Write a C++ program to generate all the prime numbers between 1 to n, where n is a value supplied by the user.

#include(iostream.h) // place this '<' & '>' instead of '(' & ')' before iostream.h
#include(conio.h)
void main( )
{
int n, x, flag,ct;
clrscr( );
cout<<"Enter the n value:"; cin>> n;
cout<<"Prime Numbers:";
for( ct=1; ct<=n; ct++)
{
x=2; flag=0;
while(x<=ct/2)
{
if(ct%x==0) { flag=1; break; }
x++;
}
if(flag==0)
cout<< ct;
}
getch( );
}

Note:- If u have any doubt regarding this program or logic, please feel free to contact me.