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以下のコードは、'for' ループを実行して 1 から 12 の月を作成し、番号に従って Jan から Dec までの各月に名前を付けます。その部分はうまくコンパイルされます。画面に月の名前を書き込もうとしている下部に、失敗している場所があります。「割り当てられていないローカル変数 'monthName' の使用; ただし、 monthName は以前に使用されたばかりで、上記で宣言されています。提供できるヘルプがあれば大歓迎です。 

for (int month = 1; month <= 12; month++)
{
    string monthName;
    double monthlyProd = .1 * dProdRate;
    double monthlySales = .07 * dSalesRate;
    if (month == 1) { monthName = "Jan"; }
    if (month == 2) { monthName = "Feb"; monthlyProd = 0; }
    if (month == 3) { monthName = "Mar"; }
    if (month == 4) { monthName = "Apr"; }
    if (month == 5) { monthName = "May"; }
    if (month == 6) { monthName = "Jun"; monthlyProd = 0; }
    if (month == 7) { monthName = "Jul"; }
    if (month == 8) { monthName = "Aug"; }
    if (month == 9) { monthName = "Sep"; monthlySales = (.15 * dSalesRate); }
    if (month == 10) { monthName = "Oct"; }
    if (month == 11) { monthName = "Nov"; }
    if (month == 22) { monthName = "Dec"; monthlySales = (.15 * dSalesRate); }
}
dEndingInventory += dPreviousProd - dPreviousSales;
Console.WriteLine("{0}{1,15}{2,15}{3,15}", monthName, monthlyProd, monthlySales, dEndingInventory);
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3 に答える 3

0

You have declared the monthName, monthlyProd,monthlySales under the scope of For Loop and trying to use those variables out of the scope of For Loop. You should declare variables before for loop-

string monthName;
double monthlyProd = .1 * dProdRate;
double monthlySales = .07 * dSalesRate;

for (int month = 1; month <= 12; month++)
{

    if (month == 1) { monthName = "Jan"; }
    if (month == 2) { monthName = "Feb"; monthlyProd = 0; }
    if (month == 3) { monthName = "Mar"; }
    if (month == 4) { monthName = "Apr"; }
    if (month == 5) { monthName = "May"; }
    if (month == 6) { monthName = "Jun"; monthlyProd = 0; }
    if (month == 7) { monthName = "Jul"; }
    if (month == 8) { monthName = "Aug"; }
    if (month == 9) { monthName = "Sep"; monthlySales = (.15 * dSalesRate); }
    if (month == 10) { monthName = "Oct"; }
    if (month == 11) { monthName = "Nov"; }
    if (month == 22) { monthName = "Dec"; monthlySales = (.15 * dSalesRate); }
}
dEndingInventory += dPreviousProd - dPreviousSales;
Console.WriteLine("{0}{1,15}{2,15}{3,15}", monthName, monthlyProd, monthlySales, dEndingInventory);
于 2014-11-12T06:09:51.213 に答える