[golang from introduction to practice] student achievement management system

Function is introduced

1、 Student achievement system increases
2、 Student achievement system delete
3、 Student achievement system query
4、 Student achievement system modification
5、 Student achievement system information acquisition

Effect display

golang Student achievement management system

Programming ideas

1、 Defining structure ： Store the information of each student as a group
2、 Define an array ： Store student information structures

Design ： All functions of the system operate around arrays and structures

Related knowledge

Array 、 Structure 、for loop 、goto Jump 、if Conditional statements 、 Output input function

Source code

package main

import (
	"fmt"
)

var studb []stu_msg

const screen = `1、 Add student grades  2、 Delete student grades  3、 Revise student grades  4、 Check student grades  5、 Get student grades  6、 sign out `

var n string

type stu_msg struct {
    
	stuid   int
	name    string
	math    int
	english int
	golang  int
}

func main() {
    
	for {
    
		
		fmt.Println(screen)

		fmt.Print(" Please enter your choice ：")
		fmt.Scan(&n)
		switch n {
    
		case "1":
			var stu stu_msg
			fmt.Print(" Please enter id：")
			fmt.Scan(&stu.stuid)
			fmt.Print(" Please enter a name ：")
			fmt.Scan(&stu.name)
			fmt.Print(" Please enter the math ：")
			fmt.Scan(&stu.math)
			fmt.Print(" Please input English ：")
			fmt.Scan(&stu.english)
			fmt.Print(" Please enter golang：")
			fmt.Scan(&stu.golang)
			studb = append(studb, stu)
			fmt.Println(" Add success ")
		case "2":
			var id int
			fmt.Print(" Please enter the name of the student to delete ID：")
			fmt.Scan(&id)
			i := 1
			for index, v := range studb {
    
				if v.stuid == id {
    
					studb = append(studb[:index], studb[index+1:]...)
					fmt.Println(" Delete successful ")
					break
				}
				if i == len(studb) {
    
					fmt.Println(" This student was not found ！")
				}
				i++
			}
		case "3":
			var id int
			fmt.Print(" Please enter the name of the student you want to modify ID：")
			fmt.Scan(&id)
			i := 1
			for index, v := range studb {
    
				if v.stuid == id {
    
					fmt.Println("id:", v.stuid, "name:", v.name, "math:", v.math, "english:", v.english, "golang:", v.golang)
					fmt.Print(" Please enter a name ：")
					fmt.Scan(&studb[index].name)
					fmt.Print(" Please enter the math ：")
					fmt.Scan(&studb[index].math)
					fmt.Print(" Please input English ：")
					fmt.Scan(&studb[index].english)
					fmt.Print(" Please enter golang：")
					fmt.Scan(&studb[index].golang)
					fmt.Println(" Modification successful ")
					break
				} else if i == len(studb) {
    
					fmt.Println(" This student was not found ！")
				}
				i++
			}
		case "4":
			var name string
			fmt.Print(" Please enter the name of the student you want to query ：")
			fmt.Scan(&name)
			i := 1
			for _, v := range studb {
    
				if v.name == name {
    
					fmt.Println("id:", v.stuid, "name:", v.name, "math:", v.math, "english:", v.english, "golang:", v.golang)
					break
				} else if i == len(studb) {
    
					fmt.Println(" This student was not found ！")
				}
				i++
			}
		case "5":
			for _, v := range studb {
    
				fmt.Println("id:", v.stuid, "name:", v.name, "math:", v.math, "english:", v.english, "golang:", v.golang)
			}
		case "6":
			goto end
		}

	}
end:
	fmt.Println(" Quit successfully ")
}