头文件：
#pragma once
class man
{
public:
    int age;
    double length;
    string name;
    string selfInFo;
    string StudyBackground;
    string career;
    string GRdemand;

    int GRage1;
    int GRage2;
    double GRlength;
   
   
    void EntreInFo();
    void ShowInFo();
    void GRInFo();
    void GRInFo(int GRage1,int GRage2);
    void GRInFo(double GRlength);
    void GRInFo(string GRothreInFo);

    man(void);
    ~man(void);
};


#pragma once
class woman
{
public:
    int age;
    double length;
    string name;
    string selfInFo;
    string StudyBackground;
    string career;
    string BYdemand;

    int BYage1;
    int BYage2;
    double BYlength;
   
   
    void EntreInFo();
    void ShowInFo();
    void BYInFo();
    void BYInFo(int BYage1,int BYage2);
    void BYInFo(double BYlength);
    void BYInFo(string BYothreInFo);
    woman(void);
    ~woman(void);
};

#pragma once
#include"man.h"
#include"woman.h"
const int num=100;
class LOVESYS
{
public:
    int select;
    string sex;
    int mannum;
    int womannum;
    man manlist[num];
    woman womanlist[num];
     
    int  startsys();
    void allnewman();
    void allnewwoman();
    void allmanInFo();
    void allwomanInFo();
    LOVESYS(void);
    ~LOVESYS(void);
};


源文件：
#include "StdAfx.h"
#include "man.h"


man::man(void)
{  
    int age=0;
    double length=0;
    string name="无";
    string selfInFo="无";
    string StudyBackground="无";
    string career="无";
    string GRdemand="无";

    double GRlength=0;
    int GRage1=0;
    int GRage2=0;
}


man::~man(void)
{
}
void man::EntreInFo(){
    cout<<"请输入您的姓名：";
    cin>>this->name;
    cout<<"请输入您的年龄：";
    cin>>this->age;
    cout<<"请输入您的身高：";
    cin>>this->length;
    cout<<"请输入您的学历：";
    cin>>this->StudyBackground;
    cout<<"请输入您的职业 ：";
    cin>>this->career;
    cout<<"请输入您的自我性格及爱好描述：";
    cin>>this->selfInFo;
    cout<<"请输入您对另一半的要求：";
    cout<<"1)女生身高不能低于(没有要求填0)：";
    cin>>this->GRlength;
    cout<<"2)女生年龄区间(没有要求填0)：";
    cin>>this->GRage1>>this->GRage2;
    cout<<"3)您对女生还有其他的要求吗？如果没有请输入“无”：";
    cin>>this->GRdemand;
    cout<<"=====我们会很快将您的信息公布，祝您早日找到您心仪的一半！=====";

}
void man::ShowInFo(){
    cout<<"--->这是一位男士的基本信息<---"<<endl;
    cout<<"姓名：";
    cin>>this->name;
    cout<<"年龄：";
    cin>>this->age;
    cout<<"身高：";
    cin>>this->length;
    cout<<"学历：";
    cin>>this->StudyBackground;
    cout<<"职业 ：";
    cin>>this->career;
    cout<<"自我性格及爱好描述：";
    cin>>this->selfInFo;
    cout<<"对另一半的要求：";
    GRInFo(this->GRage1, this->GRage2 );
    GRInFo(this->GRlength);
    GRInFo( this->GRdemand);
    cout<<"=========================";
}
void man::GRInFo(int GFages,int GFagess ){
    if(GFages<=0||GFagess<=0){
    cout<<"我对女生年龄没有要求！";
    }else{
        cout<<"我对女生的身年龄区间要求是："<<GFages<<"--"<<GFagess;
    }
}
void man::GRInFo(double length){
    if(length<=0){
    cout<<"我对女生的身高没有要求！";
    }else{
    cout<<"我对女生的身高要求不能低于"<<length;
    }
}
void man::GRInFo(string GRdemand){
    cout<<GRdemand;
}

