Program to generate Prime numbers from 1 to n

#include<stdio.h>
void main()
{
     int num,i=1,j,count;
     clrscr();


          printf("Enter Num value To Print Prime Numbers between 1 and Num: ");
          scanf("%d",&num);


    printf("Prime Numbers upto %d :\n \n",num);

    while(i<=num)
    {
        count=0; // initializing count to 0 for each iteration
                for(j=1;j<=i;j++)
                {
                    if(i%j==0) //checking whether num is dvisible by j
                       count++;
                }
                    if(count==2) //if num is divisible by 2 numbers,then it is prime
                     printf("%d ",i);
                    i++;
   }
printf("\n\n");
getch();
}