#include<stdio.h> #include<string.h> #define N 10 typedef struct date { int year; int month; int day; }DATE; typedef struct student { int num; char name[20]; char sex; DATE birthday; float score; }STUDENT; void input(STUDENT *s); void output(STUDENT s); void outputarr(STUDENT s[ ], int n); int equal (STUDENT a, STUDENT b) ; int serach(STUDENT a[],int n,STUDENT x); int main() { STUDENT b[N]={ {10010,"Liyi",'M',2000,5,23,45}, {10020,"Lier",'M',2001,2,3,62.5}, {10030,"Lisan",'F',2000,10,14,92.5}, {10040,"Lisi",'F',2002,7,23,87}, {10050,"Liwu",'M',1999,8,6,78} }; STUDENT x; int n = 0; //printf("请输入查找的学生信息：\n"); input(&x); n = serach(b,5,x); outputarr(b,5); if(n>=0) { printf("查找成功，是第%d个学生，该学生信息如下：\n",n+1); output(b[n]); } else { printf("查无此人。\n"); } return 0; } void input(STUDENT *s) { //printf("请输入学生学号:"); scanf("%d",&(*s).num); //printf("请输入学生姓名:"); scanf("%s",(*s).name); //printf("请输入学生性别:"); scanf(" %c",&(*s).sex); //printf("请输入学生出生日期:"); scanf("%d%d%d",&(*s).birthday.year,& (*s).birthday.month, &(*s).birthday.day); //printf("请输入学生成绩:"); scanf("%f",&(*s).score); } void output(STUDENT s) { printf("学号:%d\t姓名:%s\t性别:%c\t", s.num,s.name,s.sex); printf("出生日期:%d-%d-%d\t", s.birthday.year,s.birthday.month, s.birthday.day); printf("成绩:%.1f\n", s.score); } void outputarr(STUDENT s[],int n) { } int equal (STUDENT a, STUDENT b) { } int serach(STUDENT a[],int n,STUDENT x) { } 完成此代码

这段代码是一个学生信息管理系统，包含了学生的学号、姓名、性别、出生日期和成绩等信息。主函数中定义了一个学生数组b，包含了5个学生的信息，然后调用了serach函数进行查询，查询结果将会输出在屏幕上。serach函数用于在学生数组中查找指定的学生信息，如果找到了就返回该学生在数组中的下标，否则返回-1。

下面是完整代码：

#include<stdio.h> 
#include<string.h> 
#define N 10

typedef struct date {
    int year;
    int month;
    int day;
} DATE;

typedef struct student {
    int num;
    char name[20];
    char sex;
    DATE birthday;
    float score;
} STUDENT;

void input(STUDENT *s);
void output(STUDENT s);
void outputarr(STUDENT s[], int n);
int equal(STUDENT a, STUDENT b);
int serach(STUDENT a[], int n, STUDENT x);

int main() {
    STUDENT b[N] = {
        {10010, "Liyi", 'M', 2000, 5, 23, 45},
        {10020, "Lier", 'M', 2001, 2, 3, 62.5},
        {10030, "Lisan", 'F', 2000, 10, 14, 92.5},
        {10040, "Lisi", 'F', 2002, 7, 23, 87},
        {10050, "Liwu", 'M', 1999, 8, 6, 78}
    };
    STUDENT x;
    int n = 0;
    printf("请输入查找的学生信息：\n");
    input(&x);
    n = serach(b, 5, x);
    outputarr(b, 5);
    if(n >= 0) {
        printf("查找成功，是第%d个学生，该学生信息如下：\n", n + 1);
        output(b[n]);
    } else {
        printf("查无此人。\n");
    }
    return 0;
}

void input(STUDENT *s) {
    printf("请输入学生学号:");
    scanf("%d", &(*s).num);
    printf("请输入学生姓名:");
    scanf("%s", (*s).name);
    printf("请输入学生性别:");
    scanf(" %c", &(*s).sex);
    printf("请输入学生出生日期:");
    scanf("%d%d%d", &(*s).birthday.year, &(*s).birthday.month, &(*s).birthday.day);
    printf("请输入学生成绩:");
    scanf("%f", &(*s).score);
}

void output(STUDENT s) {
    printf("学号:%d\t姓名:%s\t性别:%c\t", s.num, s.name, s.sex);
    printf("出生日期:%d-%d-%d\t", s.birthday.year, s.birthday.month, s.birthday.day);
    printf("成绩:%.1f\n", s.score);
}

void outputarr(STUDENT s[], int n) {
    printf("学号\t姓名\t性别\t出生日期\t成绩\n");
    for(int i = 0; i < n; i++) {
        printf("%d\t%s\t%c\t%d-%d-%d\t%.1f\n", s[i].num, s[i].name, s[i].sex, s[i].birthday.year, s[i].birthday.month, s[i].birthday.day, s[i].score);
    }
}

int equal(STUDENT a, STUDENT b) {
    if(a.num == b.num && strcmp(a.name, b.name) == 0 && a.sex == b.sex && a.birthday.year == b.birthday.year && a.birthday.month == b.birthday.month && a.birthday.day == b.birthday.day && a.score == b.score) {
        return 1;
    } else {
        return 0;
    }
}

int serach(STUDENT a[], int n, STUDENT x) {
    for(int i = 0; i < n; i++) {
        if(equal(a[i], x)) {
            return i;
        }
    }
    return -1;
}