Article Directory
Project development process
- Demand analysis (30%)
- Software design (20%)
- coding & testing (20%)
- Online release
- Later operation and maintenance
Project requirement description
- Simulate the realization of "Family Accounting Software" based on text interface
- The software can record the income and expenditure of the family, and can print the income and expenditure schedule
interface design
-----------------家庭收支记账软件-----------------
1 收支明细
2 登记收入
3 登记支出
4 退出软件
请选择(1-4)：
Code
Process-oriented implementation
- Function 1: Finish first to display the main menu and exit
Analysis of the train of thought:
After finishing the given interface, the main menu is displayed, when the user enters 4, the program will be exited
func main() {
//声明一个变量，保存接收用户输入的选项
key := ""
//声明一个变量，控制是否退出for
loop := true
for {
fmt.Println("\n-----------------家庭收支记账软件-----------------")
fmt.Println(" 1 收支明细")
fmt.Println(" 2 登记收入")
fmt.Println(" 3 登记支出")
fmt.Println(" 4 退出软件")
fmt.Print("请选择(1-4)：")
fmt.Scanln(&key)
switch key {
case "1" ：
case "2" :
case "3" :
case "4" :
fmt.Println("你确定要退出吗? y/n")
choice := ""
for {
fmt.Scanln(&choice)
if choice == "y" || choice == "n" {
break
}
fmt.Println("你的输入有误，请重新输入 y/n")
}
if choice == "y" {
loop = false
}
default :
fmt.Println("请输入正确的选项..")
}
if !loop {
break
}
}
fmt.Println("你退出家庭记账软件的使用...")
}
- Function 2: complete the function that can display details
Thinking analysis:
because we need to display details, we define a variable details string to record
func main() {
//声明一个变量，保存接收用户输入的选项
key := ""
//声明一个变量，控制是否退出for
loop := true
flag := false
//收支的详情使用字符串来记录
//当有收支时，只需要对details 进行拼接处理即可
details := "收支\t账户金额\t收支金额\t说 明"
for {
fmt.Println("\n-----------------家庭收支记账软件-----------------")
fmt.Println(" 1 收支明细")
fmt.Println(" 2 登记收入")
fmt.Println(" 3 登记支出")
fmt.Println(" 4 退出软件")
fmt.Print("请选择(1-4)：")
fmt.Scanln(&key)
switch key {
case "1" ：
fmt.Println("-----------------当前收支明细记录-----------------")
if flag {
fmt.Println(details)
} else {
fmt.Println("当前没有收支明细... 来一笔吧!")
}
case "2" :
case "3" :
case "4" :
fmt.Println("你确定要退出吗? y/n")
choice := ""
for {
fmt.Scanln(&choice)
if choice == "y" || choice == "n" {
break
}
fmt.Println("你的输入有误，请重新输入 y/n")
}
if choice == "y" {
loop = false
}
default :
fmt.Println("请输入正确的选项..")
}
if !loop {
break
}
}
fmt.Println("你退出家庭记账软件的使用...")
}
- Function 3: Complete the function of registering income and expenditure
Analysis of ideas:
Variables need to be defined to record the balance (balance), the amount of each income and expenditure (money), and the description of each income and expenditure (note)
func main() {
//声明一个变量，保存接收用户输入的选项
key := ""
//声明一个变量，控制是否退出for
loop := true
//定义账户的余额 []
balance := 10000.0
//每次收支的金额
money := 0.0
//每次收支的说明
note := ""
//定义个变量，记录是否有收支的行为
flag := false
//收支的详情使用字符串来记录
//当有收支时，只需要对details 进行拼接处理即可
details := "收支\t账户金额\t收支金额\t说 明"
for {
fmt.Println("\n-----------------家庭收支记账软件-----------------")
fmt.Println(" 1 收支明细")
fmt.Println(" 2 登记收入")
fmt.Println(" 3 登记支出")
fmt.Println(" 4 退出软件")
fmt.Print("请选择(1-4)：")
fmt.Scanln(&key)
switch key {
case "1" ：
fmt.Println("-----------------当前收支明细记录-----------------")
if flag {
fmt.Println(details)
} else {
fmt.Println("当前没有收支明细... 来一笔吧!")