#include "StdAfx.h"
#include "woman.h"


woman::woman(void)
{
    int age=0;
    double length=0;
    string name="无";
    string selfInFo="无";
    string StudyBackground="无";
    string career="无";
    string GRdenamd="无";

    int BYage1=0;
    int BYage2=0;
    double BYlength=0;
}


woman::~woman(void)
{
}
void woman::EntreInFo(){
    cout<<"请输入您的姓名：";
    cin>>this->name;
    cout<<"请输入您的年龄：";
    cin>>this->age;
    cout<<"请输入您的身高：";
    cin>>this->length;
    cout<<"请输入您的学历：";
    cin>>this->StudyBackground;
    cout<<"请输入您的职业 ：";
    cin>>this->career;
    cout<<"请输入您的自我性格及爱好描述：";
    cin>>this->selfInFo;
    cout<<"请输入您对另一半的要求：";
    cout<<"1)男生身高不能低于(没有要求填0)：";
    cin>>this->BYlength;
    cout<<"2)男生年龄区间(没有要求填0)：";
    cin>>this->BYage1>>this->BYage2;
    cout<<"3)您对男生还有其他的要求吗？如果没有请输入“无”：";
    cin>>this->BYdemand;
    cout<<"=====我们会很快将您的信息公布，祝您早日找到您心仪的一半！=====";

}
void woman::ShowInFo(){
    cout<<"--->这是一位女士的基本信息<---"<<endl;
    cout<<"姓名：";
    cin>>this->name;
    cout<<"年龄：";
    cin>>this->age;
    cout<<"身高：";
    cin>>this->length;
    cout<<"学历：";
    cin>>this->StudyBackground;
    cout<<"职业 ：";
    cin>>this->career;
    cout<<"自我性格及爱好描述：";
    cin>>this->selfInFo;
    cout<<"对另一半的要求：";
    BYInFo(this->BYage1, this->BYage2 );
    BYInFo(this->BYlength);
    BYInFo(this->BYdemand);
   
   
    cout<<"=========================";
}
void woman::BYInFo(int GFages,int GFagess ){
    if(GFages<=0||GFagess<=0){
    cout<<"我对男生年龄没有要求！";
    }else{
        cout<<"我对男生的身年龄区间要求是："<<GFages<<"--"<<GFagess;
    }
}
void woman::BYInFo(double length){
    if(length<=0){
    cout<<"我对男生的身高没有要求！";
    }else{
    cout<<"我对男生的身高要求不能低于"<<length;
    }
}
void woman::BYInFo(string BYdemand){
    cout<<BYdemand;
}

#include "StdAfx.h"
#include "LOVESYS.h"


LOVESYS::LOVESYS(void){
   
    cout<<"====================欢迎使用非诚勿扰相亲系统============================";
    cout<<"=====================技术支持来自安徽工程大学软件开发小组=======================";
   
    int select=0;
    string sex="无";
    int mannum=0;
    int womannum=0;
   
}


void  LOVESYS::allnewman(){
    man n;
    n.EntreInFo();
    manlist[mannum]=n;
    mannum++;
        

}
void LOVESYS::allnewwoman(){

    woman w;
    w.EntreInFo();
    womanlist[womannum]=w;
    womannum++;

}
void LOVESYS::allmanInFo(){

    for(int i=0;i<mannum;i++){
    manlist[i].ShowInFo();
    }

}
void LOVESYS::allwomanInFo(){
    for(int i=0;i<womannum;i++){
    womanlist[i].ShowInFo();
    }

}

LOVESYS::~LOVESYS(void)
{
}
int  LOVESYS::startsys(){
   
    while(1){
        man n;
        woman w;
        cout<<"请选择（1、新建相亲 2、相亲查询 3、退出)";
        cin>>this->select;
         
    if(this->select==1){
    cout<<"请输入您的性别：";
    cin>>this->sex;
    if(sex=="男"){
          n.EntreInFo();
        }else if(sex=="女"){
          w.EntreInFo();
        }else{
        cout<<"您的操作有误！请重新输入！";
            
        }
        
}else if(this->select==2){
        cout<<"大家好";

        this->allmanInFo();
        this->allwomanInFo();
        
        }else if(this->select==3)
        {
            cout<<"感谢您的使用，我们将会竭诚为您服务！"<<endl;
                   return 0;
        }else{
        cout<<"您的操作有误！请重新输入！";
        
        }
   
   

}
}

#include "stdafx.h"
#include"LOVESYS.h"
#include "man.h"
#include"woman.h"

int _tmain(int argc, _TCHAR* argv[])
{
    LOVESYS sys;
    sys.startsys();
    return 0;
}

问题已经解决。犯得都是低级错误