仅允许对变量进行手动算法。列表,数组等集合不能使用。 (我在程序中使用了.length()函数,但可以通过在每次输入后放置一个空格并计算字符数来手动完成,直到找到空格为止。
答案 0 :(得分:0)
使用数组解决的问题是存储用户输入的任意数量的值。这可以通过将值存储在字符串中来解决。由于我们必须知道要从字符串中选择多少个字符来形成数字,我还将数字的长度存储在一个单独的字符串中(长度通常只有1位数,所以我们&# 39; d肯定知道第n个数字的长度将在lengthstorage字符串中的第n个字符处。)
算法:
import java.util.Scanner;
class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String input,inputstorage,lengthstorage,inputlength;
int nonrep=0;
System.out.println("Enter the number of values");
int n = sc.nextInt();
int fmedian=0,smedian=0;
System.out.println("Enter a value");
input= sc.next(); //String
inputlength = "" + (char)(input.length()+48);
inputstorage = input;
lengthstorage = inputlength;
for (int i=1; i<n; i++)
{
System.out.println("Enter a value");
input = sc.next();
inputstorage = inputstorage + input;
lengthstorage = lengthstorage + (char)(input.length()+48);
}
int mainnumpos = 0;
for(int j=0;j<n;j++)
{
int copy=0;
int mainnumlength = lengthstorage.charAt(j) - 48;
int neg=0,pos=0;
int mainnum = 0; int factor = 1;int mainnumsign = 0;
for (int m =mainnumlength-1; m >= 0; m--)
{
if(inputstorage.charAt(mainnumpos+m)=='-')
{
mainnumsign = 1;
}
else
{
mainnum += (inputstorage.charAt(mainnumpos+m) - '0') * factor;
factor *= 10;
}
}
mainnumpos = mainnumpos + mainnumlength;
if(mainnumsign==1)
{
mainnum = -mainnum;
}
int position = 0;
for (int q=0;q<n;q++)
{ int fnumsign = 0;
int fnumlength = lengthstorage.charAt(q) - 48;
int fnum = 0;
factor = 1;
for (int l =fnumlength-1; l >= 0; l--)
{
if(inputstorage.charAt(position+l)=='-')
{
fnumsign = 1;
}
else{
fnum += (inputstorage.charAt(position+l) - '0') * factor;
factor *= 10;
}
}
if(fnumsign==1)
{
fnum = -fnum;
}
if((mainnum-fnum)>0)
{
pos++;
}
else if((mainnum-fnum)<0)
{
neg++;
}
else{
copy++;
}
position = position + fnumlength;
}
if((n%2)!=0){
if((double)(pos+copy)>=((double)n)/2.0 && (double)(neg+copy)>=((double)n)/2.0)
{
if(nonrep==0)
{
System.out.println("The median is: "+ mainnum);
nonrep++;
}
}
}
else
{
if ((double)(pos+copy)==(double)n/2.0)
{
fmedian=mainnum;
}
else if((double)(neg+copy)==(double)n/2.0)
{
smedian = mainnum;
}
else if((double)(pos+copy)>=(double)n/2.0 && (double)(neg+copy)>=(double)n/2.0 )
{
fmedian = mainnum;
smedian = mainnum;
}
if(j==n-1){
double evenmedian = ((double)(smedian + fmedian))/2.0;
System.out.println("The median is: "+evenmedian);
}
}
}
}
}