}
case "2" :
fmt.Println("本次收入金额:")
fmt.Scanln(&money)
balance += money // 修改账户余额
fmt.Println("本次收入说明:")
fmt.Scanln(¬e)
//将这个收入情况，拼接到details变量
//收入 11000 1000 有人发红包
details += fmt.Sprintf("\n收入\t%v\t%v\t%v", balance, money, note)
flag = true
case "3" :
fmt.Println("本次支出金额:")
fmt.Scanln(&money)
//这里需要做一个必要的判断
if money > balance {
fmt.Println("余额的金额不足")
break
}
balance -= money
fmt.Println("本次支出说明:")
fmt.Scanln(¬e)
details += fmt.Sprintf("\n支出\t%v\t%v\t%v", balance, money, note)
flag = true
case "4" :
fmt.Println("你确定要退出吗? y/n")
choice := ""
for {
fmt.Scanln(&choice)
if choice == "y" || choice == "n" {
break
}
fmt.Println("你的输入有误，请重新输入 y/n")
}
if choice == "y" {
loop = false
}
default :
fmt.Println("请输入正确的选项..")
}
if !loop {
break
}
}
fmt.Println("你退出家庭记账软件的使用...")
}
Object-oriented implementation
Thinking analysis:
- Encapsulate the function of the accounting software into a structure, and then call the method of the structure to realize accounting and display the details. The name of the structure FamilyAccount.
type FamilyAccount struct {
//声明必须的字段.
//声明一个字段，保存接收用户输入的选项
key string
//声明一个字段，控制是否退出for
loop bool
//定义账户的余额 []
balance float64
//每次收支的金额
money float64
//每次收支的说明
note string
//定义个字段，记录是否有收支的行为
flag bool
//收支的详情使用字符串来记录
//当有收支时，只需要对details 进行拼接处理即可
details string
}
//编写要给工厂模式的构造方法，返回一个*FamilyAccount实例
func NewFamilyAccount() *FamilyAccount {
return &FamilyAccount{
key : "",
loop : true,
balance : 10000.0,
money : 0.0,
note : "",
flag : false,
details : "收支\t账户金额\t收支金额\t说 明",
}
}
//将显示明细写成一个方法
func (this *FamilyAccount) showDetails() {
fmt.Println("-----------------当前收支明细记录-----------------")
if this.flag {
fmt.Println(this.details)
} else {
fmt.Println("当前没有收支明细... 来一笔吧!")
}
}
//将登记收入写成一个方法，和*FamilyAccount绑定
func (this *FamilyAccount) income() {
fmt.Println("本次收入金额:")
fmt.Scanln(&this.money)
this.balance += this.money // 修改账户余额
fmt.Println("本次收入说明:")
fmt.Scanln(&this.note)
//将这个收入情况，拼接到details变量
//收入 11000 1000 有人发红包
this.details += fmt.Sprintf("\n收入\t%v\t%v\t%v", this.balance, this.money, this.note)
this.flag = true
}
//将登记支出写成一个方法，和*FamilyAccount绑定
func (this *FamilyAccount) pay() {
fmt.Println("本次支出金额:")
fmt.Scanln(&this.money)
//这里需要做一个必要的判断
if this.money > this.balance {
fmt.Println("余额的金额不足")
//break
}
this.balance -= this.money
fmt.Println("本次支出说明:")
fmt.Scanln(&this.note)
this.details += fmt.Sprintf("\n支出\t%v\t%v\t%v", this.balance, this.money, this.note)
this.flag = true
}
//将退出系统写成一个方法,和*FamilyAccount绑定
func (this *FamilyAccount) exit() {
fmt.Println("你确定要退出吗? y/n")
choice := ""
for {
fmt.Scanln(&choice)
if choice == "y" || choice == "n" {
break
}
fmt.Println("你的输入有误，请重新输入 y/n")
}
if choice == "y" {
this.loop = false
}
}
//给该结构体绑定相应的方法
//显示主菜单
func (this *FamilyAccount) MainMenu() {
for {
fmt.Println("\n-----------------家庭收支记账软件-----------------")
fmt.Println(" 1 收支明细")
fmt.Println(" 2 登记收入")
fmt.Println(" 3 登记支出")
fmt.Println(" 4 退出软件")
fmt.Print("请选择(1-4)：")
fmt.Scanln(&this.key)
switch this.key {
case "1":
this.showDetails()
case "2":
this.income()
case "3":
this.pay()
case "4":
this.exit()
default :
fmt.Println("请输入正确的选项..")
}
if !this.loop {
break
}
}
}
2. In the main method, create an instance of the structure FamilyAccount to realize accounting.
package main
import (
"familyaccount/utils"
"fmt"
)
func main() {
utils.NewFamilyAccount().MainMenu()
}