Shulou(Shulou.com)06/02 Report--

This article mainly introduces how to realize the port management of the background management of the switch, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let the editor take you to know about it.

10 switch background management port management project requirements switch

Port:

1) Port name

2) Port statu

3) IP address of the port

4) Port Typ

WAN

LAN

Project realization

1. Add menu frame

# include # include # include FILE * file; void init (void) {/ / Open the file file = fopen ("users.txt", "r"); if (! file) {/ / equivalent to file = = NULL printf ("File opening failed"); / / return 1; exit (1);}} void login (void) {char name [32]; char password [16]; char line [128] Char name_tmp [32]; char password_tmp [16]; char * ret; / / enter user name and password while (1) {system ("cls"); / / enter user name and password printf ("Please enter user name:"); scanf ("% s", name); printf ("Please enter password:") Scanf ("% s", password); / / read the account from the file and make a judgment! While (1) {/ / read one line ret = fgets (line, sizeof (line), file); / / line: "admin 123456\ n" if (! ret) {break;} sscanf (line, "% s% s", name_tmp, password_tmp) If (! strcmp (name, name_tmp) & &! strcmp (password, password_tmp)) {break;}} if (ret) {/ / username and password match succeeded break;} else {printf ("wrong username or password!\ n"); system ("pause") System ("cls"); fseek (file, 0, SEEK_SET); / / set the location pointer inside the file to the header} void create_user (void) {system ("cls"); printf ("\ n\ nWhat-create account--\ n\ n"); printf ("to be implemented.\ n\ n") Printf ("press any key to return to the main menu"); fflush (stdin); getchar ();} void ip_admin (void) {system ("cls"); printf ("\ n\ n---IP management--\ n\ n"); printf ("to be implemented.\ n\ n"); printf ("press any key to return to the main menu"); fflush (stdin); getchar () } void logout (void) {system ("cls"); fclose (file); exit (0);} void input_error (void) {system ("cls"); printf ("\ n\ ninput error! \ n\ n "); printf ("\ n\ nPlease re-enter\ n\ n "after pressing any key); fflush (stdin); getchar ();} void show_memu (void) {system (" cls "); / / print function menu printf ("-switch background management -\ n "); printf (" 1. Create account\ n); printf ("2. IP Management\ n"); printf ("3. Exit\ n "); printf (" 4. Port Management\ n "); printf (" Please choose: ");} void show_ports (void) {system (" cls "); printf ("-- Port status -\ n "); printf (" to be implemented.\ n "); system (" pause ");} void set_ports (void) {system (" cls "); printf ("-Port setting -\ n ") Printf ("to be implemented.\ n"); system ("pause");} void port_admin (void) {char n; while (1) {system ("cls"); printf ("1. View port\ n "); printf (" 2. Set port\ n "); printf (" 3. Return to the main menu\ n "); printf (" Please select: "); fflush (stdin); scanf ("% c ", & n); if (n = ='1') {show_ports ();} else if (n = ='2') {set_ports ();} else if (n = ='3') {break } else {input_error ();} int main (void) {char n; / / menu number selected by the user init (); / / initialize login (); / / Log in to while (1) {show_memu (); fflush (stdin); scanf ("% c", & n) Switch (n) {case'1: create_user (); break; case'2: ip_admin (); break; case'3: logout (); break; case'4: port_admin (); break Default: input_error (); break;}} return 0;}

two。 Representation of port information

Add type definitions and port variables

Struct port {char name [16]; / / name of the port int status; / / 1: activate 0: disable char ip [16]; / / 192.168.1.5 char type [4]; / / port type LAN WAN}; / / 5 port variables struct port port1;struct port port2;struct port port3;struct port port4;struct port port5 are defined

Project realization

Void show_port (struct port port) {printf ("name [% s]\ t status [% s]\ tIP [% s]\ t type [% s]\ n", port.name, port.status = = 0? "disable": "activate", port.ip, port.type);} void show_ports (void) {system ("cls"); printf ("--Port status--\ n"); printf ("PORT1:\ t"); show_port (port1); printf ("PORT2:\ t"); show_port (port2); printf ("PORT3:\ t"); show_port (port3) Printf ("PORT4:\ t"); show_port (port4); system ("pause");} void set_port1 (void) {system ("cls"); printf ("--set PORT1 port -\ n"); printf ("Please enter port name:"); scanf ("% s", port1.name); printf ("Please enter port status: [0: disable] [1: activate]") Scanf ("% d", & port1.status); printf ("Please enter port type: [LAN or WAN]"); scanf ("% s", port1.type); printf ("Please enter IP address of port:"); scanf ("% s", port1.ip); system ("pause");} void set_port2 (void) {system ("cls") Printf ("--set PORT2 port -\ n"); printf ("Please enter port name:"); scanf ("% s", port2.name); printf ("Please enter port status: [0: prohibit] [1: activate]"); scanf ("% d", & port2.status); printf ("Please enter port type: [LAN or WAN]") Scanf ("% s", port2.type); printf ("Please enter the IP address of the port:"); scanf ("% s", port2.ip);} void set_port3 (void) {system ("cls"); printf ("--set PORT3 port -\ n"); printf ("Please enter port name:"); scanf ("% s", port3.name) Printf ("Please enter Port status: [0: disable] [1: activation]"); scanf ("% d", & port3.status); printf ("Please enter Port Type: [LAN or WAN]"); scanf ("% s", port3.type); printf ("Please enter IP address of Port:"); scanf ("% s", port3.ip) } void set_port4 (void) {system ("cls"); printf ("--set PORT4 port -\ n"); printf ("Please enter port name:"); scanf ("% s", port4.name); printf ("Please enter port status: [0: disable] [1: activate]"); scanf ("% d", & port4.status) Printf ("Please enter port type: [LAN or WAN]"); scanf ("% s", port4.type); printf ("Please enter IP address of port:"); scanf ("% s", port4.ip);} void set_port5 (void) {system ("cls"); printf ("--set PORT5 port -\ n"); printf ("Please enter port name:") Scanf (% s ", port5.name); printf (" Please enter port status: [0: disable] [1: activate] "); scanf ("% d ", & port5.status); printf (" Please enter port type: [LAN or WAN] "); scanf ("% s ", port5.type); printf (" Please enter port IP address: "); scanf ("% s ", port5.ip) } void set_ports (void) {char n; while (1) {system ("cls"); printf ("--Port setting -\ n"); printf ("1. PORT1\ n"); printf ("2. PORT2\ n"); printf ("3. PORT3\ n"); printf ("4. PORT4\ n"); printf ("5. PORT5\ n") Printf ("6. Return\ n "); printf (" Please select: "); fflush (stdin); scanf ("% c ", & n); switch (n) {case'1: set_port1 (); break; case'2: set_port2 (); break Case'3: set_port3 (); break; case'4: set_port4 (); break; case'5: set_port5 (); break; case'6: return; default: input_error (); break Project elaboration

