C Language Course Design-student information management system, student management system C Language

C Language Course Design-student information management system, student management system C Language

# Include "stdio. h "// standard input/output function File Header description # include" math. h "// mathematical function header description # include" string. h "# include" stdlib. h "// use the function in the function header to change the background and color of the console # include" windows. h "// header file declaration. The following describes how to change the width and height of the console # define M 100 // macro definition description struct student {// struct definition and char name [25]; // name: char num [25]; // student ID: char credit [20]; // ID number: char native [35]; // Nationality: char tel [25]; // mobile phone number int special; // professional int banji; // class int math, yy, wl, cyy, pe; // mathematics, English, physics, C language, sports doub Le ave ;}; // average score //*********************************** ******************************** * *********** void input (struct student stu [M]); // Input Function void output (struct student stu [M]); // declaration of various user-defined functions void lookfor (struct student stu [M]); // query function void modify (struct student stu [M]); // modify function void order (struct student stu [M]); // sorting function void delete_student (struct student stu [M]); // delete function void xuehao (struct student Stu [M]); void xingming (struct student stu [M]); void fileread (struct student stu [M]); void filewrite (struct student stu [M]); void yanshi (char * p ); // description of the latency function //********************************* **************************************** * ******************** int count = 0; struct student t; int main () {int choice, sum; struct student stu [M]; system ("mode con: cols = 400 lines = 30000 "); // adjust the width and height of the console. system ("color 0b "); // Adjust the console background and font color point1: sum = 0; yanshi ("\ t \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 welcome to the student information management system \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ 3 \ n "); do {printf ("\ t ------------------------------------------------------- \ n "); printf ("\ t + student information management system + \ n "); printf ("\ t ------------------------------------------------------- \ n "); printf ("\ t ************** \ n "); printf ("\ t 1. Add Student Information \ n "); printf (" \ t 2. Browse student information \ n "); printf ("\ t 3. query student information \ n "); printf ("\ t 4. Modify student information \ n "); printf ("\ t 5. Delete student information \ n "); printf ("\ t 6. Arrange student information \ n "); printf ("\ t 7. Read File student \ n "); // read printf from the file ("\ t 8, save to file \ n "); // save to the printf file ("\ t 9, exit the System \ n "); printf ("\ t ************* ** \ N "); printf (" Enter your choice \ n "); scanf (" % d ", & choice); fflush (stdin ); // clear the input buffer if (choice> 9 | choice <= 0) {sum ++; if (sum> = 5) {printf ("too many input errors, the program starts again \ n "); system (" pause "); // The program pauses system (" cls "); // The clear screen statement goto point1 ;}} switch (choice) // call different functions to complete different tasks {case 1: input (stu); break; case 2: output (stu); break; case 3: lookfor (stu); break; case 4: modify (stu); break; case 5: delete_student (stu); break; case 6: order (stu); break; c Ase 7: fileread (stu); break; case 8: filewrite (stu); break; case 9: printf ("Thank you for using the student information management system. Please turn off the program !!! \ N "); system (" pause "); break; default: printf (" invalid choice !!! Please enter it again !!! \ N "); break;} while (choice! = 9); printf ("the program is over !!! \ N "); return 0;} void input (struct student stu [M]) // custom input Function {int len, size; system (" cls "); printf ("add student information to enter \ n"); do {printf ("Enter the student ID \ n" consisting of 11 digits "); // do-while loop application, prompting a certain number of input digits scanf ("% s", & stu [count]. num); len = strlen (stu [count]. num);} while (len! = 11); printf ("Enter your classmate's name \ n"); scanf ("% s", stu [count]. name); do {printf ("Enter the student ID number \ n" consisting of 18 digits); // same as scanf ("% s", & stu [count]. credit); size = strlen (stu [count]. credit);} while (size! = 18); printf ("Enter the student's nationality \ n"); scanf ("% s", & stu [count]. native); printf ("Enter the student's mobile phone number \ n"); scanf ("% s", & stu [count]. tel); printf ("Enter the required professional code: 1. Computer Science 2. Communication Engineering 3. network