第一个模块——主函数main()的功能是：根据选单的选项调用各函数，并完成相应的功能。 第二个模块——Menu()的功能是：显示提示选单。 第三个模块——Quit()的功能是：退出选单。 第四个模块——Create()的功能是：创建新的数据记录。 第五个模块——Add()的功能是：增加新的数据记录，并返回选单。 第六个模块——Find()的功能是：按要求查询相关的信息，如果找到了，则显示该信息，如果未找到，则提示文件中没有该信息，并返回选单。 第七个模块——Alter()[的功能是：修改某条记录的信息，如果未找到要修改的记录，则提示系统中无此记录，并返回选单。 第八个模块——Delete()的功能是：删除某条记录，如果未找到要删除的记录，则提示通讯录中没有，并返回选单。 第九个模块——List()的功能是：显示所有记录。 通讯者信息包括：编号（char num[10]）、姓名(char name[10])、性别(char sex[10])、电话(char phone[20])、公司名称（char address[50]） （2）除了总的模块要求外，还需a.统计通讯录中男女比例；b.显示出同一公司中的人的信息。用C语言编写代码

好的，以下是一个简单的通讯录程序，包括了你所要求的所有模块和任务：

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

#define MAX_RECORDS 1000

typedef struct {
    char num[10];
    char name[10];
    char sex[10];
    char phone[20];
    char address[50];
} Record;

Record records[MAX_RECORDS];
int num_records = 0;

void Menu();
void Quit();
void Create();
void Add();
void Find();
void Alter();
void Delete();
void List();
void Statistic();
void GroupByAddress();

int main() {
    Menu();
    return 0;
}

void Menu() {
    int choice;
    while (1) {
        printf("\n");
        printf("1. Create new record\n");
        printf("2. Add new record\n");
        printf("3. Find record\n");
        printf("4. Alter record\n");
        printf("5. Delete record\n");
        printf("6. List all records\n");
        printf("7. Show gender statistics\n");
        printf("8. Group records by company\n");
        printf("9. Quit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                Create();
                break;
            case 2:
                Add();
                break;
            case 3:
                Find();
                break;
            case 4:
                Alter();
                break;
            case 5:
                Delete();
                break;
            case 6:
                List();
                break;
            case 7:
                Statistic();
                break;
            case 8:
                GroupByAddress();
                break;
            case 9:
                Quit();
                return;
            default:
                printf("Invalid choice!\n");
                break;
        }
    }
}

void Quit() {
    printf("Goodbye!\n");
    exit(0);
}

void Create() {
    Record record;
    printf("Enter the record information:\n");
    printf("Num: ");
    scanf("%s", record.num);
    printf("Name: ");
    scanf("%s", record.name);
    printf("Sex: ");
    scanf("%s", record.sex);
    printf("Phone: ");
    scanf("%s", record.phone);
    printf("Address: ");
    scanf("%s", record.address);
    records[0] = record;
    num_records = 1;
    printf("Record created successfully!\n");
}

void Add() {
    if (num_records >= MAX_RECORDS) {
        printf("Cannot add more records!\n");
        return;
    }
    Record record;
    printf("Enter the record information:\n");
    printf("Num: ");
    scanf("%s", record.num);
    printf("Name: ");
    scanf("%s", record.name);
    printf("Sex: ");
    scanf("%s", record.sex);
    printf("Phone: ");
    scanf("%s", record.phone);
    printf("Address: ");
    scanf("%s", record.address);
    records[num_records] = record;
    num_records++;
    printf("Record added successfully!\n");
}

void Find() {
    char keyword[50];
    printf("Enter the keyword to search: ");
    scanf("%s", keyword);
    int found = 0;
    for (int i = 0; i < num_records; i++) {
        if (strstr(records[i].num, keyword) || strstr(records[i].name, keyword) 
            || strstr(records[i].sex, keyword) || strstr(records[i].phone, keyword) 
            || strstr(records[i].address, keyword)) {
            printf("Record found:\n");
            printf("Num: %s\n", records[i].num);
            printf("Name: %s\n", records[i].name);
            printf("Sex: %s\n", records[i].sex);
            printf("Phone: %s\n", records[i].phone);
            printf("Address: %s\n", records[i].address);
            found = 1;
        }
    }
    if (!found) {
        printf("No record found!\n");
    }
}

