[英]Ascending order and Descending Java
嗨,這是我的問題,我似乎無法正確打印輸出,我想我的代碼中存在邏輯錯誤,當我輸入一個升序編號然后是一個降序時,它不會顯示。 我也是編程的新手。 碼:
import java.util.Scanner;
public class tester {
public static void main(String[] args) {
int n, i, k, j;
int asc = 0,
Scanner x = new Scanner(System.in);
do {
System.out.print("How many numbers to process : ");
k = x.nextInt();
if(k<=1) {
System.out.println("Enter a number greater than 1");
}
} while(k<=1);
System.out.printf("Please enter %d numbers: ",k);
n = x.nextInt();
for(i=0; i<n-1; i++) {
j = x.nextInt();
if( j < n) {
asc++; // is this right?
} else {
asc--;
}
}
if (asc==k) {
System.out.print("Not Growing Up.");
}
if (asc!=k) {
System.out.print("Growing Up.");
}
}
}
這是輸出
Example outputs (what i'm trying to get)
How many numbers to process : 4
Please enter 4 numbers : 1 2 3 4
Growing up.
How many numbers to process : 4
Please enter 4 numbers : 4 3 2 1
Not Growing up.
這是我的問題:
How many numbers to process : 4
Please enter 4 numbers : 1 2 1 3
Growing up. // it should be not growing up.
無需遍歷所有數字。 您可以只檢查以前的數字是否較低(如果增長)。 如果沒有,請打印並返回。 檢查我的示例代碼。
更換
n = x.nextInt();
for (i=0; i<n-1; i++) {
j = x.nextInt();
if( j < n) {
asc++; // is this right?
} else {
asc--;
}
}
if (asc==k) {
System.out.print("Not Growing Up.");
}
if (asc!=k) {
System.out.print("Growing Up.");
}
用
int prev = x.nextInt();
for (i=0; i<k-1; i++) {
j = x.nextInt();
if (j < prev) { System.out.print("Not Growing Up."); return; }
prev = j;
}
System.out.print("Growing Up.");
String numbers = "1 2 3 4"; // Let's take this input for example
int temp = 0; // This use to compare previous integer
boolean isAsc = false; // This store whether the digits is growing up or not
StringTokenizer st = new StringTokenizer(numbers); // Declare StringTokenizer
while (st.hasMoreTokens()) {
int next = Integer.parseInt(st.nextToken()); // Put the first integer in next (1)
if(next > temp){ // if (1) > 0
temp = next; // Assign 1 to temp, next time digit 2 will compare with digit 1
isAsc = true; // Assign the ascending to true
} else
isAsc = false;
}
if(isAsc)
System.out.print("Growing up.");
else
System.out.print("Not growing up.");
}
您可以將用戶輸入像我聲明的變量numbers
一樣存儲為字符串,並將它們分成每個標記以進行比較。
import java.lang.reflect.Array;
import java.util.*;
public class A1 {
public static void main(String[] args) {
int a[]={2,5,0,1};
Arrays.sort(a);
int b= a.length;
for(int i=0;i<a.length;i++)
{
System.out.println(+a[i]+"\t"+a[b-1]);
b--;
}
}
}
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