存货周转天数【编程题】Java编程题四（10道）-Java帮帮

【编程题】Java编程题四（10道）-Java帮帮李基弘

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【编程题】Java编程题四（10道）”
【程序31】题目：将一个数组逆序输出。import java.util.*;public class lianxi31 {public static void main(String[] args) { Scanner s = new Scanner(System.in); int a[] = new int[20];System.out.println("请输入多个正整数（输入-1表示结束）："); int i=0,j; do{ a[i]=s.nextInt(); i++; }while (a[i-1]!=-1); System.out.println("你输入的数组为："); for( j=0; j<i-1; j++) { System.out.print(a[j]+" ");} System.out.println("\n数组逆序输出为："); for( j=i-2; j>=0; j=j-1) { System.out.print(a[j]+" ");} } }
【程序32】题目：取一个整数a从右端开始的4～7位。import java.util.*;public class lianxi32 {public static void main(String[] args) { Scanner s = new Scanner(System.in); System.out.print("请输入一个7位以上的正整数："); long a = s.nextLong(); String ss = Long.toString(a); char[] ch = ss.toCharArray(); int j=ch.length; if (j<7){System.out.println("输入错误！");} else { System.out.println("截取从右端开始的4～7位是："+ch[j-7]+ch[j-6]+ch[j-5]+ch[j-4]); } } }
【程序33】题目：打印出杨辉三角形（要求打印出10行如下图） 1 1 1 1 2 1 1 3 3 1 1 4 6 4 11 5 10 10 5 1…………public class lianxi33 {public static void main(String[] args) { int[][] a = new int[10][10]; for(int i=0; i<10; i++) { a[i][i] = 1; a[i][0] = 1; } for(int i=2; i<10; i++) { for(int j=1; j<i; j++) { a[i][j] = a[i-1][j-1] + a[i-1][j]; } } for(int i=0; i<10; i++) { for(int k=0; k<2*(10-i)-1; k++) { System.out.print(" "); } for(int j=0; j<=i; j++) { System.out.print(a[i][j] + " "); } System.out.println(); }}}
【程序34】题目：输入3个数aqq迅家园 ,b,c，房仕德 存货周转天数 按大小顺序输出。import java.util.Scanner;public class lianxi34 {public static void main(String[] args) { Scanner s = new Scanner(System.in); System.out.println("请输入3个整数："); int a = s.nextInt(); int b = s.nextInt(); int c = s.nextInt(); if(a < b) { int t = a; a = b; b = t; } if(a < c) { int t = a; a = c; c = t; } if(b < c) { int t = b; b = c; c = t; } System.out.println("从大到小的顺序输出:"); System.out.println(a + " " + b + " " + c);}}
【程序35】题目：输入数组恒阳花苑，最大的与第一个元素交换，最小的与最后一个元素交换罗天婵 ，输出数组。import java.util.*;public class lianxi35 {public static void main(String[] args) { int N = 8; int[] a = new int [N]; Scanner s = new Scanner(System.in); int idx1 = 0楼住有情人, idx2 = 0; System.out.println("请输入8个整数："); for(int i=0; i<N; i++) { a[i] = s.nextInt();} System.out.println("你输入的数组为："); for(int i=0; i<N; i++) { System.out.print(a[i] + " "); } int max =a[0]青梅酒的做法 , min = a[0]; for(int i=0; i<N; i++) { if(a[i] > max) { max = a[i]; idx1 = i; } if(a[i] < min) { min = a[i]; idx2 = i; } } if(idx1 != 0) { int temp = a[0]; a[0] = a[idx1]; a[idx1] = temp; } if(idx2 != N-1) { int temp = a[N-1]; a[N-1] = a[idx2]; a[idx2] = temp; } System.out.println("\n交换后的数组为："); for(int i=0; i<N; i++) { System.out.print(a[i] + " "); }}}
