C Program To Find Prime numbers in given range

#include<stdio.h>
#include<conio.h>
void main()
{
int m,n,i,c;
clrscr();
printf("enter first limit: ");
scanf("%d",&m);
printf("enter last limit: ");
scanf("%d",&n);
printf("\nPrime numbers upto %d\n",n);
while(m<=n)
{
 i=1;
 c=0;
 while(i<=m)
 {
  if(m%i==0)
  {
  c++;
  }
  i++;
 }

 if(c==2)
 printf("%d\n",m);
 m++;
}
getch();
}