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73 lines
1.3 KiB

package main
import (
student "student"
"lib"
)
func trimAtoi(s string) int {
runes := []rune(s)
for i := range s {
runes[i] = rune(s[i])
}
var numbers []rune
for _, r := range runes {
if (r >= '0' && r <= '9') || (len(numbers) == 0 && (r) == '-' || r == '+') {
numbers = append(numbers, r)
}
}
if len(numbers) == 0 || (len(numbers) == 1 && (numbers[0] == '-' || numbers[0] == '+')) {
return 0
}
res, i, sign := 0, 0, 1
if numbers[0] == '-' {
sign = -1
i++
} else if numbers[0] == '+' {
i++
}
for ; i < len(numbers); i++ {
res = res*10 + int(numbers[i]) - '0'
}
return sign * res
}
func stringsToTrimAtoi(a []string) []string {
alpha := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789012345678901234567890123456789"
for index := 0; index < 4; index++ {
s := ""
s += lib.RandStr(lib.RandIntBetween(0, 2), alpha)
x := lib.RandIntBetween(0, 14)
if x <= 4 {
s += "-"
}
s += lib.RandStr(lib.RandIntBetween(0, 10), alpha)
a = append(a, s)
}
return a
}
func main() {
a := []string{
"",
"12345",
"str123ing45",
"012 345",
"Hello World!",
"sd+x1fa2W3s4",
"sd-x1fa2W3s4",
"sdx1-fa2W3s4",
lib.RandAlnum(),
}
a = stringsToTrimAtoi(a)
for _, elem := range a {
lib.Challenge("TrimAtoi", student.TrimAtoi, trimAtoi, elem)
}
}
// TODO: refactor, including the subject