2023年9月計算機二級考試JAVA考試題及答案

第頁共頁2023年9月計算機二級考試JAVA考試題及答案2023年9月計算機二級考試JAVA考試題及答案考試題一：1、編寫程序，計算以下分段函數(shù)的值。x?(x》=0)y=-x?(x<0)importjava.io.*;publicclasstesta{publicstaticvoidmain(String[]args)throwsIOException{float?x,y;InputStreamReaderreader=newInputStreamReader(System.in);BufferedReaderinput=newBufferedReader(reader);System.out.println(“請輸入x:”);Stringtemp=input.readLine;x=Float.parseFloat(temp);if(x》=0){y=x;}else{y=-x;}System.out.println(“y=”+y);}}2、根據(jù)年齡，判斷某人是否為成年。importjava.io.*;publicclasstesta{publicstaticvoidmain(String[]args)throwsIOException{intx;InputStreamReaderreader=newInputStreamReader(System.in);BufferedReaderinput=newBufferedReader(reader);System.out.println(“請輸入x:”);Stringtemp=input.readLine;x=Float.parseFloat(temp);if(x》=18){System.out.println(“成年人”);}if(x<18){System.out.println(“未成年”);}}}3、判斷2023的奇偶性，并進展輸出。publicclasstest{publicstaticvoidmain(String[]args){intx;x=2023;if(x%2==0)System.out.println(+x+“是偶數(shù)”);elseSystem.out.println(+x+“不是偶數(shù)”);}}4、比擬兩個數(shù)的大小，找出其中的最大數(shù)并輸出。importjava.io.*;publicclasska{publicstaticvoidmain(String[]args)throwsIOException{float?x,y,m;m=0;InputStreamReaderreaderx=newInputStreamReader(System.in);BufferedReaderinputx=newBufferedReader(readerx);System.out.println(“請輸入x:”);Stringtempx=inputx.readLine;x=Float.parseFloat(tempx);InputStreamReaderreadery=newInputStreamReader(System.in);BufferedReaderinputy=newBufferedReader(readery);System.out.println(“請輸入y:”);Stringtempy=inputy.readLine;y=Float.parseFloat(tempy);if(x》y){m=x;}else{m=y;}System.out.println(“最大數(shù)為”+m);}}5、比擬兩個數(shù)的大小，找出其中的最小數(shù)并輸出。importjava.io.*;publicclasska{publicstaticvoidmain(String[]args)throwsIOException{float?x,y,m;m=0;InputStreamReaderreaderx=newInputStreamReader(System.in);BufferedReaderinputx=newBufferedReader(readerx);System.out.println(“請輸入x:”);Stringtempx=inputx.readLine;x=Float.parseFloat(tempx);InputStreamReaderreadery=newInputStreamReader(System.in);BufferedReaderinputy=newBufferedReader(readery);System.out.println(“請輸入y:”);Stringtempy=inputy.readLine;y=Float.parseFloat(tempy);if(x{m=x;}else{m=y;}System.out.println(“最小數(shù)為”+m);}}6、編寫一個Java程序，判斷某年份是否為閏年。importjava.io.*;publicclasstesta{publicstaticvoidmain(String[]args)throwsIOException{float?x;InputStreamReaderreader=newInputStreamReader(System.in);BufferedReaderinput=newBufferedReader(reader);System.out.println(“請輸入x:”);Stringtemp=input.readLine;x=Float.parseFloat(temp);if(x@0==0){System.out.println(+x+“是閏年”);}elseif(x%4==0){System.out.println(+x+“是閏年”);}else{System.out.println(+x+“不是閏年”);}}}7、比擬兩個數(shù)的大小，找出其中的'最大數(shù)和最小數(shù)并輸出。importjava.io.*;publicclasska{publicstaticvoidmain(String[]args)throwsIOException{float?x,y;InputStreamReaderreaderx=newInputStreamReader(System.in);BufferedReaderinputx=newBufferedReader(readerx);System.out.println(“請輸入x:”);Stringtempx=inputx.readLine;x=Float.parseFloat(tempx);InputStreamReaderreadery=newInputStreamReader(System.in);BufferedReaderinputy=newBufferedReader(readery);System.out.println(“請輸入y:”);Stringtempy=inputy.readLine;y=Float.parseFloat(tempy);if(x{System.out.println(“最小數(shù)為”+x);System.out.println(“最大數(shù)為”+y);}else{System.out.println(“最小數(shù)為”+y);System.out.println(“最大數(shù)為”+x);}}}8、比擬兩個數(shù)的大小，找出其中的最大數(shù)和最小數(shù)，并輸出最大數(shù)和最小數(shù)之差。importjava.io.*;publicclasska{publicstaticvoidmain(String[]args)throwsIOException{float?x,y,m;InputStreamReaderreaderx=newInputStreamReader(System.in);BufferedReaderinputx=newBufferedReader(readerx);System.out.println(“請輸入x:”);Stringtempx=inputx.readLine;x=Float.parseFloat(tempx);InputStreamReaderreadery=newInputStreamReader(System.in);BufferedReaderinputy=newBufferedReader(readery);System.out.println(“請輸入y:”);Stringtempy=inputy.readLine;y=Float.parseFloat(tempy);if(x{System.out.println(“最小數(shù)為”+x);System.out.println(“最大數(shù)為”+y);m=y-x;System.out.println(“最大數(shù)與最小數(shù)之差為”+m);}else{System.out.println(“最小數(shù)為”+y);System.out.println(“最大數(shù)為”+x);m=x-y;System.out.println(“最大數(shù)與最小數(shù)之差為”+m);}}}9、編寫程序，計算以下分段函數(shù)的值。