c 语言 学生结构体有:学号,姓名,英语成绩,计算机成绩. 定义一个5个学生的数组,用函数完成如下功能: 做一个函数,可以录入学生信息 做一个函数,可以显示所有学生信息 做一个函数,可以增加一个学生信息 做一个函数,可以根据学号删除改学生信息 做一个函数,可以通过学号查找学生信息

以下是一个用C语言实现的学生结构体数组的功能示例：

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

#define MAX_STUDENTS 5

struct Student {
    char* studentID;
    char* name;
    int englishScore;
    int computerScore;
};

void inputStudentInfo(struct Student* students, int index) {
    students[index].studentID = (char*)malloc(sizeof(char) * 20);
    students[index].name = (char*)malloc(sizeof(char) * 20);

    printf("请输入学生的学号：");
    scanf("%s", students[index].studentID);
    printf("请输入学生的姓名：");
    scanf("%s", students[index].name);
    printf("请输入学生的英语成绩：");
    scanf("%d", &(students[index].englishScore));
    printf("请输入学生的计算机成绩：");
    scanf("%d", &(students[index].computerScore));
}

void displayAllStudents(struct Student* students) {
    printf("所有学生的信息如下：\n");
    for (int i = 0; i < MAX_STUDENTS; i++) {
        printf("学生%d：\n", i + 1);
        printf("学号：%s\n", students[i].studentID);
        printf("姓名：%s\n", students[i].name);
        printf("英语成绩：%d\n", students[i].englishScore);
        printf("计算机成绩：%d\n", students[i].computerScore);
        printf("\n");
    }
}

void addStudent(struct Student* students) {
    int index = -1;
    for (int i = 0; i < MAX_STUDENTS; i++) {
        if (students[i].studentID == NULL) {
            index = i;
            break;
        }
    }

    if (index == -1) {
        printf("学生数组已满，无法添加新学生。\n");
        return;
    }

    inputStudentInfo(students, index);
}

void deleteStudent(struct Student* students, char* studentID) {
    int index = -1;
    for (int i = 0; i < MAX_STUDENTS; i++) {
        if (students[i].studentID != NULL && strcmp(students[i].studentID, studentID) == 0) {
            index = i;
            break;
        }
    }

    if (index == -1) {
        printf("未找到学号为%s的学生。\n", studentID);
        return;
    }

    free(students[index].studentID);
    free(students[index].name);
    students[index].studentID = NULL;
    students[index].name = NULL;
}

void searchStudent(struct Student* students, char* studentID) {
    int index = -1;
    for (int i = 0; i < MAX_STUDENTS; i++) {
        if (students[i].studentID != NULL && strcmp(students[i].studentID, studentID) == 0) {
            index = i;
            break;
        }
    }

    if (index == -1) {
        printf("未找到学号为%s的学生。\n", studentID);
        return;
    }

    printf("学生的信息如下：\n");
    printf("学号：%s\n", students[index].studentID);
    printf("姓名：%s\n", students[index].name);
    printf("英语成绩：%d\n", students[index].englishScore);
    printf("计算机成绩：%d\n", students[index].computerScore);
}

int main() {
    struct Student students[MAX_STUDENTS];

    for (int i = 0; i < MAX_STUDENTS; i++) {
        students[i].studentID = NULL;
        students[i].name = NULL;
    }

    inputStudentInfo(students, 0);
    inputStudentInfo(students, 1);
    displayAllStudents(students);
    addStudent(students);
    displayAllStudents(students);
    deleteStudent(students, "123");
    displayAllStudents(students);
    searchStudent(students, "456");

    return 0;
}