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布爾的錯誤,我正在做的事情codingbat編碼的運動,這就是我該做的:上codingbat
鑑於2陽性int類型,返回較大值的範圍是10..20包容如果兩者都不在該範圍內,則返回0。
max1020(11,19)→19 max1020(19,11)→19 max1020(11,9)→11 max1020(9,21)→0
我的代碼:
public boolean IsInRange(int value)
{
return value >= 10 && value <= 20;
}
public int max1020(int a, int b) {
if (IsInRange(a) && IsInRange(b))
return a > b ? a : b;
else if (IsInRange(a))
return a;
else if (IsInRange(b))
return b;
}
我不明白爲什麼它不工作,它給了我這個錯誤:
Error: public int max1020(int a, int b) {
^^^^^^^^^^^^^^^^^^^^^
This method must return a result of type int
Possible problem: the if-statement structure may theoretically
allow a run to reach the end of the method without calling return.
Consider adding a last line in the method return some_value;
so a value is always returned.