浙大java上机题全解.doc

_程序填空，不要改变与输入输出有关的语句。输入1个实数x，计算并输出其平方根。例：输入1.21输出The square root of 1.21 is 1.1import java.io.*;import java.util.Scanner;public class Test20002 public static void main(String args) double x, root; Scanner in=new Scanner(System.in); x=in.nextDouble(); /*-*/ System.out.println(The square root of +x+ is +root); _答案：import java.io.*;import java.util.Scanner;public class Test20002 public static void main(String args) double x, root; Scanner in=new Scanner(System.in); x=in.nextDouble(); /*-*/ root=Math.sqrt(x); System.out.println(The square root of +x+ is +root); 程序填空，不要改变与输入输出有关的语句。输入华氏温度f，计算并输出相应的摄氏温度c。c = 5/9(f-32).例：括号内是说明输入17.2 (华氏温度)输出The temprature is -8.222222222222223import java.util.Scanner;public class Test20003 public static void main(String args) Scanner in=new Scanner(System.in); double f, c; f=in.nextDouble(); /*-*/ System.out.println(The temprature is +c); _答案：import java.util.Scanner;public class Test20003 public static void main(String args) Scanner in=new Scanner(System.in); double f, c; f=in.nextDouble(); /*-*/ c=5*(f-32.0)/9; System.out.println(The temprature is +c); 程序填空，不要改变与输入输出有关的语句。输入2个整数time1和time2，表示火车的出发时间和到达时间，计算并输出旅途时间。有效的时间范围是0000到2359，不需要考虑出发时间晚于到达时间的情况。例：括号内是说明输入712 1411（出发时间是7：10，到达时间是14：11）输出The train journey time is 6 hrs 59 mins.import java.util.Scanner;public class Test20004 public static void main(String args) Scanner in=new Scanner(System.in); int time1, time2, hours, mins; time1=in.nextInt(); time2=in.nextInt(); /*-*/ System.out.println(The train journey time is +hours+ hrs + mins+ mins.); _答案：import java.util.Scanner;public class Test20004 public static void main(String args) Scanner in=new Scanner(System.in); int time1, time2, hours, mins; time1=in.nextInt(); time2=in.nextInt(); /*-*/ time1=(time1/100)*60+time1%100; time2=(time2/100)*60+time2%100; hours=(time2-time1)/60; mins=(time2-time1)-hours*60; System.out.println(The train journey time is +hours+ hrs + mins+ mins.); 程序填空，不要改变与输入输出有关的语句。输入1个四位数，将其加密后输出。方法是将该数每一位上的数字加9，然后除以10取余，做为该位上的新数字，最后将第1位和第3位上的数字互换，第2位和第4位上的数字互换，组成加密后的新数。例：括号内是说明输入1257输出The encrypted number is 4601(每一位上的数字加9除以10取余后，得0146，交换后得到4601)import java.util.Scanner;public class Test20005 public static void main(String args) Scanner in=new Scanner(System.in); int number, digit1, digit2, digit3, digit4, newnum; number=in.nextInt(); /*-*/ System.out.println(The encrypted number is +newnum); _答案：import java.util.Scanner;public class Test20005 public static void main(String args) Scanner in=new Scanner(System.in); int number, digit1, digit2, digit3, digit4, newnum; number=in.nextInt(); /*-*/ int temp; digit1=number/1000; digit2=(number-digit1*1000)/100; digit3=(number-digit1*1000-digit2*100)/10; digit4=number%10; digit1=(digit1+9)%10; digit2=(digit2+9)%10; digit3=(digit3+9)%10; digit4=(digit4+9)%10; temp=digit1; digit1=digit3; digit3=temp; temp=digit2; digit2=digit4; digit4=temp; newnum=digit1*1000+digit2*100+digit3*10+digit4; System.out.println(The encrypted number is +newnum); 程序填空，不要改变与输入输出有关的语句。输入一个大写英文字母，输出相应的小写字母。例：输入G输出gimport java.io.*;public class Test20006 public static void main(String args) throws IOException char ch; ch=(char)System.in.read(); /*-*/ System.out.println(ch); _答案：import java.io.