1. Why use "structure" (structure)

However, when you need to represent some replication information, it is not convenient to use simple data types.

For example: student information (student number, name, class, telephone number, age)

two。 What is "structure"?

Structure is a "data type" defined by programmers.

Is a new "data type" that is composed of multiple basic data types, or other structures.

3. Definition of structure

Struct structure name {

Member type member name

Member type member name

}

Example:

Struct student {char name [16]; int age; char tel [12];}; Special attention:

1) start with struct

2) finally, use a semicolon

3) members are separated by semicolons

4. Initialization of structure

Demo

# include struct student {char name [16]; int age;}; int main (void) {struct student S1 = {"Rock", 38}; struct student S2 = {.age = 100,.name = "Zhang Sanfeng"}; struct student S3; s3.age = 40; strcpy (s3.name, "Yang Guo"); printf ("% s,% d\ n", s1.name, s1.age) Printf ("% s,% d\ n", s2.name, s2.age); printf ("% s,% d\ n", s3.name, s3.age); return 0;} 5. The use of structures / / define structure variables / / Note: the complete type name is struct student / / and not just studentstruct student S1, S2, struct, student, s1.name, scanf ("% s", s1.name); s1.name = 25; S2 = S1; / / values can be assigned directly between structure variables.

Form of use:

Structural body variable. Member variable

Use it in the middle. Separation

6. Use structure as function parameter # include # include struct student {char name [16]; int age; char tel [12];}; void work (struct student stu) {stu.age++; printf ("% s struct student stu% d\ n", stu.name, stu.age);} int main (void) {struct student s; strcpy (s.name, "Rock"); s.age = 38; work (s) / / the structure variable s, as a function parameter, does not change the value of s itself, printf ("% s _ 1% d\ n", s.name, s.age); return 0;}

Note:

It is generally not recommended to use the structure directly as a function parameter.

Because the size of the structure is relatively large, direct transmission, consumption of performance!

Solution (using pointers)

7. Global variables, local variables

Test1.c

# include void east_travel (void); char master [16] = "Nu WA"; void west_travel (void) {char master [16] = "Tang Monk"; printf ("[Journey to the West] Boss is% s\ n", master);} int main (void) {char master [16] = "Tathagata Buddha"; printf ("[main] Boss is:% s\ n", master); char c; printf ("do you enter the daughter's country?" (y or N)\ n "); fflush (stdin); scanf ("% c ", & c); if (cased daughter Y' | | caged daughter Y') {char master [16] =" Queen "; printf (" [main- daughter country] boss is:% s\ n ", master);} printf (" [main] boss is:% s\ n ", master); east_travel (); return 0;}

Test2.c

# include extern char master [16]; / / failed to initialize! Indicates that this global variable is defined in another file! Void east_travel (void) {printf ("[Journey to the East] boss is:% s\ n", master);}

Gcc test1.c test2.c

Project activity exercise 1

Implement project 10 independently

Exercise 2

1. Define a structure that describes the basic information of a game character.

The role information includes: name, gender, force value.

And ask the user to enter 1 role.

The running effect is as follows:

Reference Code:

# include struct role {char name [32]; char sex; / / 'male: female int power;}; int main (void) {struct role R1, R2; printf ("Please enter the name of the role:"); scanf ("% s", r1.name); fflush (stdin); printf ("Please enter the gender of the role:"); scanf ("% c", & r1.sex) Printf ("Please enter character's force value:"); scanf ("% d", & r1.power); printf ("\ nskill = role setting =\ n"); printf ("name:% s\ n", r1.name); printf ("gender:% c\ n", r1.sex); printf ("force value:% d\ n", r1.power); return 0 } Thank you for reading this article carefully. I hope the article "ccontroller + how to realize the port management of switch background management" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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