C + + Base instance-struct type (3)

struct

#if 0#include<iostream>using namespace Std;main () {//define struct type struct books {char title[20];    Char author[15];    int pages;    float price;        } ;     Declare struct variable struct books zbk={"VC + +", "Xc", 295,35.5};      Books WBK;    The output of the structure variable cout<< "ZBK:" <<endl;    Cout<<zbk.title <<endl;    cout<<zbk.author<<endl;    cout<<zbk.pages<<endl;    cout<<zbk.price<<endl;    cout<< "--------------------" <<endl;    zbk.pages+=10 the operation of structure members;    zbk.price+=0.5;    cout<< "zbk.pages=" <<Zbk.pages<<endl;    cout<< "Zbk.price=" <<Zbk.price<<endl;    cout<< "--------------------" <<endl;    The input and output of the structure variable cout<< "wbk.title =";    cin>>wbk.title;    cout<< "wbk.author=";    cin>>wbk.author;    cout<< "wbk.pages=";    cin>>wbk.pages;    cout<< "wbk.price=";    cin>>wbk.price;    cout<< "WBK:" <<endl;Cout<<wbk.title <<endl;    cout<<wbk.author<<endl;    cout<<wbk.pages<<endl;    cout<<wbk.price<<endl;    cout<< "--------------------" <<endl;    Mutual assignment of structural variables books temp;    TEMP=WBK;    cout<< "Temp:" <<endl;    cout<<temp.title<<endl;    cout<<temp.author<<endl;    cout<<temp.pages<<endl; Cout<<temp.price<<endl;} #endif

struct array

#if 0#include<iostream>using namespace Std;main () {int i;           Define struct type struct student {int num;           Char name[10];           float maths;           float physics;           float chemistry;    Double total;     };     Declaration Structure Array St student st[3];     Enter a value for the structure array from the keyboard cout<< "num name Maths physics chemistry" <<endl;        for (i=0;i<3;i++) {cout<<i+1<< "";        cin>>st[i].num;        cin>>st[i].name;        cin>>st[i].maths;        cin>>st[i].physics;     cin>>st[i].chemistry;    }//Calculates the total of each student for (i=0;i<3;i++) st[i].total=st[i].maths+st[i].physics+st[i].chemistry;        Outputs the values of the elements of the structure array for (i=0;i<3;i++) {cout<< "st[" <<i<< "]:";        cout<<st[i].num<< ' \ t ';        cout<<st[i].name<< ' \ t ';        cout<<st[i].maths<< ' \ t ';        cout<<st[i].physics<< ' \ t '; Cout<<st[i].chemistry<< ' \ t ';     cout<<st[i].total<<endl; }} #endif

struct pointer

#if 0/* Structure pointer */#include <iostream>using namespace Std;main () {//define struct type struct human {char name[10];       int sex;    int age;    };    Declare struct variables and struct pointer variables, and initialize the struct human x={"Xiech", 1,21},*p=null;    struct pointer variable points to object p=&x;    Displays the value of the structure variable cout<< "x.name=" <<x.name<<endl;    cout<< "x.sex=" <<x.sex<<endl;      cout<< "X.age=" <<x.age<<endl;    Use the structure pointer to display the data cout<< "(*p) in the structure object. Name=" << (*p) .name<<endl;    cout<< "(*p). sex=" << (*p) .sex<<endl;    cout<< "(*p). age=" << (*p) .age<<endl;    cout<< "P->name=" <<p->name<<endl;    cout<< "p->sex=" <<p->sex<<endl;    cout<< "P->age=" <<p->age<<endl;    Enter data cout<< "name:" For the structure object through the structure pointer;    Cin>> (*p). Name;    cout<< "Sex:";    Cin>> (*p). sex;    cout<< "Age:";    Cin>> (*p). Age; Displays the value of the structure variable cout<< "x.name=" <<x.name<<endl;    cout<< "x.sex=" <<x.sex<<endl; cout<< "x.age=" &LT;&LT;X.AGE&LT;&LT;ENDL;} #endif

