编程逻辑20题+java版答案完美版

适合编程初学的逻辑编程练习20题+答案,整理成java文件,下载即可执行,完美版!

import java.util.Scanner;

public class ForExercise
{
public static void main(String[] args)
{
// Test1();
// Test2();
// Test3();
// Test4();
// Test5();
// Test6();
// Test7();
// Test8();
// Test9();
// Test10();
// Test11();
// Test12();
// Test13();
// Test14();
// Test15();
// Test16();
// Test17();
// Test18();
Test19();
}

public static void Test1()
{
System.out.println("1.打印九九乘法表:");
for (int i = 1; i < 10; i++)
{
for (int j = 1; j <= i; j++)
{
int a = j * i;
System.out.print(j + "*" + i + "=" + a + " ");
}
System.out.println();
}
System.out.println();
}

public static void Test2()
{
System.out.println("2.输入一个数字判断他是奇数还是偶数:");
Scanner er = new Scanner(System.in);
System.out.println("请您输入一个整数：");
int a = er.nextInt();
if (a % 2 == 0)
System.out.println("您输入的" + a + "是一个偶数");
else
System.out.println("您输入的" + a + "是一个奇数");
System.out.println();
}

public static void Test3()
{
System.out.println("3.求解1到100之间的偶数");
for (int a = 1; a <= 100; a++)
{
if (a % 2 == 0)
System.out.print("1到100之间的偶数: " + a + "; ");
}
System.out.println();
}

public static void Test4()
{
System.out.println("4.一次酒店宴席安排宾客就座吃饭，5人一桌剩4人，7人一桌剩6人，9人一桌剩8人，11人一桌正好。问宴席共最少有多少人");
int s = 0;
for (int i = 1;; i++)
{
if (i % 5 == 4 && i % 7 == 6 && i % 9 == 8 && i % 11 == 0)
{
s = s + 1;
if (s == 1)
{
System.out.println("宴会最少" + i + "人");
break;
}
}
}
System.out.println();
}

public static void Test5()
{
System.out.println("5.求1到100之间的素数(能被1和他本身整除的数)");
for (int i = 1; i <= 100; i++)
{
int b = 0;
for (int j = 1; j <= i; j++)
{
if (i % j == 0)
b = b + 1;
}
if (b == 2)
System.out.print("素数: " + i + "; ");
}
System.out.println();
}

public static void Test6()
{
System.out.println("6.1到10的乘积之和");
int sum = 0;
for (int i = 1; i <= 10; i++)
{
for (int j = 1; j <= 10; j++)
sum = sum + i * j;
}
System.out.println("1到10的乘积之和:" + sum);
System.out.println();
}

public static void Test7()
{
System.out.println("7.笼子里一共有鸡和兔子35只，一共有94条退，笼子里一共有鸡和兔子共多少只");
for (int i = 0; i <= 35; i++)
{
for (int j = 0; j <= 35 - j; j++)
{
if (i + j == 35 && (2 * i + 4 * j == 94))
System.out.println(i + "
只鸡" + j + "只兔子");
}
}
System.out.println();
}

public static void Test8()
{
System.out.println("8.键盘输入3个值便将这三个值从小到大打

适合编程初学的逻辑编程练习20题+答案,整理成java文件,下载即可执行,完美版!

印出来.");
Scanner xin = new Scanner(System.in);
System.out.println("请您输入三个整数：");
int a = xin.nextInt();
int b = xin.nextInt();
int c = xin.nextInt();
if (a > b)
{
int d = a;
a = b;
b = d;
}
if (b > c)
{
int d = b;
b = c;
c = d;
}
if (a > b)
{
int d = a;
a = b;
b = d;
}
System.out.println("您输入的三个数字从小到大依次为：" + a + " " + b + " " + c);
System.out.println();
}

public static void Test9()
{
System.out.println("9.有一分数序列：2/1，3/2，5/3，8/5，13/8，21/13...求出这个数列的前20项之和");
int a = 1, b, dang, qian;
double sum = 0, er, yi;
dang = a;
qian = dang;
for (int i = 1; i <= 20; i++)
{
er = dang;
b = dang;
dang = dang + qian;
yi = dang;
qian = b;
sum = sum + yi / er;
}
System.out.println("前20项之和是：" + sum);
System.out.println();
}

public static void Test10()
{
System.out.println("10.输入一个大于6的偶数,可以拆分为两个素素相见的和的形式");
Scanner sr = new Scanner(System.in);
System.out.println("请您输入一个大于6的偶数：");
int a = sr.nextInt();
for (int i = 1; i <= a; i++)
{
int b = 0;
for (int j = 1; j <= i; j++)
{
if (i % j == 0)
b = b + 1;
}
if (b == 2)
{
for (int c = 1; c <= a; c++)
{
int d = 0;
for (int j = 1; j <= c; j++)
{
if (c % j == 0)
d = d + 1;
}
if (d == 2)
{
if (i + c == a && i <= c)
System.out.println("您输入的：" + a + "可以拆分为：" + i + "+" + c);
}
}
}
}
System.out.println();
}

public static void Test11()
{
System.out.println("11.打印一个三角型:");
System.out.println(" *");
System.out.println(" ***");
System.out.println(" *****");
for (int i = 1; i <= 4; i++)
{
for (int j = 1; j <= 8 - 2 * i; j++)
{
System.out.print(" ");
}
for (int a = 1; a <= 2 * i - 1; a++)
{
System.out.print("*");
}
System.out.println();
}
System.out.println();
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