TQC+ JAVA 迴圈 301 ~ 310

TQC+ JAVA6 試題總覽：LINK
Github 備份：LINK

	/* TQC+ JAVA6 - 301 */
	import java.util.*;
	class JPA301 {
	public static void main(String argv[]) {
	System.out.println("Input:");
	int tm =new Scanner(System.in).nextInt();
	int sum = 0 ;
	//從1開始加，且變數會一直+1再加入總和，直到變數大於使用者輸入的數便停止
	for (int a=1;a<=tm ; a++) {
	sum = sum+a;
	}
	System.out.printf("1 + ... + %d = %d",tm,sum);
	}
	}

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	/* TQC+ JAVA6 - 302 */
	import java.util.Scanner;
	public class JPA302 {
	public static void main(String[] args) {
	int i = 1, j = 1, count = 0;
	for (i = 1; i <= 3; i++) {//第一個迴圈，i從1到3，執行三圈
	for (j = 1; j <= 9; j++)//第一個迴圈，j從1到9，執行九圈
	count++;//每跑一次，便+1
	}
	System.out.printf("count = %d\n", count);
	}
	}

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	/* TQC+ JAVA6 - 303 */
	public class JPA303 {
	public static void main(String[] args) {
	int i, j, sum = 0;
	System.out.printf("1~1000中的完美數有: ");
	for (j=2;j<1000;j++){//第一層迴圈從2跑到1000
	sum=0;
	for (i=1;i<j;i++) //第二層迴圈從1跑到第一層迴圈的數字便停止
	if(j%i==0)//在其中，若有兩數相為j的因數，則將它加入總和中
	sum = sum + i;
	//若最後的總合等於本身該數，則印出銀幕來
	if(sum==j)
	System.out.printf("%d ",j);
	}
	}
	}

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	/* TQC+ JAVA6 - 304 */
	import java.util.Scanner;
	public class JPA304 {
	public static void main(String[] args) {
	int total = 0;
	int s = 0;
	int count =0;
	double average;
	//先在迴圈外面要求使用這輸入
	System.out.print("Please enter meal dollars or enter -1 to stop: ");
	s = new Scanner(System.in).nextInt();
	//進入迴圈時會檢查，使否符合條件
	while(s!=-1){
	//進入迴圈後，第一件事便是進行運算
	count++;
	total = total +s;
	//運算完後再次要求使用者輸入
	System.out.print("Please enter meal dollars or enter -1 to stop: ");
	s = new Scanner(System.in).nextInt();
	}
	average = (double)total/count;
	System.out.println("餐點總費用:" + total);
	System.out.printf(" %d 道餐點平均費用為: %.2f %n",count,average);
	}
	}

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	/* TQC+ JAVA6 - 305 */
	import java.util.Scanner;
	public class JPA305 {
	static Scanner keyboard = new Scanner(System.in);
	public static void main(String[] args) {
	test();
	test();
	test();
	}
	public static void test() {
	System.out.print("Please enter one value:");
	Scanner sc = new Scanner(System.in);
	int a = sc.nextInt();
	int sum=1;
	//條件判斷，是否在使用者輸入值1~10之間
	if(a>0&&a<=10)
	{
	//進行階乘運算
	for(int t=1 ; t<=a ; t++)
	sum = sum*t;
	System.out.printf("%d! : %d\n",a,sum);
	}
	else
	System.out.printf("Error, the value is out of range.");
	}
	}

view raw TQCplus_JAVA_305 hosted with ❤ by GitHub

	/* TQC+ JAVA6 - 306 */
	import java.util.*;
	public class JPA306 {
	public static void main (String argv[]){
	int num1, num2;
	Scanner input = new Scanner(System.in);
	//先在迴圈外面請使用者輸入第一個數字
	System.out.println("Input:");
	num1 = input.nextInt();
	//檢查第一個數字是否符合條件
	while (num1 != 999) {
	//再請使用者輸入第二個數字
	num2 = input.nextInt();
	System.out.println(powerOf(num1, num2));
	//之後再請使用者從頭輸入第一個數字
	System.out.println("Input:");
	num1 = input.nextInt();
	}
	}
	//N次方運算方法
	static int powerOf (int m, int n) {
	//因Math.pow()的回傳值為doubel，故結果必須將它強制轉型為int
	return (int) (Math.pow(m,n));
	}
	}

