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This article mainly introduces the relevant knowledge of "how to use C language linked list to achieve sales management system". The editor shows you the operation process through an actual case, the operation method is simple and fast, and has strong practicability. I hope this article "how to use C language linked list to achieve sales management system" can help you solve the problem.

Source code # include#include#includetypedef struct sale {char no [12]; / Code char name [40]; / / name int month [12]; / / month float sales [12]; / / monthly sales float total; / / Annual total sales struct sale * next; / / pointer to the next node} SALE / / the function declaration is put here void ListCreate (SALE * L, int n); / / create a linked list node void LIstSearch (SALE * L); / / find a salesperson's monthly sales void ListModify (SALE * L); / / modify a salesperson's monthly sales void ListDelete (SALE * L); / / delete a salesperson's sales information void Input (SALE * p, int I) / enter monthly sales and related information void Sum (SALE * L); / count total annual sales of all salespeople void SumSale (SALE * L); / output total annual sales of all salespeople void Max (SALE * L); / / find out maximum monthly sales and annual total sales void Min (SALE * L) / / find out the maximum monthly sales and total annual sales void Menu (); / / the menu of the sales management system / / the main function entry of the sales management system int main () {int item, n; / item to receive input commands, n to receive input salespeople SALE * L = NULL / / initialize a header node L = (SALE *) malloc (sizeof (SALE)); / / Open up memory space for the header node L-> next = NULL; / / empty the pointer domain of the header node do {Menu () / menu printf ("Please enter the appropriate number and do the appropriate operation:\ n"); scanf ("% d", & item); system ("cls"); switch (item) {case 1: printf ("Please enter the number of salespeople you want to enter:") Scanf ("% d", & n); ListCreate (L, n); getchar (); printf ("Please press any key to return to the main menu\ n"); getchar (); system ("cls"); break; case 2: LIstSearch (L); getchar () Printf ("\ nPlease press any key to return to the main menu\ n"); getchar (); system ("cls"); break; case 3: ListModify (L); / / modify a salesperson's monthly sales getchar (); printf ("\ nPlease press any key to return to the main menu\ n") Getchar (); system ("cls"); break; case 4: ListDelete (L); / / delete message getchar (); printf ("\ nPlease press any key to return to the main menu\ n"); getchar (); system ("cls"); break Case 5: Sum (L); SumSale (L); getchar (); printf ("Please press any key to return to the main menu\ n"); getchar (); system ("cls"); break; case 6: Sum (L); Max (L) Printf ("\ n"); Min (L); getchar (); printf ("Please press any key to return to the main menu\ n"); getchar (); system ("cls"); break Case 0: / exit the sales management system printf ("about to quit the sales management system."); exit (0); default: printf ("the instructions you entered are incorrect, please re-enter");} printf ("\ n\ n");} while (item); return 0 } / / create a linked list and insert the newly generated node into the header void ListCreate (SALE * L, int n) {int i; for (I = 0; I) of the linked list.

