fix String to Integer (atoi)

rihib · rihib · commit add3803b948a · 2024-08-09T15:44:36.000+09:00
diff --git a/go/string_to_integer_atoi.go b/go/string_to_integer_atoi.go
@@ -24,14 +24,14 @@ func myAtoi(s string) int {
 
 	num := 0
 	for i < len(s) && '0' <= s[i] && s[i] <= '9' {
-		next := int(s[i] - '0')
-		if sign != -1 && num > (intMax-next)/10 {
+		digit := int(s[i] - '0')
+		if sign == 1 && (num > intMax/10 || num == intMax/10 && digit >= intMax%10) {
 			return intMax
 		}
-		if sign == -1 && -num < (intMin+next)/10 {
+		if sign == -1 && (-num < intMin/10 || -num == intMin/10 && -digit <= intMin%10) {
 			return intMin
 		}
-		num = num*10 + next
+		num = num*10 + digit
 		i++
 	}
 	return sign * num

Original file line number	Diff line number	Diff line change
`@@ -24,14 +24,14 @@ func myAtoi(s string) int {`
`24`	`24`
`25`	`25`	`num := 0`
`26`	`26`	`for i < len(s) && '0' <= s[i] && s[i] <= '9' {`
`27`		`- next := int(s[i] - '0')`
`28`		`- if sign != -1 && num > (intMax-next)/10 {`
	`27`	`+ digit := int(s[i] - '0')`
	`28`	`+ if sign == 1 && (num > intMax/10 \|\| num == intMax/10 && digit >= intMax%10) {`
`29`	`29`	`return intMax`
`30`	`30`	`}`
`31`		`- if sign == -1 && -num < (intMin+next)/10 {`
	`31`	`+ if sign == -1 && (-num < intMin/10 \|\| -num == intMin/10 && -digit <= intMin%10) {`
`32`	`32`	`return intMin`
`33`	`33`	`}`
`34`		`- num = num*10 + next`
	`34`	`+ num = num*10 + digit`
`35`	`35`	`i++`
`36`	`36`	`}`
`37`	`37`	`return sign * num`