,/*string shi,*/int xs,string tname);
    void load();
    void save1();
    //void save2();
    ~Teachercaozuo(){save1();}
};
void Teachercaozuo::load()
{
    Course c;
    ifstream infile("2018211179-course.txt");
    if(!infile){cout<<0;};
    while(!infile.eof())
    {
        infile>>c;
        tcourse.push_back(c);
        tccollege.insert(make_pair(c.getccollege(),tcourse.size()-1));
        tcdepartment.insert(make_pair(c.getcdepartment(),tcourse.size()-1));
        tcname.insert(make_pair(c.getcname(),tcourse.size()-1));
    }
    infile.close();
}
void Teachercaozuo::save1()
{
    ofstream outfile;
    if(!outfile){cout<<2;}
    outfile.open("2018211179-course2.txt");
    vector<Course>::iterator it;
    for(it=tcourse.begin();it!=tcourse.end();it++)
    {
        outfile<<*it<<endl;
        cout<<*it;
    }
    outfile.close();
}
void Teachercaozuo::search1(string a)//学院
{
    map<string,int>::iterator it;
    it=tccollege.find(a);
    if(it==tccollege.end())
        return;
    else
    {
        cout<<tcourse[it->second]<<endl;
    }

}
void Teachercaozuo::search2(string a)//专业
{
    map<string,int>::iterator it;
    it=tcdepartment.find(a);
    if(it==tcdepartment.end())
        return ;
    else
    {
        cout<<tcourse[it->second]<<endl;
    }

}
void Teachercaozuo::search3(string a)//名字
{
    map<string,int>::iterator it;
    it=tcname.find(a);
    if(it==tcname.end())
        return ;
    else
    {
        cout<<tcourse[it->second]<<endl;
    }

}
void Teachercaozuo::reselect(string mingcheng,string banhao,string banji,string sj1,string sj2,int zc,/*string shi,*/int xs,string tname)
{
    string a,b,c,d,e,g;
    int f;
    map<string,int>::iterator it;
    it=tcname.find(mingcheng);
    if(it==tcname.end())
    {
        cout<<"输入选课名字没找到";
    }
    else
    {
        //cout<<tcourse[it->second]<<endl;//限制
        //a=tcourse[it->second].getcno();
        b=banhao;
        c=banji;
        d=sj1;
        e=sj2;
        f=zc;
        //g=shi;
        /*struct Xuanke2 xk2={a,b,c,{d,e},f,g};
        teacher.tadd(xk2);
        teacher.settnum(teacher.gettnum()+1);
        teacher.setzxs(xs);*/
        tcourse[it->second].setcteacher(tname);
        tcourse[it->second].setcbanhao(b);
        tcourse[it->second].setcclass(c);
        tcourse[it->second].setczxs(xs);
        tcourse[it->second].setczhouci(f);
        tcourse[it->second].settime1(d);
        tcourse[it->second].settime2(e);
        tcourse[it->second].setsycapacity(tcourse[it->second].getsycapacity()-1);
    }
}

就像这样 我course 类中构造函数的默认值（默认参数）编译输出后出现一堆数字 这是咋回事啊，用set函数修改一部分默认参数后到是正常了没出现数字

Answer 1

你调试下，应该是有些字段没有设值，还是默认值。