TruTra
14-05-2009, 09:19 AM
#include<iostream.h>
int main()
{
int n,i=2,j=2;
cout<<"Nhap vao so n ";
cin>>n;
for(i=2;i<=n;i++)
for(j=2;j<=i;j++)
if((i%j==0)&&(i!=j))
break;
else if(i==j)
cout<<i;
return 0;
}
// xay dung thuat toan nhu sau
// nhap vao so n sau do cho i chay tu 2 den n va in ra 2
//kiem tra i%2==0.Neu = 0 ko phai,neu khac 0 thi kiem tra tiep i%3
//de lam dc nhu the ta se co them 1 bien khac chay tu 2 den i-1
// viec lam se dien ra cho den khi i%j==0 se in ko in ra ket qua
// nguoc lai in ra so nguyen to
int main()
{
int n,i=2,j=2;
cout<<"Nhap vao so n ";
cin>>n;
for(i=2;i<=n;i++)
for(j=2;j<=i;j++)
if((i%j==0)&&(i!=j))
break;
else if(i==j)
cout<<i;
return 0;
}
// xay dung thuat toan nhu sau
// nhap vao so n sau do cho i chay tu 2 den n va in ra 2
//kiem tra i%2==0.Neu = 0 ko phai,neu khac 0 thi kiem tra tiep i%3
//de lam dc nhu the ta se co them 1 bien khac chay tu 2 den i-1
// viec lam se dien ra cho den khi i%j==0 se in ko in ra ket qua
// nguoc lai in ra so nguyen to