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main.go
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main.go
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package main
import (
"fmt"
"strconv"
"strings"
)
func main() {
fmt.Println(compareVersion("1.0.0.1", "1.0"))
fmt.Println(compareVersion("1.0.0.1", "1.0.1"))
}
func compareVersion1(version1 string, version2 string) int {
v1 := strings.Split(version1, ".")
v2 := strings.Split(version2, ".")
l1 := len(v1)
l2 := len(v2)
start := 0
for start < l1 && start < l2 {
n1, _ := strconv.ParseInt(v1[start], 10, 32)
n2, _ := strconv.ParseInt(v2[start], 10, 32)
if n1 > n2 {
return 1
} else if n1 < n2 {
return -1
}
start++
}
for start < l1 {
n1, _ := strconv.ParseInt(v1[start], 10, 32)
if n1 > 0 {
return 1
}
start++
}
for start < l2 {
n2, _ := strconv.ParseInt(v2[start], 10, 32)
if n2 > 0 {
return -1
}
start++
}
return 0
}
// 1.01.1.1
// 1.01.2
func compareVersion(version1 string, version2 string) int {
l1 := len(version1)
l2 := len(version2)
i, j := 0, 0
for i < l1 || j < l2 {
num1 := 0
for i < l1 && version1[i] != '.' {
num1 = num1*10 + int(version1[i]-'0')
i++
}
num2 := 0
for j < l2 && version2[j] != '.' {
num2 = num2*10 + int(version2[j]-'0')
j++
}
if num1 > num2 {
return 1
} else if num1 < num2 {
return -1
}
i++
j++
}
return 0
}