Next = L-> next; L-> next = p;} printf ("input successful!") ;} / / find a salesperson's monthly sales void LIstSearch (SALE * L) {int a; char n [40]; SALE * p = L-> next; if (p = = NULL) printf ("data is empty, cannot be found!") ; else {printf ("Please enter the name of the salesperson you are looking for:"); scanf ("% s", n); while (strcmp (p-> name, n)! = 0) {p = p-> next; if (p = = NULL) {printf ("relevant information not found\ n") Return;}} printf ("Please enter the sales volume of the month in which you want to find the salesperson:"); scanf ("% d", & a); printf ("salesman% s% d sales% .2f\ n", p-> name,a,p- > salesman [a-1]) }} / / modify a salesperson's monthly sales void ListModify (SALE * L) {int a; char nam [40]; SALE * p = L-> next; if (p = = NULL) printf ("data is empty and cannot be modified!") ; else {printf ("Please enter your modified salesperson name:"); scanf ("% s", nam); while (strcmp (p-> name, nam)! = 0) {p = p-> next; if (p = = NULL) {printf ("relevant information not found\ n") Return;}} printf ("Please enter the sales volume of the month in which you modified the salesperson:"); scanf ("% d", & a); printf ("Please enter the sales volume of your modified% d month:", a); scanf ("% f", & p-> salesman [a-1]); printf ("modified successfully") }} / / Delete salesperson sales information void ListDelete (SALE * L) {char n [40]; SALE * p = L-> next, * pre = L; / / define the point of p pointer to head node, define pre to head node, pre always points to p's precursor node if (p = NULL) printf ("data is empty and cannot be deleted!") ; else {printf ("Please enter the name of the salesperson you want to delete:"); scanf ("% s", n); while (strcmp (p-> name, n)! = 0) {pre = p; p = pre- > next If (p = = NULL) {printf ("No relevant information was found and cannot be deleted\ n"); return;}} pre- > next = p-> next; free (p); printf ("deleted successfully") Void Sum (SALE * L) {int i; SALE * paired L-> next; while (paired null) {p-> total=0; for [I]; pairp-> next;}} / / output the total annual sales of all salespeople void SumSale (SALE * L) {SALE * paired L-> next Printf ("\ n code\ t name\ t\ t total annual sales\ n"); while (paired null) {printf ("\ n% s\ t\ t% s\ t\ t% .2f", p-> no,p- > name,p- > total); pairp-> next;}} / / find the maximum monthly sales and annual total sales void Max (SALE * L) {int i; float massif 0 / m is used to indicate monthly sales, y is used to denote annual sales SALE * pendant L-> next; while (paired sales null) {for (itemisales [I] > m) massip-> sales [I];} if (p-> total > y) yearly sales-> total; pendant-> next;} printf ("maximum monthly sales is% .2f yuan\ n", m) Printf ("maximum annual sales of% .2f yuan\ n", y);} / / find out the minimum monthly sales and annual total sales void Min (SALE * L) {int i; float mdepartment; / / m is used to denote monthly sales, y is used to denote annual sales SALE * paired L-> next; massif p-> sales [0]; yearly p-> total; while (paired null) {for (item1) Isals [I] salesman [I];} if (p-> totaltotal; pairp-> next;} printf ("minimum monthly sales is% .2f yuan\ n", m); printf ("minimum annual sales volume is% .2f yuan\ n", y);} / enter relevant information about salesperson's monthly sales void Input (SALE * p, int I) {int j Printf ("Please enter the% d salesperson code:", I + 1); scanf ("% s", p-> no); printf ("Please enter the name of the% d salesperson:", I + 1); scanf ("% s", p-> name); printf ("Please enter the 12-month sales of the% d salesperson (separated by spaces):", I + 1); for (j = 0; j; j)

Sales [j]); / / enter monthly sales}} / / menu of the sales management system void Menu () {printf ("\ n\ n"); printf ("\ t\ t\ tmanage = sales management system = =\ n"); printf ("\ t\ t\ t * author: XXX class: XXXXXXXXXXX student number: XXXXXXXXXX *\ n") Printf ("\ t\ t\ t *\ n"); printf ("\ t\ t\ t * 1 >. Enter the salesperson's monthly sales and its related information *\ n "); printf ("\ t\ t\ t * 2 >. Find a salesperson's monthly sales *\ n "); printf ("\ t\ t\ t * 3 >. Modify a salesperson's monthly sales *\ n "); printf ("\ t\ t\ t * 4 >. Delete a salesperson's sales information *\ n "); printf ("\ t\ t\ t * 5 >. Statistics of all salespeople's sales information *\ n "); printf ("\ t\ t\ t * 6 >. Find out the maximum (or minimum) monthly sales and total annual sales *\ n "); printf ("\ t\ t\ t * 0 >. Exit the management system *\ n "); printf ("\ t\ t\ t* Welcome to use this system! *\ n "); printf ("\ t\ t\ tkeeper =\ n ") Printf ("\ t\ t\ t enter options, press enter options:\ n");}

Main interface

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