java语言程序设计(基础篇)第二章程序练习题答案.docx

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1、2.1（将摄氏温度转化为华氏温度）importjava.util.*;publicclasstest{publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstubScannerinput=newScanner(System.in);System.out.print("Enteradegreeincelsius:");doubleCelsius=input.nextDouble();doubleFahrenheit;Fahrenheit=(9.0/5)*Celsius+32;System.out.println

2、(Celsius+"Celsiusis"+Fahrenheit+"Fahrenheit");}}2.2（计算圆柱体的体积）importjava.util.*;publicclasstest{publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstubScannerinput=newScanner(System.in);System.out.print("Entertheradiusandlengthofacylinder:");doubleradius=input.nextDouble();doublelen

3、gth=input.nextDouble();doublearea=radius*radius*Math.PI;doublevolume=area*length;System.out.println("Theareais"+area);System.out.println("Thevolumeis"+volume);}}2.3（将英尺转换为米）importjava.util.Scanner;publicclasstest{publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstubScannerinput=n

4、ewScanner(System.in);System.out.print("Enteravalueforfeet:");doublefeet=input.nextDouble();doublemeters=feet*0.305;System.out.println(feet+"feetis"+meters+"meters");}}2.4（将磅转换为千克）importjava.util.Scanner;publicclasstest{publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstubScanneri

5、nput=newScanner(System.in);System.out.print("Enteranumberinpounds:");doublepounds=input.nextDouble();doublekilograms=pounds*0.454;System.out.println(pounds+"poundsis"+kilograms+"kilograms");}}2.5（财务应用程序：计算消费）importjava.util.Scanner;publicclasstest{publicstaticvoidmain(String[]args){//TODOAut

6、o-generatedmethodstubScannerinput=newScanner(System.in);System.out.print("Enterthesubtotalandgratuityrate:");doublesubtotal=input.nextDouble();doubleGratuity=input.nextDouble();doublegratuity=subtotal*Gratuity*0.01;doubletotal=gratuity+subtotal;System.out.println("Thegratuityis$"+gratuity+"a

7、ndtotalis"+total);}}2.6（求一个整数个位数的和）importjava.util.Scanner;publicclasstest{publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstubScannerinput=newScanner(System.in);System.out.print("Enteranumberbetween0and1000:");intnumber=input.nextInt(