解题思路:
注意事项:
参考代码:
import java.math.BigDecimal; import java.text.DecimalFormat; import java.util.Scanner; public class T1893 { public static void main(String[] args) { Scanner in = new Scanner(System.in); BigDecimal H2o = new BigDecimal("3.0E-23"); while(in.hasNext()){ double n = in.nextDouble(); BigDecimal ans = new BigDecimal(n*950); ans = ans.divide(H2o, 10,BigDecimal.ROUND_HALF_DOWN); DecimalFormat form = new DecimalFormat("0.000000E000"); StringBuilder s = new StringBuilder(form.format(ans)); s.replace(s.indexOf("E"), s.indexOf("E")+1,"E+"); System.out.println(s); } in.close(); } }
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