1、掌握结构体类型变量的定义和使用方法；2、掌握结构体类型数组的概念和使用方法；根据实验题目，自行设计结构体类型的C语言程序。

程序代码或实现过程：

#include <stdio.h>

#include <string.h>

struct Student {

????char num[20];

????char name[20];

????float score[2];

};

void print(struct Student student[]) {

????int i, j;

????for (i = 0; i < 3; i++) {

????????printf("学号：%s\n", student[i].num);

????????printf("姓名：%s\n", student[i].name);

????????printf("成绩：");

????????for (j = 0; j < 2; j++) {

????????????printf("%.2f ", student[i].score[j]);

????????}

????????printf("\n\n");

????}

}

int main() {

????struct Student student[3];

????float average[3] = {0};

????float maxAverage;

????int maxIndex;

????int i, j;

????for (i = 0; i < 3; i++) {

????????printf("请输入第 %d 个学生的学号：", i + 1);

????????scanf("%s", student[i].num);

????????printf("请输入第 %d 个学生的姓名：", i + 1);

????????scanf("%s", student[i].name);

????????printf("请输入第 %d 个学生的两门课成绩：", i + 1);

????????for (j = 0; j < 2; j++) {

????????????scanf("%f", &student[i].score[j]);

????????????average[i] += student[i].score[j];

????????}

????????average[i] /= 2;

????????printf("\n");

????}?

????printf("每个学生的平均成绩：\n");

????for (i = 0; i < 3; i++) {

????????printf("学号：%s, 平均成绩：%.2f\n", student[i].num, average[i]);

????}

????maxAverage = average[0];

????maxIndex = 0;

????for (i = 1; i < 3; i++) {

????????if (average[i] > maxAverage) {

????????????maxAverage = average[i];

????????????maxIndex = i;

????????}

????}

????printf("\n平均分最高的学生：\n");

????printf("学号：%s\n", student[maxIndex].num);

????printf("姓名：%s\n", student[maxIndex].name);

????printf("成绩：");

????for (j = 0; j < 2; j++) {

????????printf("%.2f ", student[maxIndex].score[j]);

????}

????printf("\n平均分：%.2f\n", maxAverage);

????return 0;

}

2、#include <stdio.h>

struct Student {

????int num;

????char name[20];

????float score[3];

};

void print(struct Student student) {

????printf("学号：%d\n", student.num);

????printf("姓名：%s\n", student.name);

????printf("成绩：%.2f %.2f %.2f\n", student.score[0], student.score[1], student.score[2]);

????printf("\n");

}

int main() {

????struct Student students[3];

????int i, j;

????for (i = 0; i < 3; i++) {

????????printf("请输入第 %d 个学生的学号：", i + 1);

????????scanf("%d", &students[i].num);

????????printf("请输入第 %d 个学生的姓名：", i + 1);

????????scanf("%s", students[i].name);

????????printf("请输入第 %d 个学生的三门课成绩：", i + 1);

????????for (j = 0; j < 3; j++) {

????????????scanf("%f", &students[i].score[j]);

????????}

????????printf("\n");

????}

????for (i = 0; i < 3; i++) {

????????print(students[i]);

????}

????return 0;

}