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| func discountPrices(sentence string, discount int) string {
strArr := strings.Split(sentence, " ")
n := len(strArr)
for i := 0; i < n; i++ {
if checkMoney(strArr[i]) {
num, _ := strconv.Atoi(strArr[i][1:])
strArr[i] = fmt.Sprintf("$%.2f", float64(num*100-num*discount)/100.0)
}
}
return strings.Join(strArr, " ")
}
func checkMoney(str string) bool {
n := len(str)
if n < 2 || str[0] != '$' {
return false
}
for i := 1; i < n; i++ {
if str[i] < '0' || str[i] > '9' {
return false
}
}
return true
}
|
