C语言学生成绩信息管理系统

以下是一个简单的C语言学生成绩信息管理系统的示例：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct student_information {
    char name[15]; //姓名
    char number[15]; //学号
    int score[3]; //三科成绩
    struct student_information *next;
} student_information;

// 初始化链表
student_information *initList() {
    student_information *head;
    head = (student_information *)malloc(sizeof(student_information));
    head->next = NULL;
    return head;
}

// 添加学生信息
void addStudent(student_information *head) {
    int judge;
    while (1) {
        printf("是否继续输入成绩: 1(是)/0(否) ");
        scanf("%d", &judge);
        if (judge == 1) {
            student_information *p;
            p = (student_information *)malloc(sizeof(student_information));
            printf("请输入学生姓名: ");
            scanf("%s", p->name);
            printf("请输入学生学号: ");
            scanf("%s", p->number);
            printf("请输入学生三科成绩: ");
            scanf("%d %d %d", &p->score[0], &p->score[1], &p->score[2]);
            if (!head->next) {
                head->next = p;
                p->next = NULL;
            } else {
                p->next = head->next;
                head->next = p;
            }
        } else {
            break;
        }
    }
}

// 查询学生信息
void searchStudent(student_information *head, char *number) {
    student_information *p = head->next;
    while (p) {
        if (strcmp(p->number, number) == 0) {
            printf("学生姓名: %s\n", p->name);
            printf("学生学号: %s\n", p->number);
            printf("学生三科成绩: %d %d %d\n", p->score[0], p->score[1], p->score[2]);
            return;
        }
        p = p->next;
    }
    printf("未找到该学生信息\n");
}

// 修改学生信息
void modifyStudent(student_information *head, char *number) {
    student_information *p = head->next;
    while (p) {
        if (strcmp(p->number, number) == 0) {
            printf("请输入学生姓名: ");
            scanf("%s", p->name);
            printf("请输入学生学号: ");
            scanf("%s", p->number);
            printf("请输入学生三科成绩: ");
            scanf("%d %d %d", &p->score[0], &p->score[1], &p->score[2]);
            printf("修改成功\n");
            return;
        }
        p = p->next;
    }
    printf("未找到该学生信息\n");
}

// 删除学生信息
void deleteStudent(student_information *head, char *number) {
    student_information *p = head->next;
    student_information *pre = head;
    while (p) {
        if (strcmp(p->number, number) == 0) {
            pre->next = p->next;
            free(p);
            printf("删除成功\n");
            return;
        }
        pre = p;
        p = p->next;
    }
    printf("未找到该学生信息\n");
}

// 打印所有学生信息
void printAllStudents(student_information *head) {
    student_information *p = head->next;
    while (p) {
        printf("学生姓名: %s\n", p->name);
        printf("学生学号: %s\n", p->number);
        printf("学生三科成绩: %d %d %d\n", p->score[0], p->score[1], p->score[2]);
        p = p->next;
    }
}

int main() {
    student_information *head = initList();
    int choice;
    char number[15];
    
    while (1) {
        printf("请选择操作：\n");
        printf("1. 添加学生信息\n");
        printf("2. 查询学生信息\n");
        printf("3. 修改学生信息\n");
        printf("4. 删除学生信息\n");
        printf("5. 打印所有学生信息\n");
        printf("0. 退出\n");
        scanf("%d", &choice);
        
        switch (choice) {
            case 1:
                addStudent(head);
                break;
            case 2:
                printf("请输入要查询的学生学号: ");
                scanf("%s", number);
                searchStudent(head, number);
                break;
            case 3:
                printf("请输入要修改的学生学号: ");
                scanf("%s", number);
                modifyStudent(head, number);
                break;
            case 4:
                printf("请输入要删除的学生学号: ");
                scanf("%s", number);
                deleteStudent(head, number);
                break;
            case 5:
                printAllStudents(head);
                break;
            case 0:
                return 0;
            default:
                printf("无效的选择\n");
                break;
        }
    }
    
    return 0;
}