java基础作业1附答案.doc

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1、1.X(x<1)Y=2x-1(110)要求输入x值后，输出y值。packagestudent.xiaoqiao.day01;importjava.util.Scanner；publicclassYi{publicstaticvoidmain(String[]args){System.out.println("请输入一个数");Scannersc=newScanner(System.in);intx=sc.nextInt();if(x<1){System.out.println("y="+x);}if(x>1&x<10){System.out.println("y

2、="+(2*x-1));}if(x>10){System.out.println("y="+(3*x-11));}}}1.输入一个年份判断year是否是闰年packagestudent.xiaoqiao.day01;importjava.util.Scanner;publicclassEr{publicstaticvoidmain(String[]args){System.out.println("请输入年份");Scannersc=newScanner(System.in);intyear=sc.nextInt();if((year%4==0&year%100!=0)

3、(year%400

4、==0))System.out.println("是闰年");elseSystem.out.println("不是闰年");}}2.任意输入a,b,c3个数判断a，b，c大小packagestudent.xiaoqiao.day01;importjava.util.Scanner;publicclassSan{publicstaticvoidmain(String[]args){System.out.println("请输入三个数（加空格或回车）:");Scannersc=newScanner(System.in);intx=sc.nextInt();inty=sc.nextInt();i

5、ntz=sc.nextInt();if(x>y&x>z){System.out.println(x);}elseif(x

6、t.print("");}for(intk=1;k<=2*i-1;k++){System.out.print("*");}System.out.print('');}}}4_2输出图形*********packagestudent.xiaoqiao.day01;publicclassSi_1{publicstaticvoidmain(String[]args){inttemp=3;for(inti=1;i<=temp;i++){for(intj=1;j<=temp-i;j++){System.out.print("");}for(intk=1;k<=2*i-1;k++){System.

7、out.print("*");}System.out.print('');}}}4_3输出图形任意输入n当输入n值为1时，输出*当输入n值为2时，输出当输入n值为3时，输出.。。。。。当输入n值为5时，输出*****************************************packagestudent.xiaoqiao.day01;importjava.util.Scanner;publicclassSi_3{publicstaticvoidmain(String[]args){System.out.println("请输入一个数：");Scannersc=newScan

8、ner(System.in);inttemp=sc.nextInt();for(inti=1;i<=temp;i++){for(intj=1;j<=temp-i;j++){System.out.print("");}for(intk=1;k<=2*i-1;k++){System.out.print("*");}System.out.print('');}for(inti=temp;i>=1;i--){for(intj