How to get the latest value in getchar()?

Question

i am entering input using getchar() function and when i press the enter after entering the input i get the value of c inside loop as good which i entered but when i enter a non-digit and the loop breaks ... the latest value of i entered is a new line which has ASCII value as 10.

how could i possibly retain the digit value . All i want is c to have the digit value after the loop breaks

#include<stdio.h>
#include<ctype.h>
main()
{
  int c =0;
  while(isdigit(c=getchar()))
  {
    printf("c is : %c\n",c);
  }
   printf("latest value of c(ASCII) is : %d\n",c);
}

Answer 1

One way todo this is to add a lag variable and write to this from c every iteration :

#include<stdio.h>
#include<ctype.h>
int main(int argc, char *argv[])
{
  int c = '0', lastchar = 0;
  while(isdigit(c))
  {
    if(!lastchar)
    {   
      printf("c is : %c\n",c);
    }   
    lastchar = c;
    c = getchar();
  }
  printf("latest value of c(ASCII) is : %d\n",lastchar);
  return 0;
}