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80 lines
1.1 KiB
80 lines
1.1 KiB
package main |
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import ( |
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"strings" |
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) |
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func ContainsPlusMinus(s string) bool { |
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for _, c := range s { |
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if c == '+' || c == '-' { |
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return true |
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} |
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} |
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return false |
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} |
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func UniqueChar(s string) bool { |
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r := []rune(s) |
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n := len(r) |
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for i := 0; i < n-1; i++ { |
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if InStr(r[i], s[i+1:n]) { |
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return false |
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} |
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} |
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return true |
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} |
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func InStr(c rune, s string) bool { |
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for _, r := range s { |
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if c == r { |
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return true |
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} |
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} |
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return false |
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} |
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func ValidBase(base string) bool { |
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return len(base) >= 2 && !ContainsPlusMinus(base) && UniqueChar(base) |
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} |
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func Power(nbr int, pwr int) int { |
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if pwr == 0 { |
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return 1 |
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} |
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if pwr == 1 { |
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return nbr |
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} |
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return nbr * Power(nbr, pwr-1) |
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} |
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func Index(s string, toFind string) int { |
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result := strings.Index(s, toFind) |
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return result |
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} |
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func AtoiBase(s string, base string) int { |
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var result int |
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var i int |
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sign := 1 |
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lengthBase := len(base) |
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lengths := len(s) |
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if !ValidBase(base) { |
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return 0 |
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} |
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if s[i] == '-' { |
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sign = -1 |
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} |
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if s[i] == '-' || s[i] == '+' { |
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i++ |
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} |
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for i < len(s) { |
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result = result + (Index(base, string(s[i])) * Power(lengthBase, lengths-1)) |
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i++ |
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lengths-- |
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} |
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return result * sign |
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} |
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func main() { |
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}
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