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	/* TQC+ JAVA6 - 307 */
	import java.util.Scanner;
	public class JPA307 {
	public static void main (String argv[]){
	int num1, num2;
	//先讓使用者在迴圈外面輸入兩個數字
	System.out.println("Input:");
	num1 = new Scanner(System.in).nextInt();
	num2 = new Scanner(System.in).nextInt();
	//若條件不符合便不會進入迴圈
	while (num1!=999) {
	//一進會迴圈後，會先執行一次gcd方法
	System.out.println(gcd(num1,num2));
	//使用者再次輸入兩個數字，供下次迴圈判斷
	System.out.println("Input:");
	num1 = new Scanner(System.in).nextInt();
	num2 = new Scanner(System.in).nextInt();
	}
	}
	//gcd求最大公因數演算法
	static int gcd (int m, int n) {
	int tmp;
	while (m % n != 0) {
	tmp = n;
	n = m % n;
	m = tmp;
	}
	return n;
	}
	}

view raw TQCplus_JAVA_307 hosted with ❤ by GitHub

	/* TQC+ JAVA6 - 308 */
	//本題要求使用do-while-loop
	import java.util.Scanner;
	public class JPA308 {
	static Scanner keyboard = new Scanner(System.in);
	static int i = -1;
	public static void main(String[] args) {
	int total = 0, s = 0;
	//do-while-loop的特性是部會先檢查條件，一定會先強行執行一次
	do {
	System.out.print("請輸入消費金額，或輸入-1結束:");
	total = total +s;
	//因我們是透過使用者輸入-1來判斷結束，所以-1此數值不可加入運算，故將它擺在後頭，使他無作用時
	//會直接被條件是擋掉而跳離迴圈
	s = new Scanner(System.in).nextInt();
	} while(s!=-1);
	System.out.print("電腦周邊總消費:" + total);
	}
	}

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	/* TQC+ JAVA6 - 309 */
	import java.util.Scanner;
	class JPA309 {
	public static void main(String argv[]){
	int size = new Scanner(System.in).nextInt();
	int sum = 0;
	//累加的迴圈
	for(int a=1 ;a<=size;a++) {
	//條件判斷，當a整除3或者整除5，則進入處理
	if(a%3==0 ||a%5==0) {
	//當在此判斷中，符合a整除7的數字，則直接結束該次迴圈以下的所有程式碼，從下一個迴圈開始
	if(a%7==0)
	continue;
	sum = sum +a;
	}
	}
	System.out.println("Answer: " + sum);
	}
	}

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	/* TQC+ JAVA6 - 310 */
	//此題題目要求使用do-while-loop
	import java.util.Scanner;
	public class JPA310 {
	static Scanner keyboard = new Scanner(System.in);
	public static void main(String[] args) {
	int init = 2,sum=0;
	int size = 0;
	//先讓使用者輸入n值
	System.out.println("請輸入n的值(n>0，且為偶數)：");
	size = new Scanner(System.in).nextInt();
	//檢查n值是否大於零且為偶數，若不符合便一再重新要求輸入
	while(size<=0||size%2!=0) {
	System.out.print("請輸入n的值(n>0，且為偶數)：");
	size = new Scanner(System.in).nextInt();
	}
	//開始進行累加動作
	do{
	sum = init +sum;
	init += 2;
	}while(init<=size);//當累加用的變數大於使用者輸入的值便停止
	System.out.printf("%d+%d+...+%d=%d", 2,4,size,sum);
	}
	}

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TQC+ JAVA6 試題總覽：LINK
Github 備份：LINK

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