engineering \ n "); // This method solves the problem of difficult professional input scanf ("% d", & stu [count]. special); printf ("Enter the corresponding student class number: 1, 1301 2, 1302 \ n"); scanf ("% d", & stu [count]. banji); do {printf ("Please enter scores of different subjects not greater than 100 \ n"); scanf ("% d ", & stu [count]. math, & stu [count]. yy, & stu [count]. wl, & stu [count]. cyy, & stu [coun T]. pe);} while (stu [count]. math> 100 | stu [count]. yy> 100 | stu [count]. wl> 100 | stu [count]. cyy> 100 | stu [count]. pe> 100); // same as stu [count]. ave = (stu [count]. math + stu [count]. yy + stu [count]. wl + stu [count]. cyy + stu [count]. pe)/5.0; // calculate the average value count ++;} void output (struct student stu [M]) // custom output function {int j; system ("cls"); if (count = 0) {printf ("the current number of students is 0 \ n"); return ;}for (j = 0; j <count; j ++) {printf ("student ID \ t name \ t ID card number \ t nationality \ t mobile phone number \ t \ T major \ t class \ t mathematics \ t English \ t physics \ tC language \ t sports \ t average score \ n "); for (j = 0; j <count; j ++) {// for loop control the number of output printf ("% s \ t", stu [j]. num); printf ("% s \ t", stu [j]. name); printf ("% s \ t", stu [j]. credit); printf ("% s \ t", stu [j]. native); printf ("% s \ t", stu [j]. tel); if (stu [j]. special = 1) printf ("Computer Science \ t"); else if (stu [j]. special = 2) printf ("Communication Engineering \ t"); else printf ("network engineering \ t"); printf ("% d \ t", stu [j]. banji); printf ("% d \ t", stu [j]. math); printf ("% d \ t", stu [j]. y Y); printf ("% d \ t", stu [j]. wl); printf ("% d \ t", stu [j]. cyy); printf ("% d \ t", stu [j]. pe); printf ("%. 1lf \ t \ n ", stu [j]. ave) ;}} void lookfor (struct student stu [M]) // User-Defined student information query function {int j, flag = 0; char xh [25]; system ("cls"); if (count = 0) {printf ("the number of currently saved student information is 0, and cannot be queried !!! \ N "); return;} else {printf (" Enter your student ID \ n "); scanf (" % s ", & xh ); fflush (stdin); for (j = 0; j <count; j ++) {if (strcmp (stu [j]. num, xh) = 0) // compares the student information that has been saved through the character function, find the student {printf ("student ID \ t name \ t ID card number \ t nationality \ t mobile phone number \ t major \ t class \ t mathematics \ t \ t English \ t physical \ tC language \ t sports \ t average score \ n "); printf ("% s \ t", stu [j]. num); printf ("% s \ t", stu [j]. name); printf ("% s \ t", stu [j]. credit); printf ("% s \ t", stu [j]. native); printf ("% s \ t", stu [j]. tel); if (stu [j]. special = 1) printf ("count Computer Science \ t "); else if (stu [j]. special = 2) printf ("Communication Engineering \ t"); else printf ("network engineering \ t"); printf ("% d \ t", stu [j]. banji); // consider an alignment factor printf ("% d \ t", stu [j]. math); printf ("% d \ t", stu [j]. yy); printf ("% d \ t", stu [j]. wl); printf ("% d \ t", stu [j]. cyy); printf ("% d \ t", stu [j]. pe); printf ("%. 1lf \ t ", stu [j]. ave) ;}} if (j = count) printf ("sorry, no student information you need \ n ");}} void modify (struct student stu [M]) // UDF {int j, flag = 0, course; char xh [25]; syste M ("cls"); if (count = 0) {printf ("the number of currently saved student information is 0 and cannot be modified !!! \ N "); return;} else {printf (" Enter your student ID \ n "); scanf (" % s ", & xh ); fflush (stdin); for (j = 0; j <count; j ++) if (strcmp (stu [j]. num, xh) = 0) // same as {printf ("are you sure you want to modify the student information ??? If you are not sure, please turn off this program !!! \ N "); printf (" Selected Courses: 1, mathematics 2, English 3, physics 4, C language 5, sports \ n "); scanf (" % d ", & course); printf ("Enter your Student Score \ n"); switch (course) {case 1: scanf ("% d ", & stu [j]. math); break; case 2: scanf ("% d", & stu [j]. yy); break; // switch control statement case 3: scanf ("% d", & stu [j]. wl); break; case 4: scanf ("% d", & stu [j]. cyy); break; case 5: scanf ("% d", & stu [j]. pe); break; default: printf ("invalid choice !!! Please enter it again !!! \ N "); break ;}}} void delete_student (struct student stu [M]) // custom delete function {int choice; system (" cls "); if (count = 0) {printf ("the number of currently saved student information is 0 and cannot be deleted !!! \ N "); return;} else {printf (" select the method you want to delete: 1. Student ID 2. Name (if your name is in Chinese, it cannot be deleted, select the student ID to delete. 