定义一个结构体描述病患病历信息:病历号，姓名，年龄，性别，症状，初诊情况，就诊时间 (用一个结构体，存储时间:年月日)设计程序按病患姓名实现病患的查找。如果找到该病患信息，就在屏幕上显示出该人的所有信息，如果没有找到，则显示“查无此人“ 要求设计一个函数封装查找功能，并返回结构体指针 用C语言

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

struct Date{
    int year;
    int month;
    int day;
};

struct Patient{
    char id[20];
    char name[20];
    int age;
    char gender[10];
    char symptom[100];
    char diagnosis[100];
    struct Date visit_time;
};

struct Patient* search_patient(struct Patient* patients, int num, char* name){
    for(int i=0;i<num;i++){
        if(strcmp(patients[i].name,name)==0){
            return &patients[i];
        }
    }
    return NULL;
}

int main(){
    struct Patient patients[5]={
        {"001","John",25,"Male","Fever","Cold", {2020,9,1}},
        {"002","Lucy",30,"Female","Cough","Bronchitis",{2020,9,2}},
        {"003","Tom",45,"Male","Headache","Migraine",{2020,9,3}},
        {"004","Lily",20,"Female","Sore throat","Tonsillitis",{2020,9,4}},
        {"005","Mike",55,"Male","Chest pain","Angina",{2020,9,5}}
    };
    char name[20];
    printf("Please enter the patient name to search: ");
    scanf("%s",name);
    struct Patient* patient=search_patient(patients,5,name);
    if(patient!=NULL){
        printf("Patient ID: %s\n",patient->id);
        printf("Name: %s\n",patient->name);
        printf("Age: %d\n",patient->age);
        printf("Gender: %s\n",patient->gender);
        printf("Symptom: %s\n",patient->symptom);
        printf("Diagnosis: %s\n",patient->diagnosis);
        printf("Visit time: %d-%d-%d\n",patient->visit_time.year,patient->visit_time.month,patient->visit_time.day);
    }else{
        printf("No such patient.\n");
    }
    return 0;
}