Finding prim number

#include < stdio.h>
#include < conio.h>
#include < math.h>
main()
{
     int A,B,C=0,D;
     printf("Program for finding Prime Number!\n\n\t you enter D=");
     scanf("%d",&D);
     printf("\nSo, prime number which is less than %d is...\n\n ",D);
     printf("2\n");
     for(A=3;A<=D;A+=2)          {                         for(B=3;B<=sqrt(A);B+=2)                            {if(A%B==0)                             break;}                         if(B>sqrt(A))
                        { printf("%d\n",A);
                        C+=1;
                         }
                      
        }
   
     printf("\n\n\t***There are %d.\n\n\n\r",C+1);
    getch();
}