#include <stdio.h>
#include <math.h>
int main()
{
int a[101],m,n,i,b=1;
for (i=0;i<=100;i++)
a[i]=i;
printf ("2");
for (i=3;i<100;i=i+2)
{
m=sqrt(i);
for (n=2;n<=m;n++)
{
if ( (a[i] % n) == 0 )break;
if (i>=m+1){
printf("%d",a[i]);
b++;
}
if (b % 5 == 0)printf ("\n");
}
return 0;
}
#include <stdio.h>
#include <math.h>
void main()
{
int a[101],m,n,i,b=1,flag;
for (i=0;i<=100;i++)
a[i]=i;
printf ("2 ");
for (i=3;i<=100;i+=2)
{
m=(int)sqrt(i);
flag=0;
for (n=2;n<=m;n++)
{
if ( (a[i] % n) == 0 )
{
flag=1;
break;
}
}
if(flag==0)
{
printf("%d ",a[i]);
b++;
if (b % 5 == 0)printf ("\n");
}
}
}