爪哇 - 最高，最低和平均

Question

對，所以爲什麼Java的想出這個錯誤：

異常在線程「主要」 java.lang.Error的：未解決的問題，編譯： 類型不匹配：不能從雙轉換爲int

在rainfall.main（rainfall.java:38）

從這：

public class rainfall { 

/** 
    * @param args 
    */ 
public static void main(String[] args) 
{ 
int[] numgroup; 
numgroup = new int [12]; 
ConsoleReader console = new ConsoleReader(); 
int highest; 
int lowest; 
int index; 
int tempVal; 
int minMonth; 
    int minIndex; 
int maxMonth; 
int maxIndex; 


System.out.println("Welcome to Rainfall"); 
// Input (index now 0-based) 
for(index = 0; index < 12; index = index + 1) 
{  
    System.out.println("Please enter the rainfall for month " + index + 1); 
    tempVal = console.readInt(); 
    while (tempVal>100 || tempVal<0) 
    { 
     System.out.println("The rating must be within 0...100. Try again"); 
     tempVal = console.readInt(); 
    } 
    numgroup[index] = tempVal; 
}   

lowest = numgroup[0]; 
highest = numgroup[0]; 
int total = 0.0; 
// Loop over data (using 1 loop) 
for(index = 0; index < 12; index = index + 1) 
{  
    int curr = numgroup[index]; 
    if (curr < lowest) { 
     lowest = curr; 
     minIndex = index; 
    } 
    if (curr > highest) { 
     highest = curr; 
     maxIndex = index; 
    } 
     total += curr; 
} 
float avg = (float)total/numgroup.length; 

System.out.println("The average monthly rainfall was " + avg); 
// +1 to go from 0-based index to 1-based month 
System.out.println("The lowest monthly rainfall was month " + minIndex + 1); 
System.out.println("The highest monthly rainfall was month " + maxIndex + 1); 

System.out.println("Thank you for using Rainfall"); 

} 


private static ConsoleReader ConsoleReader() { 

    return null; 
} 

} 

Answer 1

我猜的罪魁禍首就是這條線：

int total = 0.0; 

應該

int total = 0; 

代替。

Answer 2

問題是這條線的位置：

int total = 0.0; 

需要改變總要float類型