所以我应该修改一个代码,将一个不公平的硬币翻转100次。如果你得到头(你的机会稍微好一点)并且尾巴损失1美元,你会得到1美元。在每个回合结束时,它应该返回整数奖金的值,直到100翻转结束。我收到以下错误:
CoinFlipExperiment.java:18: error: missing return statement
}
^ 1 error
有人有想法吗?
public class CoinFlipExperiment {
static public int coinFlipExperiment (){
int winnings = 0;
for (int i = 1; i<= 100; i++) {
double flip = Math.random();
if (flip< 0.505) { //heads
winnings = winnings + 1;
}
else { //tails
winnings = winnings - 1;
}
System.out.println( winnings );
}
}
public static void main(String[] args) {
int amount = coinFlipExperiment ();
System.out.println ("Win/loss amount: " + amount);
}
}
答案 0 :(得分:1)
您在coinFlipExperiment方法中缺少return语句,它必须是:
return winnings ;
正如我猜的那样。所以试试这个:
static public int coinFlipExperiment (){
int winnings = 0;
for (int i = 1; i<= 100; i++) {
double flip = Math.random();
if (flip< 0.505) { //heads
winnings = winnings + 1;
}
else { //tails
winnings = winnings - 1;
}
System.out.println( winnings );
}
return winnings ;
}
public static void main(String[] args) {
int amount = coinFlipExperiment ();
System.out.println ("Win/loss amount: " + amount);
}
}
答案 1 :(得分:0)
你的函数coinFlipExperiment
返回一个整数,但你没有返回任何东西。
您需要在winnings
结束时返回coinFlipExperiment
。