close
public class IFDemo5 {
public static void main(String[] args) {
int num = (int)(Math.random()*50+50);
boolean flag = true;
for(int i=2;i<= num/2;i++)
{
if(num%i == 0 )
flag=false;
}
if(flag)
System.out.println(num+"質數");
else
System.out.println(num+"非質數");
}
}
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