*;public class Test20006 public static void main(String args) throws IOException char ch; ch=(char)System.in.read(); /*-*/ ch=(char)(ch+32); / 以ASCII码计算 System.out.println(ch); 程序填空，不要改变与输入输出有关的语句。已知某位学生的数学、英语和计算机课程的成绩分别是87分、72分和93分，求该生3门课程的平均分。本题无输入。输出示例：math = 87, eng = 72, comp = 93average = 84public class test20007 public static void main(String args) int math, eng, comp, average; /*/ System.out.println(math = +math+, eng = +eng+, comp = +comp); System.out.println(average = + average); _答案：public class test20007 public static void main(String args) int math, eng, comp, average; /*/ math=87; eng=72; comp=93; average=(math+eng+comp)/3; System.out.println(math = +math+, eng = +eng+, comp = +comp); System.out.println(average = + average); 程序填空，不要改变与输入输出有关的语句。输入存款金额 money、存期 year 和年利率 rate，根据下列公式计算存款到期时的利息 interest(税前)，输出时保留2位小数。interest = money(1+rate)year - money输入输出示例：括号内为说明输入1000 3 0.025 (money = 1000, year = 3, rate = 0.025)输出interest = 76.89import java.util.Scanner;public class test20008 public static void main(String args) int money, year; double interest, rate; Scanner in=new Scanner(System.in); /*使用in.nextDouble()和in.nextInt()输入double和int型数据*/ /*/ System.out.println(interest = + (int)(interest*100+0.5)/100.0); _答案：import java.util.Scanner;public class test20008 public static void main(String args) int money, year; double interest, rate; Scanner in=new Scanner(System.in); /*/ money=in.nextInt(); year=in.nextInt(); rate=in.nextDouble(); interest=money*Math.pow(1+rate),year)-money; System.out.println(interest = + (int)(interest*100+0.5)/100.0); 程序填空，不要改变与输入输出有关的语句。输入一个正整数repeat (0repeat10)，做repeat次下列运算：输入一个学生的数学成绩，如果它低于60，输出“Fail”，否则，输出“Pass”。输出使用System.out.println(Pass);及System.out.println(Fail);例：括号内是说明输入2 (repeat=2) 60 59输出PassFailimport java.util.Scanner;public class Test30001 public static void main(String args)int ri, repeat;int mark;Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri=repeat; ri+) mark=in.nextInt(); /*-*/ _答案：import java.util.Scanner;public class Test30001 public static void main(String args) int ri, repeat; int mark; Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri=60) System.out.println(Pass); else System.out.println(Fail); 程序填空，不要改变与输入输出有关的语句。输入一个正整数repeat (0repeat10)，做repeat次下列运算：输入四个整数，输出其中的最小值。例：括号内是说明输入3 (repeat=3) 12 6 1 9010 40 30 20-1 -3 -4 -5输出min is 1 (12 6 1 90 中的最小值是1)min is 10 (10 40 30 20 中的最小值是10)min is -5 (-1 -3 -4 -5中的最小值是-5)import java.util.Scanner;public class Test30002 public static void main(String args) int ri, repeat; int a, b, c, d, min; Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri=repeat; ri+) a=in.nextInt(); b=in.nextInt(); c=in.nextInt(); d=in.nextInt(); /*-*/ System.out.println(min is +min); _答案：import java.util.Scanner;public class Test30002 public static void main(String args) int ri, repeat; int a, b, c, d, min; Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri=repeat; ri+) a=in.nextInt(); b=in.nextInt(); c=in.nextInt(); d=in.nextInt(); /*-*/ int m; min=Math.min(a, b); m=min; min=Math.min(m, c); m=min; min=Math.min(m, d); System.out.println(min is +min); 程序填空，不要改变与输入输出有关的语句。