x?(x》0)y=--0?(x=0)-x?(x<0)importjava.io.*;publicclasstesta{publicstaticvoidmain(String[]args)throwsIOException{float?x,y;y=0;InputStreamReaderreader=newInputStreamReader(System.in);BufferedReaderinput=newBufferedReader(reader);System.out.println(“請輸入x:”);Stringtemp=input.readLine;x=Float.parseFloat(temp);if(x》0){y=x;}if(x==0){y=0;}if(x<0){y=-x;}System.out.println(“y=”+y);}}10、編寫程序，計算以下分段函數(shù)的值。x-1?(x》1)y=--0?(-1≤x≤1)x+10?(x<-1)importjava.io.*;publicclasstesta{publicstaticvoidmain(String[]args)throwsIOException{float?x,y;y=0;InputStreamReaderreader=newInputStreamReader(System.in);BufferedReaderinput=newBufferedReader(reader);System.out.println(“請輸入x:”);Stringtemp=input.readLine;x=Float.parseFloat(temp);if(x》1){y=x-1;}if(1.0》=x--x》=-1.0){y=0;}if(x<-1){y=x+10;}System.out.println(“y=”+y);}}考試題二：1、編寫程序，實現(xiàn)1到100之間整數(shù)的累加并輸出運算結(jié)果。publicclassa{publicstaticvoidmain(String[]args){inti,s=0;for(i=1;i<=100;i++){s=s+i;}System.out.println(“1到100的累加和是”+s);}}2、編寫程序，計算1~100中奇數(shù)的累加和并輸出。publicclassa{publicstaticvoidmain(String[]args){inti,s=0;for(i=1;i<=100;i++){if(i%2!=0)s=s+i;}System.out.println(“1到100的奇數(shù)累加和是”+s);}}3、編寫程序，計算1~100中偶數(shù)的累加和并輸出。publicclassa{publicstaticvoidmain(String[]args){inti,s=0;for(i=1;i<=100;i++){if(i%2==0)s=s+i;}System.out.println(“1到100的偶數(shù)累加和是”+s);}}4、編寫程序，計算10的階乘并輸出運算結(jié)果。publicclassa{publicstaticvoidmain(String[]args){inti,s=1;for(i=1;i<=10;i++){s=s*i;}System.out.println(“10的階乘是”+s);}}5、編寫程序，計算1、2、3...的累加和，條件是和小于50。publicclassa{publicstaticvoidmain(String[]args){inti=1,s=0;label:while(true){?s=s+i;i++;if(s》50){s=s+1-i;break;}}System.out.println(“從1開場的累加和小于50的累加和是”+s);}}6、編寫程序，計算偶數(shù)2、4、6...的累加和，條件是和小于50。publicclassa{publicstaticvoidmain(String[]args){inti=1,s=0;label:while(true){?s=s+2*i;i++;if(s》50){s=s-2*i+2*1;break;}}System.out.println(“從2開場的偶數(shù)累加和小于50的累加和是”+s);}}7、編寫程序，輸出以下圖案：****************publicclassa{publicstaticvoidmain(String[]args){inti,k;for(i=1;i<=4;i++){for(k=1;k<=2*i-1;k++)System.out.print(“*”);System.out.println;}}}8、編寫程序，輸出以下圖案：****************publicclassa{publicstaticvoidmain(String[]args){inti,j,k;for(i=1;i<=4;i++){for(j=1;j<=8-2*i;j++)System.out.print(“”);for(k=1;k<=2*i-1;k++)System.out.print(“*”);System.out.println;}}}9、編寫程序，輸出以下圖案：****************publicclassa{publicstaticvoidmain(String[]args){inti,j,k;for(i=1;i<=4;i++){for(j=1;j<=2*i-2;j++)System.out.print(“”);for(k=1;k<=9-2*i;k++)System.out.print(“*”);System.out.println;}}}10、編寫程序在終端打印1~100之間的素數(shù)。publicclassa{publicstaticvoidmain(String[]args){inti,j;label:for(i=2;i<=100;i++){--?for(j=2;jif(i%j==0)continuelabel;System.out.print(+i);System.out.println;}}}11、編寫一個java程序，用窮舉法找出2~50之間的素數(shù)，并打印出來。publicclasss{publicstaticvoidmain(Stringargs[]){inti,j,k;booleanflag;for(i=2;i<=50;i++){flag=true;k=i/2;for(j=2;j<=k;j++){if(i%j==0){flag=false;break;}}if(flag){System.out.println(i+“”);}}}}12、編寫一自定義方法，找出兩個數(shù)中的最大數(shù)，并main方法中驗證。publicclassa{staticdoubleMax(doublex,doubley){-doublet;if(x》=y){t=x;}else{t=y;--}returnt;}publicstaticvoidmain(String[]args){doublex,y,m;x=549.265;y=56.28;m=Max(x,y);System.out.println(“最大數(shù)是”+m);System.out.println(“x=”+x+“y=”+y);if(m》=x--y<=m){System.out.println(“ture”);}else{System.out.println(“flase”);}}}13、編寫一自定義方法，找出兩個數(shù)中的最小數(shù)，并main方法中驗證。publicclassa{staticdoubleMin(doublex,doubley){-doublet;if(x<=y){t=x;}else{t=y;--}returnt;}publicstaticvoidmain(String[]args){doublex,y,m;x=245.38;y=525.63;m=Mi