Memory allocation

#if 0#include<iostream>using namespace Std;main () {//define struct type struct human {char name[10];       int sex;       int age;    };     declares struct variables and struct pointers, and initializes the struct human x={"Xiech",1,21},*p=&x;    Use the structure pointer to display data cout<< "(*p) in the structure. Name=" << (*p) .name<<endl;    cout<< "(*p). sex=" << (*p) .sex<<endl;    cout<< "(*p). age=" << (*p) .age<<endl;    cout<< "-------------------------" <<endl;    Using the new operator to allocate memory for P p=new human;    Assigns a value cout<< "p->name=" to the structure object that the P points to on the keyboard;    cin>>p->name;    cout<< "p->sex=";    cin>>p->sex;    cout<< "p->age=";    cin>>p->age;    cout<< "-------------------------" <<endl;    Displays the value of the structure object referred to by P cout<< "P->name=" <<p->name<<endl;    cout<< "p->sex=" <<p->sex<<endl;    cout<< "P->age=" <<p->age<<endl;    cout<< "-------------------------" <<endl; Display the value of a structure variable   cout<< "X.name=" <<x.name<<endl;    cout<< "x.sex=" <<x.sex<<endl;    cout<< "X.age=" <<x.age<<endl;  Releases the memory that P points to delete p; } #endif

Array of structures

#if 0#include<iostream>using namespace Std;main () {    //define struct type    struct human {       char name[10];       int sex;       int age;    };    Declares the structure array and the struct pointer variable, and initializes the    human x[]={{"weiping", 1,30},{"Lihua", 1,25},{"Liumin", 0,23}},*p=null;    Use the subscript variable for the output structure of the array element for    (int i=0;i<3;i++)    {        cout<<x[i].name<< ' \ t ';        cout<<x[i].sex<< ' \ t ';        cout<<x[i].age<<endl;    }    cout<< "----------------" <<endl;    The structure pointer is used to output the elements of the structure array for    (P=x;p<=&x[2];p + +)    {        cout<<p->name<< ' \ t ';        cout<<p->sex<< ' \ t ';        cout<<p->age<<endl;    }} #endif

struct-Body pointer

#if 0/* struct pointer */#include <iostream>using namespace Std;main () {//defines a struct type that contains pointer members struct test {char *str;    int *ip;    }x;    Use integer pointer ip x.ip=new int in struct variable x;    Allocate 1 units * (X.IP) = 100;    cout<< "X.ip:" <<x.ip<< ' \ t ' <<* (X.IP) <<endl;    cout<< "---------------" <<endl;    Delete X.ip;    X.ip=new Int[5];    Allocate 5 units for (int i=0;i<5;i++) * (x.ip+i) =100+i;    cout<< "X.ip:" <<endl;    for (i=0;i<5;i++) cout<<x.ip+i<< ' \ t ' << (* (x.ip+i)) <<endl;    Delete X.ip;    cout<< "---------------" <<endl;    Use the character-type pointer in structure variable x str x.str=new char (' A ');    Allocate 1 units cout<< "X.STR:" << (*X.STR) <<endl;    cout<< "---------------" <<endl;    Delete x.str;    X.str=new Char[5];    Assigning multiple units *x.str= ' s ';    * (x.str+1) = ' W ';    * (x.str+2) = ' x ';    * (x.str+3) = ' C ';    * (x.str+4) = ' + ';    cout<< "X.STR:" <<x.str<<endl;    Delete x.str; cout<< "---------------" <<endl;    Initialize Test y={"Very good!" when declaring a struct variable, NULL};    cout<< "Y.STR:" <<y.str<<endl; cout<< "Y.ip:" &LT;&LT;Y.IP&LT;&LT;ENDL;} #endif

