程序代码：

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

typedef struct Student Student;
    struct Student
    {
        int math_grade;
        int chinese_grade;
        int english_grade;
        char student_name[];
    };
    int main()
    {
        Student studentA;
        Student studentB;
        Student studentC;
        //引导输入第一个学生的数据。
        printf("请输入第一个学生的名字：");
        scanf("%s",studentA.student_name);
        printf("\n");
        printf("请输入%s的数学成绩:",studentA.student_name);
        scanf("%d",&studentA.math_grade);
        printf("\n");
        printf("请输入%s的语文成绩：",studentA.student_name);
        scanf("%d",&studentA.chinese_grade);
        printf("\n");
        printf("请输入%s的英语成绩：",studentA.student_name);
        scanf("%d",&studentA.english_grade);
        printf("%d %d %d",studentA.math_grade,studentA.chinese_grade,studentA.english_grade);
        printf("\n");
        //引导输入第二个学生的数据。
        printf("请输入第二个学生的名字：");
        scanf("%s",studentB.student_name);
        printf("\n");
        printf("请输入%s的数学成绩:",studentB.student_name);
        scanf("%d",&studentB.math_grade);
        printf("\n");
        printf("请输入%s的语文成绩：",studentB.student_name);
        scanf("%d",&studentB.chinese_grade);
        printf("\n");
        printf("请输入%s的英语成绩：",studentB.student_name);
        scanf("%d",&studentB.english_grade);
        printf("%d %d %d",studentB.math_grade,studentB.chinese_grade,studentB.english_grade);
        printf("\n");
        //引导输入第三个学生的数据。
        printf("\n");
        printf("请输入第三个学生的名字：");
        scanf("%s",studentC.student_name);
        printf("\n");
        printf("请输入%s的数学成绩:",studentC.student_name);
        scanf("%d",&studentC.math_grade);
        printf("\n");
        printf("请输入%s的语文成绩：",studentC.student_name);
        scanf("%d",&studentC.chinese_grade);
        printf("\n");
        printf("请输入%s的英语成绩：",studentC.student_name);
        scanf("%d",&studentC.english_grade);
        printf("%d %d %d",studentC.math_grade,studentC.chinese_grade,studentC.english_grade);
        printf("\n");
        printf("下面输出成绩单：\n");
        putchar(10);
        //输出成绩单。
        printf("姓名\t数学\t语文\t英语\t\n");
        printf("%s\t%d\t%d\t\n",studentA.student_name,studentA.math_grade,studentA.chinese_grade,studentA.english_grade);
        printf("%s\t%d\t%d\t\n",studentB.student_name,studentB.math_grade,studentB.chinese_grade,studentB.english_grade);
        printf("%s\t%d\t%d\t\n",studentC.student_name,studentC.math_grade,studentC.chinese_grade,studentC.english_grade);
        system("pause");
        return 0;
    }