输入一个正整数repeat (0repeat10)，做repeat次下列运算：输入三角形的三条边a, b, c，如果能构成一个三角形，输出面积area和周长perimeter；否则，输出“These sides do not correspond to a valid triangle”。在一个三角形中，任意两边之和大于第三边。三角形的面积计算公式：aere*area = s(s-a)(s-b)(s-c)其中:s = (a+b+c)/2输出代码:System.out.println(area=+area+;perimeter=+perimeter);System.out.println(These sides do not correspond to a valid triangle); 例：括号内是说明输入2 (repeat=2) 5 5 31 1 4输出area=7.154544;perimeter=13.0These sides do not correspond to a valid triangleimport java.util.Scanner;public class Test30003 public static void main(String args) int ri, repeat; float a, b, c, area, perimeter, s;Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri=repeat; ri+) a=in.nextFloat(); b=in.nextFloat(); c=in.nextFloat(); /*-*/ -答案：import java.util.Scanner;public class Test30003 public static void main(String args) int ri, repeat; float a, b, c, area, perimeter, s; Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ric&a+cb&b+ca) s=(a+b+c)/2; area=(float) Math.sqrt(s*(s-a)*(s-b)*(s-c); perimeter=a+b+c; System.out.println(area=+area+;perimeter=+perimeter); else System.out.println(These sides do not correspond to a valid triangle); 程序填空，不要改变与输入输出有关的语句。输入一个正整数repeat (0repeat10)，做repeat次下列运算：输入整数x，若x大于0，y=1；若x等于0，y=0；否则，y=-1，最后输出y。例：括号内是说明输入3 (repeat=3) 2 -8 0输出1 (x=2时y=1)-1 (x=-8时y=-1)0 (x=0时y=0)import java.util.Scanner;public class Test30004 public static void main(String args) int ri, repeat; int x, y; Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri=repeat; ri+) x=in.nextInt(); /*-*/ System.out.println(y); -答案：import java.util.Scanner;public class Test30004 public static void main(String args) int ri, repeat; int x, y; Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri0) y=1; else if(x=0) y=0; else y=-1; System.out.println(y); 程序填空，不要改变与输入输出有关的语句。输入一个正整数repeat (0repeat10)，做repeat次下列运算：输入一个职工的月薪salary，输出应交的个人所得税tax。tax = rate * (salary-850)当 salary = 850 时，rate = 0%;当 850 salary = 1350 时，rate = 5%;当 1350 salary = 2850 时，rate = 10%;当 2850 salary = 5850 时，rate = 15%;当 5850 salary 时，rate = 20%;例：括号内是说明输入5 (repeat=5)1010.8732098.7680040102850输出tax=8.04tax=6249.75tax=0.0tax=474.0tax=200.0import java.util.Scanner;public class Test30005 public static void main(String args) int ri, repeat; float rate, salary, tax;Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri=repeat; ri+) salary=in.nextFloat(); /*-*/ System.out.println(tax=+(int)(tax*100+0.5)/100.0); -答案：import java.util.Scanner;public class Test30005 public static void main(String args) int ri, repeat; float rate, salary, tax; Scanner in=new Scanner(System.in); repeat=in.nextInt(); for(ri=1; ri=repeat; ri+) salary=in.nextFloat(); /*-*/ if(salary850) tax=0; else if(850salary&salary1350&salary2850&salary=5850) rate=0.15f; tax = rate * (salary-850); else rate=0.2f; tax = rate * (salary-850); System.out.println(tax=+(int)(tax*100+0.5)/100.0); 程序填空，不要改变与输入输出有关的语句。输入一个正整数repeat (0repeat10)，做repeat次下列运算：以下4种水果的单价分别是3.00元/公斤，2.50元/公斤，4.10元/公斤，10.20元/公斤。1 apples2 pears3 oranges4 grapes输入水果的编号，输出该水果的单价。如果输入不正确的编号，显示单价为0。例：括号内是说明输入1 (repeat=1) 3 (oranges的编号) 输出1 apples2 pears3 oranges4 grapesprice=4.1import java.util.Scanner;public class Test30006 public static void main(String args) int ri, repeat; int choice; float price; Scanner in=new Scanner(System.in); repeat=in.nex