C课设指南示例代码(Student模块)

#include "CRUD.h" #include <string.h> extern char *studentFile; extern char *courseFile; extern char *scoreFile; extern Student *students; extern Course *courses; extern Score *scores; extern int studentCount; extern int courseCount; extern int scoreCount; void addStudent() { printf("Add Student\n"); Student student; printf("Enter Student ID: "); scanf("%d", &student.id); printf("Enter Student Name: "); scanf("%s", student.name); printf("Enter Student Gender(M/F):"); getchar(); char c; scanf("%c", &c); student.gender = isMale(c); printf("Enter Student Birthday(dd/mm/yyyy): "); scanf("%d/%d/%d", &student.birthday.day, &student.birthday.month, &student.birthday.year); // memory students = (Student *)realloc(students, sizeof(Student) * (studentCount + 1)); students[studentCount++] = student; // disk FILE *fp = fopen(studentFile, "a"); fprintf(fp, "%d,%s,%d,%d/%d/%d", student.id, student.name, student.gender, student.birthday.day, student.birthday.month, student.birthday.year); fclose(fp); } void editStudent() { int id; printf("Enter Student ID: "); scanf("%d", &id); int index = getStudentIndexByID(id); if (index == -1) { printf("Student Not Found\n"); return; } printf("Edit Student\n"); Student student; printf("What do you want to edit?\n"); printf("1. Name\n"); printf("2. Gender\n"); printf("3. Birthday\n"); int choice; scanf("%d", &choice); char c; switch (choice) { case 1: printf("Enter Student Name: "); scanf("%s", student.name); break; case 2: printf("Enter Gender(M/F): "); getchar(); scanf("%c", &c); student.gender = isMale(c); break; case 3: printf("Enter Student Birthday(dd/mm/yyyy): "); scanf("%d/%d/%d", &student.birthday.day, &student.birthday.month, &student.birthday.year); break; default: printf("Invalid Choice\n"); return; } // memory students[index] = student; // disk saveStudent(); } void deleteStudent() { int id; printf("Enter Student ID: "); scanf("%d", &id); int index = getStudentIndexByID(id); if (index == -1) { printf("Student Not Found\n"); return; } // memory for (int i = index; i < studentCount - 1; ++i) students[i] = students[i + 1]; students = (Student *)realloc(students, sizeof(Student) * (studentCount - 1)); studentCount--; // disk saveStudent(); } void searchStudent() { Student studentInput; Student *studentOutput; int outputCount = 0; printf("You want to search a student by...\n"); printf("1. ID\n"); printf("2. Name\n"); printf("3. Gender\n"); printf("4. Birthday\n"); int choice; scanf("%d", &choice); switch (choice) { case 1: studentOutput = searchStudentByID(&studentInput); outputCount = 1; break; case 2: studentOutput = searchStudentByName(&studentInput, &outputCount); break; case 3: studentOutput = searchStudentByGender(&studentInput, &outputCount); break; case 4: studentOutput = searchStudentByBirthday(&studentInput, &outputCount); break; default: printf("Invalid Choice\n"); return; } if (studentOutput == NULL) { printf("Student Not Found\n"); return; } printf("Student Found\n"); for (int i = 0; i < outputCount; ++i) printStudent(&(studentOutput[i])); } int getStudentIndexByID(int id) { for (int i = 0; i < studentCount; i++) if (students[i].id == id) return i; return -1; } Student *searchStudentByID(Student *student) { int id = student->id; int index = getStudentIndexByID(id); if (index == -1) return NULL; return &(students[index]); } Student *searchStudentByName(Student *student, int *outputCount) { char *name = student->name; Student *output; for (int i = 0; i < studentCount; ++i) if (strcmp(students[i].name, student->name) == 0) { output = (Student *)realloc(output, sizeof(Student) * (*outputCount + 1)); output[(*outputCount)++] = students[i]; } return output; } Student *searchStudentByGender(Student *student, int *outputCount) { bool gender = student->gender; Student *output; for (int i = 0; i < studentCount; ++i) { if (students[i].gender == gender) { output = (Student *)realloc(output, sizeof(Student) * (*outputCount + 1)); output[(*outputCount)++] = students[i]; } } return output; } Student *searchStudentByBirthday(Student *student, int *outputCount) { Birthday birthday = student->birthday; Student *output; for (int i = 0; i < studentCount; ++i) { if (students[i].birthday.day == birthday.day && students[i].birthday.month == birthday.month && students[i].birthday.year == birthday.year) { output = (Student *)realloc(output, sizeof(Student) * (*outputCount + 1)); output[(*outputCount)++] = students[i]; } } return output; } bool isMale(char c) { if (c == 'M' || c == 'm') return true; else if (c == 'F' || c == 'f') return false; else { printf("Invalid Gender\n"); return false; } } void loadStudent() { // load student from file FILE *fp = fopen(studentFile, "r"); if (fp == NULL) return; Student student; char buf[1024]; char *res; char *b; while (fscanf(fp, "%s", buf) != EOF) { res = strtok(buf, ","); student.id = atoi(res); res = strtok(NULL, ","); strcpy(student.name, res); res = strtok(NULL, ","); if (strcmp(res, "1") == 0) student.gender = true; else student.gender = false; res = strtok(NULL, ","); b = strtok(res, "/"); student.birthday.day = atoi(b); b = strtok(NULL, "/"); student.birthday.month = atoi(b); b = strtok(NULL, "/"); student.birthday.year = atoi(b); students = (Student *)realloc(students, sizeof(Student) * (studentCount + 1)); students[studentCount++] = student; } } void saveStudent() { FILE *fp = fopen(studentFile, "w"); Student student; for (int i = 0; i < studentCount; ++i) { student = students[i]; fprintf(fp, "%d,%s,%d,%d/%d/%d", student.id, student.name, student.gender, student.birthday.day, student.birthday.month, student.birthday.year); if (i != studentCount - 1) fprintf(fp, "\n"); } fclose(fp); } void printStudent(Student *student) { printf("ID: %d\n", student->id); printf("Name: %s\n", student->name); printf("Gender: "); if (student->gender) printf("Male\n"); else printf("Female\n"); printf("Birthday: %d/%d/%d\n", student->birthday.day, student->birthday.month, student->birthday.year); } void printStudentList() { for (int i = 0; i < studentCount; ++i) printStudent(&(students[i])); }