C Program for Level Sketch

C Level Sketch:

#include<stdio.h>
#include<conio.h>
#include<math.h>
int main()
{
 float th,ov, HH,H,L,LL,lowTap,UpTap,CC,HH1,H1,L1,LL1,HHper,Hper,Lper,LLper,BtTap;
 char ch;
 do
 {
 printf("\nEnter Tank Height in mm:");
 scanf("%f",&th);
 printf("\nHeight of HH:");
 scanf("%f",&HH);
 printf("\nHeight of H:");
 scanf("%f",&H);
 printf("\nHeight of L:");
 scanf("%f",&L);
 printf("\nHeight of LL:");
 scanf("%f",&LL);
 printf("\nEnter Height of Overflow Nozzle (if required):");
 scanf("%f",&ov);
 if (ov != 0)
 {
  th = ov;
 }
 else
 {
  th = th;
 } 

  printf("Height Valid: %.2f",th);
  HHper = (HH * 100)/th;
  Hper = (H * 100)/th;
  Lper = (L * 100)/th;
  LLper = (LL * 100)/th;
 
 if (HHper < 90 && LLper > 10)
  {
   printf("\nAlarm Positions are Valid.");
  }
  else
  {
   printf("\nChange Alarm Positions.");
  }
 
 printf("\nEstimate Lower Tapping Height:");
 scanf("%f",&lowTap);
 printf("\nEstimate Upper Tapping Height:");
 scanf("%f",&UpTap);
 printf("\nEstimate Bottom Pipe(Enter zero if not required):");
 scanf("%f",&BtTap);
 if (BtTap == 0)
 {
  CC = UpTap - lowTap;
  HH1 = HH - lowTap;
  H1 = H - lowTap;
  L1 = L - lowTap;
  LL1 = LL - lowTap;
 }
 else
 {
  CC = UpTap + BtTap;
  HH1 = HH + BtTap;
  H1 = H + BtTap;
  L1 = L + BtTap;
  LL1 = LL + BtTap;
 }
 printf("\n C-C Distance is %f",CC);
 HHper = (HH1 * 100)/CC;
 Hper = (H1 * 100)/CC;
 Lper = (L1 * 100)/CC;
 LLper = (LL1 * 100)/CC;
 printf("\nHH percentage: %.2f",HHper);
 printf("\nH percentage: %.2f",Hper);
 printf("\nL percentage: %.2f",Lper);
 printf("\nLL percentage: %.2f",LLper);
 if (HHper < 90 && LLper > 10)
 {
  printf("\nTapping Positions are Valid.");
 }
 else
 {
  printf("\nChange Tapping Positions.");
 }
 printf ("\n\nDo you want to repeat the operation Y/N: ");
  scanf (" %c", &ch);
 }
 while (ch == 'y' || ch == 'Y');
 
 return 0;
}