void Alter() {
    char keyword[50];
    printf("Enter the keyword to search: ");
    scanf("%s", keyword);
    int found = 0;
    for (int i = 0; i < num_records; i++) {
        if (strstr(records[i].num, keyword) || strstr(records[i].name, keyword) 
            || strstr(records[i].sex, keyword) || strstr(records[i].phone, keyword) 
            || strstr(records[i].address, keyword)) {
            printf("Enter the new record information:\n");
            printf("Num: ");
            scanf("%s", records[i].num);
            printf("Name: ");
            scanf("%s", records[i].name);
            printf("Sex: ");
            scanf("%s", records[i].sex);
            printf("Phone: ");
            scanf("%s", records[i].phone);
            printf("Address: ");
            scanf("%s", records[i].address);
            printf("Record altered successfully!\n");
            found = 1;
        }
    }
    if (!found) {
        printf("No record found!\n");
    }
}

void Delete() {
    char keyword[50];
    printf("Enter the keyword to search: ");
    scanf("%s", keyword);
    int found = 0;
    for (int i = 0; i < num_records; i++) {
        if (strstr(records[i].num, keyword) || strstr(records[i].name, keyword) 
            || strstr(records[i].sex, keyword) || strstr(records[i].phone, keyword) 
            || strstr(records[i].address, keyword)) {
            for (int j = i; j < num_records - 1; j++) {
                records[j] = records[j + 1];
            }
            num_records--;
            printf("Record deleted successfully!\n");
            found = 1;
            break;
        }
    }
    if (!found) {
        printf("No record found!\n");
    }
}

void List() {
    printf("All records:\n");
    for (int i = 0; i < num_records; i++) {
        printf("%s\t%s\t%s\t%s\t%s\n", records[i].num, records[i].name, 
               records[i].sex, records[i].phone, records[i].address);
    }
}

void Statistic() {
    int num_male = 0, num_female = 0;
    for (int i = 0; i < num_records; i++) {
        if (strcmp(records[i].sex, "male") == 0) {
            num_male++;
        } else {
            num_female++;
        }
    }
    printf("Gender statistics:\n");
    printf("Male: %d\n", num_male);
    printf("Female: %d\n", num_female);
}

void GroupByAddress() {
    char addresses[MAX_RECORDS][50];
    int num_addresses = 0;
    for (int i = 0; i < num_records; i++) {
        int found = 0;
        for (int j = 0; j < num_addresses; j++) {
            if (strcmp(addresses[j], records[i].address) == 0) {
                found = 1;
                break;
            }
        }
        if (!found) {
            strcpy(addresses[num_addresses], records[i].address);
            num_addresses++;
        }
    }
    for (int i = 0; i < num_addresses; i++) {
        printf("Records in %s:\n", addresses[i]);
        for (int j = 0; j < num_records; j++) {
            if (strcmp(records[j].address, addresses[i]) == 0) {
                printf("%s\t%s\t%s\t%s\t%s\n", records[j].num, records[j].name, 
                       records[j].sex, records[j].phone, records[j].address);
            }
        }
    }
}

上述程序中，我们用Record结构体来存储每条记录的信息，并使用一个数组来存储所有记录。 num_records变量用于记录当前存储的记录数。我们使用一个循环来显示菜单，根据用户的选择来调用相应的函数实现相应的功能。

Create()函数用于创建第一条记录，Add()函数用于在已有记录的基础上添加新的记录。Find()函数用于按照关键字查找记录，并显示找到的记录信息。Alter()函数用于修改记录信息。Delete()函数用于删除记录。List()函数用于显示所有记录。

Statistic()函数用于统计男女比例，GroupByAddress()函数用于按公司分组显示记录。

这个程序是一个简单的通讯录程序，可以根据需要进行扩展和改进。