输入一个三位数，计算该数各位上的数字之和，如果在[1, 12]之内，则输出与数字之和相对应的月份的英文单词，否则输出***。要求：用指针数组记录各月份英文单词的首地址，且不得使用全局变量。目前仅完成了main函数和bizProcess函数，请编程实现hundredsDigit函数、tensDigit函数、unitsDigit函数、searchMonth函数和getNumber函数

好的，我来给您完成这个程序。首先是头文件和main函数的框架：

#include <iostream>
#include <cstring>
using namespace std;

void bizProcess(int num);

void hundredsDigit(int num, int* hundreds);
void tensDigit(int num, int* tens);
void unitsDigit(int num, int* units);
int searchMonth(int sum, const char* monthName[]);
int getNumber();

int main() {
    int num = getNumber();
    bizProcess(num);
    return 0;
}

接下来是hundredsDigit、tensDigit和unitsDigit函数的实现：

void hundredsDigit(int num, int* hundreds) {
    *hundreds = num / 100;
}

void tensDigit(int num, int* tens) {
    *tens = (num / 10) % 10;
}

void unitsDigit(int num, int* units) {
    *units = num % 10;
}

然后是searchMonth函数，使用指针数组存储月份名称的首地址，并依次比较得到对应的月份名称：

int searchMonth(int sum, const char* monthName[]) {
    if (sum >= 1 && sum <= 12) {
        const char* month[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
        for (int i = 0; i < 12; i++) {
            if (i + 1 == sum) {
                *monthName = month[i];
                return 1;
            }
        }
    }
    return 0;
}

最后是getNumber函数，用于获取用户输入的三位数：

int getNumber() {
    int num;
    cout << "Please enter a three-digit number: ";
    cin >> num;
    while (num < 100 || num > 999) {
        cout << "Invalid input, please enter a three-digit number: ";
        cin >> num;
    }
    return num;
}

完整代码如下：

#include <iostream>
#include <cstring>
using namespace std;

void bizProcess(int num);

void hundredsDigit(int num, int* hundreds);
void tensDigit(int num, int* tens);
void unitsDigit(int num, int* units);
int searchMonth(int sum, const char* monthName[]);
int getNumber();

int main() {
    int num = getNumber();
    bizProcess(num);
    return 0;
}

void bizProcess(int num) {
    int hundreds, tens, units;
    const char* monthName;
    hundredsDigit(num, &hundreds);
    tensDigit(num, &tens);
    unitsDigit(num, &units);
    int sum = hundreds + tens + units;
    if (searchMonth(sum, &monthName)) {
        cout << "The month is " << monthName << endl;
    } else {
        cout << "***" << endl;
    }
}

void hundredsDigit(int num, int* hundreds) {
    *hundreds = num / 100;
}

void tensDigit(int num, int* tens) {
    *tens = (num / 10) % 10;
}

void unitsDigit(int num, int* units) {
    *units = num % 10;
}

int searchMonth(int sum, const char* monthName[]) {
    if (sum >= 1 && sum <= 12) {
        const char* month[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
        for (int i = 0; i < 12; i++) {
            if (i + 1 == sum) {
                *monthName = month[i];
                return 1;
            }
        }
    }
    return 0;
}

int getNumber() {
    int num;
    cout << "Please enter a three-digit number: ";
    cin >> num;
    while (num < 100 || num > 999) {
        cout << "Invalid input, please enter a three-digit number: ";
        cin >> num;
    }
    return num;
}