Structure embedding

#if 0/* Structure Embedding */#include <iostream>using namespace Std;main () {//define date struct struct Date {int year;       int month;    int day;    };        Defines baby struct struct baby {int num;        float weight;   Date birthday;     Date is a struct type};    Declares a baby struct variable and initializes baby b1={10001,10,{2011,06,16}};    The following is a reference to the baby struct variable B1.    cout<< "b1.num=" <<b1.num<<endl;    cout<< "b1.weight=" <<b1.weight<<endl;    cout<< "B1.birthday.year=" <<b1.birthday.year<<endl;    cout<< "B1.birthday.month=" <<b1.birthday.month<<endl;    cout<< "b1.birthday.day=" <<b1.birthday.day<<endl;    cout<< "--------------------------" <<endl;    Declares the baby structure variable temp, and assigns the Operation baby Temp;    TEMP=B1;    cout<< "temp.num=" <<temp.num<<endl;    cout<< "temp.weight=" <<temp.weight<<endl;    cout<< "Temp.birthday.year=" <<temp.birthday.year<<endl; cout<< "Temp.birthday.month= "<<temp.birthday.month<<endl; cout<< "temp.birthday.day=" &LT;&LT;TEMP.BIRTHDAY.DAY&LT;&LT;ENDL;} #endif

Recursive

#if 0/* recursion */#include <iostream>using namespace Std;main () {    //define a recursive struct named list      struct list {          char         NAME[10];          int          sex;          int age          ;          List         *next;   The member next is a pointer to its own structure    };    Use recursive structure variables    list l1={"Xiech", 1,35.5,null};    cout<< "L1:" <<endl;    cout<< "Name\t" <<L1.name<<endl;    cout<< "sex\t" <<L1.sex<<endl;    cout<< "Age\t" <<L1.age<<endl;    cout<< "next\t" <<L1.NEXT<<ENDL;} #endif

Linked lists and structural bodies

#if 0/* linked list and struct */#include <iostream>using namespace Std;main () {int i;           Defines a recursive struct student {char name[10] named student;           int math;           int computer;           float sum;    Student *next;    The next member is a pointer to the structure of itself};      Declare 3 structure pointer variable struct student *head,*tail,*temp with student;    Apply for the 1th piece of data and set the initial value of each structure pointer temp=new struct student;   Request Memory Head=temp;    Head pointer tail=head;    Tail pointer//loop for linked list input data cout<< "\tname Math Computer" <<endl; for (I=1;;        i++) {cout<<i<< "\ t";        cin>>temp->name;            if (temp->name[0]!= ' * ') {cin>>temp->math>>temp->computer;            temp->sum=temp->math+temp->computer;            temp->next=null;      Tail=temp;            Set the chain footer pointer} else {//The following is the input end processing Delete temp;            tail->next=null;         Break }//apply for memory te for the next studentmp->next=new struct student;    temp=temp->next;    Causes the processing pointer temp to point to the new memory block}//To print the linked list data from beginning to end cout<< "--------------------" <<endl;    Temp=head;           while (temp!=null) {cout<<temp->name<< "," <<temp->math<< ",";           cout<<temp->computer<< "," <<temp->sum<<endl;     temp=temp->next; }} #endif

struct recursion

#if 0/* Structure recursion */#include <iostream>using namespace Std;main () {int i;           Defines a recursive struct student {char name[10] named student;           int math;           int computer;           float sum;    Student *forw;    FORW member is the former pointer student *next;    Next member is the back pointer};    Declare 3 structure pointer variable struct student *head,*tail,*temp with student;    Apply for the 1th piece of data and set the initial value of each structure pointer temp=new struct student;      Request Memory Head=temp;      Head pointer tail=head;    Tail pointer head->forw=null;    Loop record input data for linked list cout<< "\tname Math Computer" <<endl; for (I=1;;        i++) {cout<<i<< "\ t";        cin>>temp->name;            if (temp->name[0]!= ' * ') {cin>>temp->math>>temp->computer;            temp->sum=temp->math+temp->computer;            temp->next=null;      Tail=temp;            Set the chain footer pointer} else {//The following is the input end processing Delete temp; Tail->next=nULL;         Break         }//For the next student to apply for memory temp->next=new struct student;   temp->next->forw=temp;         Set the front pointer temp=temp->next;    Causes the processing pointer temp to point to the new memory block}//To print the linked list data from beginning to end cout<< "head------>tail:" <<endl;    Temp=head;           while (temp!=null) {cout<<temp->name<< "," <<temp->math<< ",";           cout<<temp->computer<< "," <<temp->sum<<endl;     temp=temp->next;    }//To print the linked list data from the end of the head cout<< "tail------>head:" <<endl;    Temp=tail;           while (temp!=null) {cout<<temp->name<< "," <<temp->math<< ",";           cout<<temp->computer<< "," <<temp->sum<<endl;     temp=temp->forw; }} #endif

