No output in word count program in C -

i new learner of c language. got know getchar() function. wrote program count number of words in input. program goes follows: (i using codeblocks):

#include <stdio.h>  main(){ int c, nw;       /*nw stands number of words*/  while((c=getchar())!=eof){     if (c==' '||c=='\t'||c=='\n')         ++nw;  }  printf("number of words are:%d",nw); } 

when run program, takes input, there no output. keeps on taking input no matter how many times press enter.

i tried search million times couldn't find answer.

however, told me include ctrl+d break in while loop. tried same result.

please if has solution me. past 2 weeks trying figure out problem.

thanks!

your loop end when encounters eof(-1).

it keeps on taking input no matter how many times press enter.

because '\n' != eof.

to stimulate eof,

• press ctrl+z if using windows/dos. must followed enter
• press ctrl+d if on unix/linux/osx. flushes stdin there characters flushed. otherwise, sends eof stdin.

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btw, others have noticed, need initialize nw 0. also, signature of main should int main(void).