我有問題讓我的類編譯。它給我錯誤,如「雙不能取消」和「找不到符號」。使用數組作爲方法(Java)
的潛水員是:
public class MinilabArraysDriver{
public static void main(String[ ] args){
//create a 1d array of ints
int[ ] array1d = { 8, 8, 7, 5, 3 };
//call mean1d Method to find the mean (note the static call...)
double theMean = MinilabArrays.mean1d(array1d);
//print the original array and the mean
System.out.print("The mean of: { ");
for (int i=0; i<array1d.length; i++){
if (i != 0)
System.out.print(" ");
//print first for separation (except before first element)
System.out.print(array1d[i]);
}
System.out.print(" } is: " + theMean);
//------------------------------------------------------------
System.out.println("\n\n");
//create a 2d array of doubles
double[ ][ ] array2d = {{ 3.4, 5.1, 8.0},
{ 5.23, 8.2 },
{ 10.7 },
{ 2.9 }
};
//call sum2d to get the sum
double total = MinilabArrays.sum2d(array2d);
//print the 2D array
for (int row=0; row<array2d.length; row++){
System.out.println();
for (int col=0; col<array2d[row].length; col++)
System.out.print(array2d[row][col] + "\t");
}
//print the result
System.out.println("\n\nTotal of 2d array is: " + total);
System.out.println("\n\n");
}
}
這裏是我想寫類:
public class MinilabArrays{
public static double mean1d(int[ ] theMean){
double total = 0;
for (int i = 0 ;i < theMean.length ; i++){
total = total + theMean [ i ];
total = total/theMean.length;
return total;
}
}
public static double sum2d(double [ ] theSum){
double total2, total3, total4 = 0;
for(int row=0 ; row < theSum.length ; row++){
for (int col=0 ; col<theSum[row].length ; col++)
total2 = total2 + theSum[col];
}
total3 = total3 + theSum[row];
total4 = total3 + total2;
return total4;
}
}
對於「mean1d」我試圖找到給定的均值或平均數量,併爲「sum2d」我試圖找到給定數量的總和。
對不起,如果我的代碼是愚蠢的或愚蠢的。如果它不讓我編譯,我無法檢查它。
謝謝你幫助我!
究竟是什麼錯誤,你好嗎? –
當你得到它來編譯時,你會發現'mean1d'中的循環並不是一個循環。它只會執行一次然後離開。 – ajb
我得到「雙不能被解除引用」和「找不到符號」。 – Paincakes