10.16. Write a program that displays first n prime.

#include<stdio.h> 

#include<conio.h>
#include <math.h>
void main ()

{
long i, j, n, t,p, a[10000]; 

int isprime;
clrscr();
printf ("How many prime numbers: "); 

scanf ("ld",&n);

p=0;
for (i=2; p<n; i++)
isprime=1; t=sqrt(i); 

for (j=2; j<=t; j++) 

if (i%j==0)

{
isprime=0;
break;

}
if (isprime==1) 

a[p++]=i;
for (i=0; i<n; i++) 

printf("%101d", a[i]); 

getch();

}