Program:

    #include<iostream.h>
    #include<conio.h>
    #include<stdio.h> 

    class pers
    {
    public:
    char name[30],bloodg[10],dob[10]; 
    public:
    void get(void); 
    void show(void);
    };
    class pers1
    {
    public:
    char height[10],weight[10]; 
    public:
    void get1(void); 
    void show1(void);
    };
    class pers2 
    {
    public:
    long int ino;
    char add[20];
    public:
    void get2(void); 
    void show2(void);
    };
    class pers3 
    {
    public: 
    long int tno; 
    char dlno[20]; 
    public:
    void get3(void); 
    void show3(void);
    };
    void pers::get(void) 
    {
    cout<<"\n\n Enter the Name: "; 
    cin>>name;
    cout<<"\n\n Enter DOB: "; 
    cin>>dob;
    cout<<"\n\n Enter the Blood Group: "; 
    cin>>bloodg;
    }
    void pers::show(void) 
    {
    cout<<"\n\n Name: "<<name; 
    cout<<"\n\n Date of Birth: "<<dob; 
    cout<<"\n\n Blood Group: "<<bloodg; 
    }
    void pers1::get1(void) 
    {
    cout<<"\n\n Enter the Height: "; 
    cin>>height;
    cout<<"\n\n Enter Weight: "; 
    cin>>weight;
    }
    void pers1::show1(void) 
    {
    cout<<"\n\n Weight: "<<weight; 
    cout<<"\n\n Height: "<<height; 
    }
    void pers2::get2(void) 
    {
    cout<<"\n\n Enter the Insurance Number: 
    cin>>ino;
    cout<<"\n\n Enter Contact address: ";
    cin>>add;
    }
    void pers2::show2(void) 
    {
    cout<<"\n\n Insurance Number: "<<ino; 
    cout<<"\n\n Contact address: "<<add;
    }
    void pers3::get3(void) 
    {
    cout<<"\n\n Enter the Telephone number: "; 
    cin>>tno;
    cout<<"\n\n Enter driving licence number: "; 
    cin>>dlno;
    }
    void pers3::show3(void) 
    {
    cout<<"\n\n Telephone Number: "<<tno; 
    cout<<"\n\n Driving licence Number: "<<dlno;
    }
    void main() 
    {
    char a; 
    x:
    clrscr(); 
    pers p; 
    pers1 p1; 
    pers2 p2; 
    pers3 p3; 
    p.get(); 
    p1.get1(); 
    p2.get2(); 
    p3.get3();
    cout<<"\n\n\n\t Personal Information System"; 
    cout<<"\n\t ***************************"; 
    cout<<endl; 
    p.show(); 
    p1.show1(); 
    p2.show2(); 
    p3.show3();
    cout<<"\n\n Do u want to continue [y/n]"; 
    cin>>a;
    if(a=='y'||a=='Y')
    goto x; 
    getch(); 
    }