1、奇数求和问题
import java.io.*;
class x{
public static void main(String args[]){
int sum=0;
for (int i=1;i<100;i+=2)
sum=sum+i;
System.out.println("sum="+sum);
}
}
2、求各种几何体的体积，面积
import java.io.*;
public class Cuboid{
int length,width,height;
public Cuboid(int l,int w,int h){length=l;width=w;height=h;}
public Cuboid(int l,int h){length=width=l;height=h;}
public Cuboid(int h){length=width=height=h;}
public void setLWH(int l,int w,int h){length=l;width=w;height=h;}
public int volume(){return length*width*height;}
public int surfacearea(){return 2*(length*width+width*height+length*height);}
public void display(){
System.out.println("Length="+length+",Width="+width+",Height="+height);
System.out.println("Volume="+volume()+", SurfaceArea="+surfacearea());
}
public static void main(String args[]){
Cuboid c1,c2,c3;
int vol,area;
c1=new Cuboid(1,2,3);c2=new Cuboid(1,3);c3=new Cuboid(3);
vol=c1.volume()+c2.volume()+c3.volume();
area=c1.surfacearea()+c2.surfacearea()+c3.surfacearea();
c1.display(); c2.display(); c3.display();
System.out.println("Total Volume="+vol+",Total surfacearea="+area);
}
}3、数组的定义，赋值，排序,小到大
import java.io.*;
class x{
public static void main(String args[]){
int a[]={11,1,5,2,6,21};
for(int i=0;i
a[j+1]){
int t=a[j];
a[j]=a[j+1];
a[j+1]=t;
}
}
}
System.out.println();
for (int i=0;i='a'&&a<='z')
a=(char)(a-32); 或 a=(char)(a+('A'-'a'));
System.out.println(a);
}catch(Exception e){}
}
}
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