My addition program doesn't work correctly.

Code:

---

int main()
  {
  int total_value=0;
  char mynum;
  do
  {
  printf("Line: ");
  scanf("%c",&mynum);
    mynum+=total_value;
  } while(mynum!='.');
 
  printf("Total values are: %d,mynum);

---

Basically i want the user to enter a word/sentence and from there i will store all the character they enter until they enter a period. If they enter ABC followed by a period. Then i add up all the values (ASCII) including the period.

As of right now, my program only works if the user enters a period, as it'll jump straight to the printf function outside of the loop. And print out "46"

Whats wrong?

> mynum+=total_value;
Does this update total_value?

> printf("Total values are: %d,mynum);
Does this print total_value?