[Java]除法之無條件進位

Source File Name : RoundUp.java
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import java.math.*;

class RoundUp
{
  public static void main(String[] args)
  {
    int a1 = 10;
    int a2 = 3;
    int intresult;
    String strresult;

    BigDecimal b1 = new BigDecimal(String.valueOf(a1));
    BigDecimal b2 = new BigDecimal(String.valueOf(a2));

    //將 BigDecimal 轉成 int
    intresult = ((b1.divide(b2,0,BigDecimal.ROUND_UP)).toBigInteger()).intValue();

    //將 BigDecimal 轉成 String
    strresult = (b1.divide(b2,0,BigDecimal.ROUND_UP)).toString();

    System.out.println( String.valueOf(a1) + "÷" + String.valueOf(a2)
       + " 無條件進位 " + strresult );

    //將 int 轉成 String
    System.out.println( String.valueOf(a1) + "÷" + String.valueOf(a2)
       + " 無條件進位 " + String.valueOf(intresult) );

  }
}
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Result :
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10÷3 無條件進位 4
10÷3 無條件進位 4
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