hwh/8th.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 100
struct Student {
    char *id;
    char *clas;
    char *name;
    double score1;
    double score2;
    double score3;
    double totalScore;
};
struct Student students[MAX_STUDENTS];
int studentCount = 0;
// 函数声明
void menu();
void inputStudent();
void deleteStudent();
void selectStudent();
void orderStudents();
void outputStudents();
void freeMemory();
// 主函数
int main() {
    int option;
    do {
        menu();
        printf("please input your option: \n");
        scanf("%d", &option);
        switch(option) {
            case 1: inputStudent(); break;
            case 2: deleteStudent(); break;
            case 3: selectStudent(); break;
            case 4: orderStudents(); break;
            case 5: outputStudents(); break;
            case 6: freeMemory(); return 0; // 清理内存并退出
        }
    } while (option != 6);
    return 0;
}
// 菜单函数
void menu() {
    printf("1.input\n2.delete\n3.select\n4.order\n5.output\n6.quit\n");
}
// 输入学生信息
void inputStudent() {
    char continueInput[4];
    do {
        students[studentCount].id = (char *)malloc(20 * sizeof(char));
        students[studentCount].clas = (char *)malloc(20 * sizeof(char));
        students[studentCount].name = (char *)malloc(20 * sizeof(char));

        printf("Id ");
        scanf("%s", students[studentCount].id);
        printf("class ");
        scanf("%s", students[studentCount].clas);
        printf("name ");
        scanf("%s", students[studentCount].name);
        printf("score1 ");
        scanf("%lf", &students[studentCount].score1);
        printf("score2 ");
        scanf("%lf", &students[studentCount].score2);
        printf("score3 ");
        scanf("%lf", &students[studentCount].score3);

        students[studentCount].totalScore = students[studentCount].score1 + students[studentCount].score2 + students[studentCount].score3;
        studentCount++;
        printf("continue? \n");
        scanf("%s", continueInput);
    } while (strcmp(continueInput, "yes") == 0);
}
// 删除学生信息
void deleteStudent() {
    char target[20];
    char continueDelete[4];
    int found = 0;
    do {
        found = 0;
        scanf("%s", target);
		int i1;
        for (i1 = 0; i1 < studentCount; i1++) {
            if (strcmp(students[i1].id, target) == 0 || strcmp(students[i1].name, target) == 0) {
                free(students[i1].id);
                free(students[i1].clas);
                free(students[i1].name);
                memmove(&students[i1], &students[i1+1], (studentCount - i1 - 1) * sizeof(struct Student));
                studentCount--;
                found = 1;
                int l;
				for(l =0;l<studentCount;l++){
					printf("%s,%s,%s,%.1f,%.1f,%.1f,%.1f\n",students[l].id,students[l].clas,students[l].name,students[l].score1,students[l].score2,students[l].score3,students[l].totalScore);
				}
                break; }
        }
        if (!found) {
            printf("there is no eligible student.\n");
        }
        printf("continue? \n");
        scanf("%s", continueDelete);
    } while (strcmp(continueDelete, "yes") == 0);
}
// 查询学生信息
void selectStudent() {
    char target[20];
    char continueSelect[4];
    int found = 0;

    do {
        found = 0;
        scanf("%s", target);
		int i2;
        for (i2 = 0; i2 < studentCount; i2++) {
            if (strcmp(students[i2].id, target) == 0 || strcmp(students[i2].clas, target) == 0) {
                printf("%s,%s,%s,%.1f,%.1f,%.1f,%.1f\n", students[i2].id, students[i2].clas, students[i2].name, students[i2].score1, students[i2].score2, students[i2].score3, students[i2].totalScore);
                found = 1;
            }
        }
        if (!found) {
            printf("there is no eligible student.\n");
        }
        printf("continue? \n");
        scanf("%s", continueSelect);
    } while (strcmp(continueSelect, "yes") == 0);
}
// 排序学生信息
void orderStudents() {
    int i3;
	for (i3 = 0; i3 < studentCount - 1; i3++) {
        int j;
		for (j = 0; j < studentCount - 1 - i3; j++) {
            if (strcmp(students[j].clas, students[j + 1].clas) > 0 ||
                (strcmp(students[j].clas, students[j + 1].clas) == 0 && students[j].totalScore < students[j + 1].totalScore)) {
                struct Student temp = students[j];
                students[j] = students[j + 1];
                students[j + 1] = temp;
            }
        }
    }
    outputStudents();
}
void outputStudents() {
        
		int i4;
		for (i4 = 0; i4 < studentCount; i4++) {
            printf("%s,%s,%s,%.1f,%.1f,%.1f,%.1f\n", students[i4].id, students[i4].clas, students[i4].name, students[i4].score1, students[i4].score2, students[i4].score3, students[i4].totalScore);
        }
}
void freeMemory(){
	int i;
	for(i = 0;i<studentCount;i++){
		free(students[i].id);
		free(students[i].clas);
		free(students[i].name);
	}
}