public class test{
public static void main (String args[]){
System.out.println("欢迎学习Java语言");
}
}
public class sxh {
public static void main(String[] agrs) {
for (int i = 100; i < 1000; i++) {
int a = i / 100;
int b = i / 10 % 10;
int c = i % 10;
if (Math.pow(a, 3) + Math.pow(b, 3) + Math.pow(c, 3) == i)
System.out.println("水仙花数 : " +i);
}
}
}
import java.util.*;
public class Main {
public static void main(String args[]){
int t =0;
Scanner input = new Scanner(System.in);
t= input.nextInt();
float a[]=new float[t];
float b[]=new float[t];
a[0]=2.0f ;
a[1]=3.0f ;
b[0]=1.0f;
b[1]=2.0f;
int i=0;
if(t>2)
{
for(i=2;i<a.length;i++)
a[i]=a[i-1]+a[i-2];
for(i=2;i<b.length;i++)
b[i]=b[i-1]+b[i-2];
}
float s=0.0f;
for(i=0;i<t;i++)
{ s=s+(a[i]/b[i]);
}
System.out.printf("%.2f",s);
}
}
import java.util.*;
public class Main {
public static void main(String args[]){
Scanner sc = new Scanner(System.in);
double a = sc.nextFloat();
double b = sc.nextFloat();
double c = sc.nextFloat();
double i=1.0f;
double A=0.0f,B=0.0f,C=0.0f;
for(i=1;i<=a;i++)
A=A+i;
for(i=1;i<=b;i++)
B=B+i*i;
for(i=1;i<=c;i++)
C=C+1/i;
double s=0.0f;
s=A+B+C;
System.out.printf("%.2f",s);
}
}
import java.util.*;
public class Main{
public static void main(String args[]){
double x1=0.0f,x2=0.0f;
Scanner sc = new Scanner(System.in);
double a = sc.nextFloat();
if(a<0)
System.out.printf("erorr");
else
{
x2=1.0f;
do
{
x1=x2;
x2=0.5*(x1+a/x1);
}
while(Math.abs(x2-x1)>=1e-5);
System.out. printf("%.3f\n",x2);
}
}}
public class Main {
public static String reverseSort(String str) {
String str2 ="";
for(int i=str.length()-1;i>-1;i--)
str2+= String.valueOf(str.charAt(i));
return str2;
}
public static void main(String[] args) {
String str="123456abcdef";
String sortedStr= reverseSort(str);
System.out.println(sortedStr);
}
}
Java变量现用现定义
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