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ID:51300918
大小:89.50 KB
页数:8页
时间:2020-03-10
《面向对象程序设计JAVA程序设计课后习题答案.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第一章1.publicclassBegintoLearn{publicstaticvoidmain(Stringargs[]){System.out.println("I’dliketostudyJava!");}}2.publicclassTraStar{publicstaticvoidmain(Stringargs[]){System.out.println("*");System.out.println("**");System.out.println("***");System.out.println("****");System.out.prin
2、tln("*****");}}第二章1.publicclassProNum{publicstaticvoidmain(Stringargs[]){floatp;longq;intm=10,n=5;System.out.println("m="+m+"n="+n);m=m+3;n=n+5;System.out.println("m="+m+"n="+n);p=(float)(m+n)/2;System.out.println("p="+p);q=(m*m*n*n);System.out.println("q="+q);}}2.classSphereClass
3、{publicstaticvoidmain(Stringargs[]){intr=3;doublev;v=3.14*r*r*r*4/3;System.out.println("V="+v)}}第三章1.importjava.io.*;publicclassInNum{publicstaticvoidmain(Stringargs[])throwsIOException{intnum1,num2;Stringstr;BufferedReaderbuf;buf=newBufferedReader(newInputStreamReader(System.in))
4、;System.out.print("Inputfirstinteger:");str=buf.readLine();num1=Integer.parseInt(str);System.out.print("Inputsecondinteger:");str=buf.readLine();num2=Integer.parseInt(str);System.out.println("Thesumis"+(num1+num2));}}2.importjava.io.*;publicclassGrade{publicstaticvoidmain(Stringar
5、gs[])throwsIOException{intscore;charch;Stringstr;BufferedReaderbuf;buf=newBufferedReader(newInputStreamReader(System.in));System.out.print("Inputthescore(0-100):");str=buf.readLine();score=Integer.parseInt(str);if(score>=90)ch='A';elseif(score>=75)ch='B';elseif(score>=60)ch='C';el
6、sech='D';System.out.print("TheGradeis"+ch);}}3.publicclassShuLie{publicstaticvoidmain(Stringargs[]){inta,q,n;q=(150-135)/5;a=(135-20*q)/5;for(n=0;n<10;n++)System.out.print((a+n*q)+"");}}2.publicclassPyramid{publicstaticvoidmain(Stringargs[]){inti,j,k;for(i=0;i<=4;i++){for(j=0;j<20
7、-i;j++)System.out.print("");for(k=0;k<=2*i;k++)if(k<=i)System.out.print(""+(2*k+1));elseSystem.out.print(""+(2*(2*i-k)+1));System.out.println();}}}3.importjava.io.*;publicclassPrimeNumber{publicstaticvoidmain(Stringargs[])throwsIOException{intn=0;intm;Stringstr;booleanmark=false;B
8、ufferedReaderbuf;buf=newBufferedR
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