3. Cancel \ n "); scanf (" % d ", & choice); switch (choice) // The switch statement selects the method to delete the user {case 3: return; break; case 2: xingming (stu); break; // Use case 1: xuehao (stu); break; default: printf ("invalid choice !!! Please enter it again !!! \ N "); break ;}} void order (struct student stu [M]) // the definition of the sorting function {int j, k, choice, index; system ("cls"); printf ("Enter the method you want to sort (all sorting methods are in descending order )!!! \ N "); printf (" 1, mathematics 2, English 3, physics 4, C language 5, sports 6, average score \ n "); scanf (" % d ", & choice); switch (choice) {case 1: for (j = 0; j <count; j ++) {index = j; for (k = j + 1; k <count; k ++) if (stu [k]. math> stu [index]. math) {t = stu [k]; stu [k] = stu [index]; stu [index] = t ;}}; break; case 2: for (j = 0; j <count; j ++) {index = j; for (k = j + 1; k <count; k ++) if (stu [k]. yy> stu [index]. yy) {stu [k] = stu [index] ;}// the entire sorting part adopts the so-called method of selecting and sorting}; break; case 3: for (j = 0; j <count; J ++) {index = j; for (k = j + 1; k <count; k ++) if (stu [k]. wl> stu [index]. wl) {t = stu [k]; stu [k] = stu [index]; stu [index] = t ;}}; break; case 4: for (j = 0; j <count; j ++) {index = j; for (k = j + 1; k <count; k ++) if (stu [k]. cyy> stu [index]. cyy) {t = stu [k]; stu [k] = stu [index]; stu [index] = t ;}}; break; case 5: for (j = 0; j <count; j ++) {index = j; for (k = j + 1; k <count; k ++) if (stu [k]. pe> stu [index]. pe) {t = stu [k]; stu [k] = stu [index]; stu [index] = t ;}}; Break; case 6: for (j = 0; j <count; j ++) {index = j; for (k = j + 1; k <count; k ++) if (stu [k]. ave> stu [index]. ave) {t = stu [k]; stu [k] = stu [index]; stu [index] = t ;}// the force type conversion symbol can only be used with operands, according to the type conversion problem in the value assignment operation, we can see}; break; default: printf ("invalid choice !!! Please enter it again !!! \ N "); break ;}} void xuehao (struct student stu [M]) // you can customize the student information deletion function {int j, index = 0, k = count; char xh [25]; system ("cls"); printf ("Enter the student ID you want to delete \ n"); scanf ("% s ", xh); fflush (stdin); for (j = 0; j <count; j ++) {if (strcmp (stu [j]. num, xh) = 0) {for (j = index; j <count; j ++) stu [j] = stu [j + 1]; count --; if (count <k) printf ("You have deleted successfully \ n");} index ++;} if (j = count) printf ("Sorry !!! No student information you need to delete! *_*! \ N ");} void xingming (struct student stu [M]) // User-Defined student information deletion function {int flag = 0, j, k = count; char xm [25]; system ("cls"); printf ("enter the name of the student you want to delete \ n"); scanf ("% s", xm ); fflush (stdin); for (j = 0; j <count; j ++) {if (strcmp (stu [j]. num, xm) = 0) {for (j = flag-1; j <count; j ++) stu [j] = stu [j + 1]; count --; if (count <k) printf ("You have deleted successfully \ n");} flag ++;} if (j = count) printf ("Sorry !!! No student information you need to delete! *_*! \ N ");} void yanshi (char * p) // definition of the latency function {while (1) {if (* p! = 0) printf ("% c", * p ++); elsebreak; Sleep (100 ); // intermittent latency control statement} void filewrite (struct student stu [M]) // Write FILE function definition {int j = 0; char c; FILE * fp; printf ("Please choose whether to save the entered student information: 'y' or 'N '??? \ N "); scanf (" % c ", & c); fflush (stdin); while (c! = 'Y' & c! = 'N') {if (c! = 'Y' & c! = 'N') printf ("input error, please input \ n" again); printf ("the following operations will overwrite the stored data, are you sure you want to enter 'y' or 'N '??? \ N "); scanf (" % c ", & c); fflush (stdin);} if (c = 'y ') {if (fp = fopen ("d :\\ stu. dat "," wb ") = NULL) {printf (" file opening error, \ n cannot be performed by the program "); exit (0) ;}for (j = 0; j <count; j ++) {fwrite (& stu [j], sizeof (struct student), 1, fp) ;}fclose (fp ); if (count = 0) printf ("no file, cannot save \ n"); elseprintf ("Data Storage completed \ n"); system ("pause ");} elsereturn;} void fileread (struct student stu [M]) // function definition for reading FILE information {int j = 0; char c; FILE * fp; system ("cls "); printf ("Please select whether to save the entered student information: 'y 'Or 'N '??? \ N "); scanf (" % c ", & c); fflush (stdin); while (c! = 'Y' & c! = 'N') {if (c! = 'Y' & c! = 'N') printf ("input error, please input \ n" again); printf ("the following operations will overwrite the stored data, are you sure you want to enter 'y' or 'N '??? \ N "); scanf (" % c ", & c); fflush (stdin);} if (c = 'y ') {if (fp = fopen ("d :\\ stu. dat "," rb ") = NULL) {printf (" An error occurred while opening the file. The program cannot perform \ n "); exit (0 );} fread (& stu [j], sizeof (struct student), 1, fp); count = 0; count ++; j ++; while (fread (& stu [j], sizeof (struct student), 1, fp) {j ++; count ++;} fclose (fp ); printf ("Data Reading is complete !!! \ N "); system (" pause ");} elsereturn ;}