Union

#if 0/* Consortium-Shared body */#include <iostream>using namespace Std;main () {    int i;    Define Union type    Union utag  {          char    C;          int     k;          float   x;    };    Declares union variable    Union utag u;    Use the character member in the union variable     u.c= ' * ';    cout<< "u.c=" <<u.c<<endl;    Use integral member u.k=1000 in a union variable     ;    cout<< "u.k=" <<u.k<<endl;    Use floating-point member u.x=3.1416 in a union variable     ;    cout<< "u.x=" <<u.x<<endl;    Initialize    utag u1={' A '} when declaring union variables;    Also refer to the members of the Union variable    cout<< "u1.c=" <<u1.c<<endl;    cout<< "u1.k=" <<u1.k<<endl;    cout<< "u1.x=" <<U1.X<<ENDL;} #endif

Structure sizeof

#if 0/* struct sizeof*/#include <iostream>using namespace Std;main () {//defines the struct type and assigns the initial value struct S_tag to the declared structure variable {           Short I;    float x;    } sx={100,3.1416};            Define a union type and assign an initial value of union U_tag {short I to the declared union variable;    float x;    } ux={1000};    Information about the output structure type and structure variables cout<< "sizeof (struct S_tag) =" <<sizeof (struct S_tag) <<endl;    cout<< "sx.i=" <<sx.i<<endl;    cout<< "sx.x=" <<sx.x<<endl;    cout<< "sizeof (SX) =" <<sizeof (SX) <<endl;    cout<< "------------------------------" <<endl;    Information about the output union type and union variable cout<< "sizeof (union U_tag) =" <<sizeof (Union U_tag) <<endl;    ux.i=200;  cout<< "ux.i=" <<ux.i<<endl;    Output Union variable i member of UX ux.x=123.456;  cout<< "ux.x=" <<ux.x<<endl; The x member of the output union variable UX cout<< "sizeof (UX) =" <<sizeof (UX) <<endl;} #endif

typedef

#if 0/*typedef*/#include <iostream>using namespace Std;main () {    //Custom type     typedef  INT  Array_int [n];    int i;    Array_int A;    Declare the array variable a     //below with the custom type A, and print the For      (i=0;i<50;i++) {       if (i%5==0)       //Every 10 digits for a row          cout<< Endl;       a[i]=i;       cout<<a[i]<< "\ t";     }    Cout<<endl;} #endif

Comprehensive

#if 0/*sizeof Synthesis */#include <iostream>using namespace std;//define struct type struct student{int num;    Char name[20]; float grade;};    void Main (void) {//declare array int i,size;    Char str[]= "This is a string.";     int int_values[] = {51, 23, 2, 44, 45,0,11};      Float float_values[] = {15.1, 13.3, 22.2, 10.4, 1.5};    Student st_arr[]={101, "Wanglin", 92,102, "Liping", 85,103, "Zhaomin", 88};    Displays a char type array element and its size size=sizeof (str)/sizeof (char);    cout<< "Number of elements in str:";    cout<<size<<endl;    for (i=0;i<size;i++) {cout<<str[i];    } cout<<endl;    Displays an array element of type int and its size size=sizeof (int_values)/sizeof (int);    cout<< "Number of elements in int_values:";    cout<<size<<endl;    for (i=0;i<size;i++) {cout<<int_values[i]<< "";    } cout<<endl;    Displays the float type array element and its size size=sizeof (float_values)/sizeof (float);    cout<< "Number of elements in float_values:"; Cout<<size<<endl;    for (i=0;i<size;i++) {cout<<float_values[i]<< "";    } cout<<endl;    Displays an array element of type student and its size size=sizeof (St_arr)/sizeof (student);    cout<< "Number of elements in St_arr:";    cout<<size<<endl;        for (i=0;i<size;i++) {cout<<st_arr[i].num<< "";        cout<<st_arr[i].name<< "";    cout<<st_arr[i].grade<<endl; }} #endif

C + + Base instance-struct type (3)