【程序36】题目：有n个整数，使其前面各数顺序向后移m个位置，最后m个数变成最前面的m个数import java.util.Scanner;public class lianxi36 {public static void main(String[] args) { int N =10; int[] a = new int[N]; Scanner s = new Scanner(System.in); System.out.println("请输入10个整数："); for(int i=0; i<N; i++) { a[i] = s.nextInt(); } System.out.print("你输入的数组为："); for(int i=0; i<N; i++) { System.out.print(a[i] + " "); } System.out.print("\n请输入向后移动的位数："); int m = s.nextInt(); int[] b = new int[m]; for(int i=0; i<m; i++) { b[i] = a[N-m+i]; } for(int i=N-1; i>=m; i--) { a[i] = a[i-m]; } for(int i=0; i<m; i++) { a[i] = b[i]; }System.out.print("位移后的数组是："); for(int i=0; i<N; i++) { System.out.print(a[i] + " "); }}}
【程序37】题目：有n个人围成一圈，顺序排号。从第一个人开始报数（从1到3报数），凡报到3的人退出圈子忻尚永 ，问最后留下的是原来第几号的那位龙园意境小学 。import java.util.Scanner;public class lianxi37 {public static void main(String[] args) { Scanner s = new Scanner(System.in); System.out.print("请输入排成一圈的人数："); int n = s.nextInt(); boolean[] arr = new boolean[n]; for(int i=0; i<arr.length; i++) { arr[i] = true; } int leftCount = n; int countNum = 0; int index = 0; while(leftCount > 1) { if(arr[index] == true) { countNum ++; if(countNum == 3) { countNum =0; arr[index] = false; leftCount --; } } index ++; if(index == n) { index = 0; } } for(int i=0; i<n; i++) { if(arr[i] == true) { System.out.println("原排在第"+(i+1)+"位的人留下了。"); } }}}
【程序38】题目：写一个函数姚艺龙，求一个字符串的长度，在main函数中输入字符串汉京峰景苑，并输出其长度。import java.util.*;public class lianxi38 {public static void main(String[] args) { Scanner s = new Scanner(System.in); System.out.println("请输入一个字符串："); String str = s.nextLine(); System.out.println("字符串的长度是："+str.length()); } }
【程序39】题目：编写一个函数，输入n为偶数时戆夫成龙，调用函数求1/2+1/4+...+1/n傲蕾一兰,当输入n为奇数时，调用函数1/1+1/3+...+1/n(利用指针函数)//没有利用指针函数import java.util.*;public class lianxi39 {public static void main(String[] args) { Scanner s = new Scanner(System.in); System.out.print("请输入一个正整数 n= "); int n = s.nextInt(); System.out.println("相应数列的和为：" + sum(n)); }public static double sum(int n) { double res = 0; if(n % 2 == 0) { for(int i=2; i<=n; i+=2) { res += (double)1 / i; } } else { for(int i=1; i<=n; i+=2) { res += (double)1 / i ; } } return res;}}
【程序40】题目：字符串排序嫡孤。public class lianxi40 {public static void main(String[] args) { int N=5; String temp = null; String[] s = new String[N]; s[0] = "matter"; s[1] = "state"; s[2] = "solid"; s[3] = "liquid"; s[4] = "gas"; for(int i=0; i<N; i++) { for(int j=i+1; j<N; j++) { if(compare(s[i], s[j]) == false) { temp = s[i]; s[i] = s[j]; s[j] = temp; } } } for(int i=0; i<N; i++) { System.out.println(s[i]); }}static boolean compare(String s1, String s2) { boolean result = true; for(int i=0; i<s1.length() && i<s2.length(); i++) { if(s1.charAt(i) > s2.charAt(i)) { result = false; break; } else if(s1.charAt(i) <s2.charAt(i)) { result = true; break; } else { if(s1.length() < s2.length()) { result = true; } else { result = false; } } } return result;}}
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