稅務計算中未定義的遞迴
在此遞歸稅務運算函數中：
function taxes(tax, taxWage) {
var minWage = firstTier; //defined as a global variable
if (taxWage > minWage) {
//calculates tax recursively calling two other functions difference() and taxStep()
tax = tax + difference(taxWage) * taxStep(taxWage);
var newSalary = taxWage - difference(taxWage);
taxes(tax, newSalary);
} else {
returnTax = tax + taxWage * taxStep(taxWage);
return returnTax;
}
}在此遞歸稅務運算函數中：
if (taxWage > minWage) {
// calculates tax recursively calling two other functions difference() and taxStep()
tax = tax + difference(taxWage) * taxStep(taxWage);
var newSalary = taxWage - difference(taxWage);
taxes(tax, newSalary);
}遞歸終止。具體來說，問題在於呼叫遞歸呼叫的函數臂：
這裡，函數不傳回任何值或設定 returnTax 變數。當函數沒有明確返回時，它預設會傳回 undefined。因此，遞歸會無限期地繼續，從而導致未定義的結果。if (taxWage > minWage) {
// calculates tax recursively calling two other functions difference() and taxStep()
tax = tax + difference(taxWage) * taxStep(taxWage);
var newSalary = taxWage - difference(taxWage);
return taxes(tax, newSalary);
}要解決此問題，您應該修改這部分程式碼，如下所示：
此變更可確保函數傳回遞歸呼叫的結果，正確地將值沿著遞歸鏈傳播。以上是為什麼這個遞迴稅務運算函數會導致未定義的遞迴？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
