这个if else语句有什么问题？

Question

我和Ada一起工作，控制声明上缺少括号让我有点混乱。我写了以下if-else语句：

if i = 1 then
    largest := nextInteger;
else if i = 2 then
    if nextInteger > largest then
        secondLargest := largest;
        largest := nextInteger;
    else
        secondLargest := nextInteger;
    end if;
else
    if nextInteger > largest then
        secondLargest := largest;
        largest := nextInteger;
    else if largest > nextInteger and then nextInteger > secondLargest then
        secondLargest := nextInteger;
    end if;
end if;

我得到的错误信息是：

program_one.adb:15:05: missing "end if:" for "if" at line 3
program_one.adb:15:05: missing "end if;" for "if" at line 1

我很难找到我没有关闭if语句的地方。已经很晚了，我整天都在工作，所以我可能只是累了。有人可以帮忙吗？

Answer 1

试试这个

if i = 1 then
    largest := nextInteger;
elsif i = 2 then
    if nextInteger > largest then
        secondLargest := largest;
        largest := nextInteger;
    else
        secondLargest := nextInteger;
    end if;
else
    if nextInteger > largest then
        secondLargest := largest;
        largest := nextInteger;
    elsif largest > nextInteger and then nextInteger > secondLargest then
        secondLargest := nextInteger;
    end if;
end if;

Answer 2

因为“else if”不正确。使用“elsif”。