Find my mistake!

Hi, im a beginner of programming c and this is an exercise from the book The C Programming Language by Bran W. Kernighan and Dennis M. Ritchie, exercise 1-8.
I am trying to simply count the spaces, tabs, new lines of an input. But the problem is, when i compile and run, then type something and enter, nothing comes up. just blanks.
Please find any mistakes or possible solutions!! Thanks.

Code:

---

#include<stdio.h>

main(){
     
    int line=0,tab=0,space=0;
    int input;
   
    while ((input=getchar())!=EOF){
          if (input=='\t'){
          ++tab;
          }
         
          if (input==' '){
          ++space;
          }
         
          if (input=='\n'){
          ++line;
          }
    }
   
    printf ("%2d%2d%2d",space,tab,line);

}

---

Do you know that you need to signal EOF from the keyboard? CTRL-Z in Windows, I believe, CTRL-D in Linux.

In other words, type in some text, some blanks, some tabs, and newlines - whatever, and when you are finished, do EOF from the keyboard, and the program will print the results.

following your advice, it works now.