嵌入式设计linux

Question

请用C语言编写主程序程序,在虚i拟机调试，题目如下图，请按题目要求编写，并给出程序

Answer 1

基于Monster 组和GPT的调写：
1.

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

int main()
{
    // 打开File.txt文件进行读取
    FILE *fp;
    fp = fopen("File.txt", "r");
    if (fp == NULL) {
        printf("Failed to open file.\n");
        return -1;
    }

    // 统计各个字符类型的数量
    int upper_count = 0;
    int lower_count = 0;
    int digit_count = 0;
    char c;
    while ((c = fgetc(fp)) != EOF) {
        if (c >= 'A' && c <= 'Z') {
            upper_count++;
        } else if (c >= 'a' && c <= 'z') {
            lower_count++;
        } else if (c >= '0' && c <= '9') {
            digit_count++;
        }
    }

    // 关闭File.txt文件
    fclose(fp);

    // 将读取的内容和统计数据写入新文件
    char student_info[50] = "5dLe63 Zhang San.txt";
    fp = fopen(student_info, "w");
    if (fp == NULL) {
        printf("Failed to create new file.\n");
        return -1;
    }

    // 打开File.txt文件进行读取
    fp = fopen("File.txt", "r");
    if (fp == NULL) {
        printf("Failed to open file.\n");
        return -1;
    }

    // 将File.txt文件的内容写入新文件
    while ((c = fgetc(fp)) != EOF) {
        fputc(c, fp);
    }

    // 将统计数据写入新文件
    fprintf(fp, "\ncapital letter:%d small letter:%d\n", upper_count, lower_count);
    fprintf(fp, "number letter:%d\n", digit_count);

    // 关闭File.txt和新文件
    fclose(fp);

    return 0;
}

2.

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

#define MAX_PRODUCTS 100 // 定义最大商品数量

typedef struct Product {
    char name[100];
    double price;
    int quantity;
} Product;

void print_product(Product p) {
    printf("%s\t%.2lf\t%d\n", p.name, p.price, p.quantity);
}

void read_products(Product products[], int *count) {
    FILE *fp;
    fp = fopen("a.txt", "r"); // 打开文件

    if (fp == NULL) {
        printf("Failed to open file\n");
        exit(1);
    }

    char line[100];
    char *token;

    while (fgets(line, sizeof(line), fp) != NULL) {
        Product p;
        token = strtok(line, ",");
        strcpy(p.name, token);
        token = strtok(NULL, ",");
        p.price = atof(token);
        token = strtok(NULL, ",");
        p.quantity = atoi(token);
        products[*count] = p;
        (*count)++;
    }

    fclose(fp);
}

double calculate_total_price(Product products[], int count) {
    double total = 0;
    for (int i = 0; i < count; i++) {
        total += products[i].price * products[i].quantity;
    }
    return total;
}

void write_products(Product products[], int count) {
    FILE *fp;
    fp = fopen("a.txt", "a"); // 打开文件，添加内容

    if (fp == NULL) {
        printf("Failed to open file\n");
        exit(1);
    }

    for (int i = 0; i < count; i++) {
        fprintf(fp, "%s,%.2lf,%d\n", products[i].name, products[i].price, products[i].quantity);
    }

    fclose(fp);
}

void add_product(Product products[], int *count) {
    Product p;
    printf("Enter product name: ");
    scanf("%s", p.name);
    printf("Enter product price: ");
    scanf("%lf", &p.price);
    printf("Enter product quantity: ");
    scanf("%d", &p.quantity);
    products[*count] = p;
    (*count)++;
}

int main() {
    Product products[MAX_PRODUCTS];
    int count = 0;

    read_products(products, &count);

    double total_price = calculate_total_price(products, count);
    printf("Total price: %.2lf\n", total_price);

    int choice;
    printf("1. Add product\n");
    printf("2. Exit\n");
    scanf("%d", &choice);

    if (choice == 1) {
        add_product(products, &count);
        write_products(products, count);
        total_price = calculate_total_price(products, count);
        printf("Total price: %.2lf\n", total_price);
    }

    return 0;
}

3.

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

struct Employee {
    int id;
    char name[20];
    int age;
    float salary;
};

void input_employee_data(struct Employee *employee) {
    printf("请输入员工号码：");
    scanf("%d", &employee->id);
    printf("请输入员工姓名：");
    scanf("%s", employee->name);
    printf("请输入员工年龄：");
    scanf("%d", &employee->age);
    printf("请输入员工工资：");
    scanf("%f", &employee->salary);
}

void save_employee_data(FILE *file, struct Employee *employee) {
    fprintf(file, "%d %s %d %.2f\n", employee->id, employee->name, employee->age, employee->salary);
}

void print_employee_data(struct Employee *employee) {
    printf("%d %s %d %.2f\n", employee->id, employee->name, employee->age, employee->salary);
}

int main() {
    FILE *file = fopen("f1.dat", "a+");
    if (file == NULL) {
        printf("打开文件失败");
        return 1;
    }

    struct Employee employee;
    char choice = 'y';
    while (choice == 'y') {
        input_employee_data(&employee);
        save_employee_data(file, &employee);

        printf("是否继续输入员工信息（y/n）？");
        scanf(" %c", &choice);
    }

    rewind(file);

    printf("所有员工信息如下：\n");
    while (fscanf(file, "%d %s %d %f", &employee.id, employee.name, &employee.age, &employee.salary) != EOF) {
        print_employee_data(&employee);
    }

    fclose(file);

    return 0;
}