public class WanShu { public static void main (String args[]) { int sum,n,i; for (n=2;n<=1000;n++) { sum=0; for(i=1;i<=n/2;i++) if (n%i==0) sum+=i; if (sum==n) System.out.println (n+","); } } }
public class Wanshu { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub for (int i = 1; i <=1000; i++) { if (Panduan(i)==i) { System.out.println(i); } } }
public static int Panduan (int n){ int sum=0; int b=n; for (int i = 1; i <=b/2; i++) { if (n%i==0) { sum+=i; } } return sum; } }
public static int Panduan (int n){ int sum=0; int b=n; for (int i = 1; i <= b/2; i++) { if (n%i==0) { sum += (i + n / i); } } return sum; }2楼的,我觉得应该改进为: public static int Panduan (int n){ int sum=0; for (int i = 1; i <= sqrt(float(n)); i++) { if (n%i==0) { sum+=i; } } return sum; }
public static void main (String args[]) {
int sum,n,i;
for (n=2;n<=1000;n++)
{
sum=0;
for(i=1;i<=n/2;i++)
if (n%i==0) sum+=i;
if (sum==n)
System.out.println (n+",");
}
}
}
public class Wanshu { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
for (int i = 1; i <=1000; i++) {
if (Panduan(i)==i) {
System.out.println(i);
}
}
}
public static int Panduan (int n){
int sum=0;
int b=n;
for (int i = 1; i <=b/2; i++) {
if (n%i==0) {
sum+=i;
}
}
return sum;
}
}
int sum=0;
int b=n;
for (int i = 1; i <= b/2; i++) {
if (n%i==0) {
sum += (i + n / i);
}
}
return sum;
}2楼的,我觉得应该改进为:
public static int Panduan (int n){
int sum=0;
for (int i = 1; i <= sqrt(float(n)); i++) {
if (n%i==0) {
sum+=i;
}
}
return sum;
}
for(num=1;num<=1000;num++)
{
for(j=1;j<=num;j++)
{
if(num%j==0)
{
sum+=j;
}
}
if(num==sum/2)
{
printf("%d\n",num);
}
sum=0;
}
public static void main(String[] args) {
int sum = 0;
for(int i = 1;i <= 1000;i++) {
for(int j = 1;j < i;j++) {
if(i%j == 0){
sum += j;
}
}
if(sum == i) {
System.out.println(i + "是完数");
}
sum = 0;
} }
}
public class wanshu {
public static void main(String [] args) {
for(int i=1;i<=1000;i++) {
int sum=0;
for(int j=1;j<i;j++) {
if(i%j==0)
sum+=j;
}
if(sum==i) {
System.out.print(i+"是完数因子为:");
for(int j=1;j<i;j++) {
if(i%j==0)
System.out.print( j+",");
}
System.out.println();
}
}
}
}