title: Golang 不同格式輸出九九乘法表
date: 2022-05-18 14:33:00
toc: false
index_img: https://b3logfile.com/file/2022/05/image-bc047597.png
category:
- Go
tags: - Go
- go
- Golang
- golang
- 格式
- 輸出
package main
import (
"fmt"
"strings"
)
func style0() {
m := make(map[int][]string, 9)
for i := 1; i < 10; i++ {
for j := i; j < 10; j++ {
str := fmt.Sprintf("%d * %d = %2d\t", i, j, i*j)
s, ok := m[i]
if !ok {
m[i] = []string{str}
} else {
m[i] = append(s, str)
}
}
}
for i := 0; i < 9; i++ {
for j := 1; j < 10-i; j++ {
fmt.Print(m[j][i])
}
fmt.Println()
}
}
func style1() {
m := make(map[int][]string, 9)
for i := 1; i < 10; i++ {
for j := i; j < 10; j++ {
str := fmt.Sprintf("%d * %d = %2d\t", i, j, i*j)
s, ok := m[i]
if !ok {
m[i] = []string{str}
} else {
m[i] = append(s, str)
}
}
}
for i := 0; i < 9; i++ {
var placeholder []string
for k := 0; k < i; k++ {
placeholder = append(placeholder, fmt.Sprint(" \t"))
}
fmt.Print(strings.Join(placeholder, ""))
for j := 9 - i; j > 0; j-- {
fmt.Print(m[j][i])
}
fmt.Println()
}
}
func style2() {
for i := 1; i < 10; i++ {
for j := i; j < 10; j++ {
str := fmt.Sprintf("%d * %d = %2d\t", i, j, i*j)
fmt.Print(str)
}
fmt.Println()
}
}
func style3() {
for i := 1; i < 10; i++ {
var placeholder []string
for k := 1; k < i; k++ {
placeholder = append(placeholder, fmt.Sprint(" \t"))
}
fmt.Print(strings.Join(placeholder, ""))
for j := 9; j >= i; j-- {
str := fmt.Sprintf("%d * %d = %2d\t", i, j, i*j)
fmt.Print(str)
}
fmt.Println()
}
}
// 九九乘法表，4種輸出格式
func main() {
style0()
style1()
style2()
style3()
}
運行結果：
1 * 1 = 1 2 * 2 = 4 3 * 3 = 9 4 * 4 = 16 5 * 5 = 25 6 * 6 = 36 7 * 7 = 49 8 * 8 = 64 9 * 9 = 81
1 * 2 = 2 2 * 3 = 6 3 * 4 = 12 4 * 5 = 20 5 * 6 = 30 6 * 7 = 42 7 * 8 = 56 8 * 9 = 72
1 * 3 = 3 2 * 4 = 8 3 * 5 = 15 4 * 6 = 24 5 * 7 = 35 6 * 8 = 48 7 * 9 = 63
1 * 4 = 4 2 * 5 = 10 3 * 6 = 18 4 * 7 = 28 5 * 8 = 40 6 * 9 = 54
1 * 5 = 5 2 * 6 = 12 3 * 7 = 21 4 * 8 = 32 5 * 9 = 45
1 * 6 = 6 2 * 7 = 14 3 * 8 = 24 4 * 9 = 36
1 * 7 = 7 2 * 8 = 16 3 * 9 = 27
1 * 8 = 8 2 * 9 = 18
1 * 9 = 9
9 * 9 = 81 8 * 8 = 64 7 * 7 = 49 6 * 6 = 36 5 * 5 = 25 4 * 4 = 16 3 * 3 = 9 2 * 2 = 4 1 * 1 = 1
8 * 9 = 72 7 * 8 = 56 6 * 7 = 42 5 * 6 = 30 4 * 5 = 20 3 * 4 = 12 2 * 3 = 6 1 * 2 = 2
7 * 9 = 63 6 * 8 = 48 5 * 7 = 35 4 * 6 = 24 3 * 5 = 15 2 * 4 = 8 1 * 3 = 3
6 * 9 = 54 5 * 8 = 40 4 * 7 = 28 3 * 6 = 18 2 * 5 = 10 1 * 4 = 4
5 * 9 = 45 4 * 8 = 32 3 * 7 = 21 2 * 6 = 12 1 * 5 = 5
4 * 9 = 36 3 * 8 = 24 2 * 7 = 14 1 * 6 = 6
3 * 9 = 27 2 * 8 = 16 1 * 7 = 7
2 * 9 = 18 1 * 8 = 8
1 * 9 = 9
1 * 1 = 1 1 * 2 = 2 1 * 3 = 3 1 * 4 = 4 1 * 5 = 5 1 * 6 = 6 1 * 7 = 7 1 * 8 = 8 1 * 9 = 9
2 * 2 = 4 2 * 3 = 6 2 * 4 = 8 2 * 5 = 10 2 * 6 = 12 2 * 7 = 14 2 * 8 = 16 2 * 9 = 18
3 * 3 = 9 3 * 4 = 12 3 * 5 = 15 3 * 6 = 18 3 * 7 = 21 3 * 8 = 24 3 * 9 = 27
4 * 4 = 16 4 * 5 = 20 4 * 6 = 24 4 * 7 = 28 4 * 8 = 32 4 * 9 = 36
5 * 5 = 25 5 * 6 = 30 5 * 7 = 35 5 * 8 = 40 5 * 9 = 45
6 * 6 = 36 6 * 7 = 42 6 * 8 = 48 6 * 9 = 54
7 * 7 = 49 7 * 8 = 56 7 * 9 = 63
8 * 8 = 64 8 * 9 = 72
9 * 9 = 81
1 * 9 = 9 1 * 8 = 8 1 * 7 = 7 1 * 6 = 6 1 * 5 = 5 1 * 4 = 4 1 * 3 = 3 1 * 2 = 2 1 * 1 = 1
2 * 9 = 18 2 * 8 = 16 2 * 7 = 14 2 * 6 = 12 2 * 5 = 10 2 * 4 = 8 2 * 3 = 6 2 * 2 = 4
3 * 9 = 27 3 * 8 = 24 3 * 7 = 21 3 * 6 = 18 3 * 5 = 15 3 * 4 = 12 3 * 3 = 9
4 * 9 = 36 4 * 8 = 32 4 * 7 = 28 4 * 6 = 24 4 * 5 = 20 4 * 4 = 16
5 * 9 = 45 5 * 8 = 40 5 * 7 = 35 5 * 6 = 30 5 * 5 = 25
6 * 9 = 54 6 * 8 = 48 6 * 7 = 42 6 * 6 = 36
7 * 9 = 63 7 * 8 = 56 7 * 7 = 49
8 * 9 = 72 8 * 8 = 64
9 * 9 = 81