late night coding

[caroundw5h]

As the title suggest i'm coding at late o'clock over here and My code just hangs. I'm sure its something simple but I'd like to get it before bed.
thanks.

/* my getWord.c 
GetWord reads characters from stdin up until the first space. it stores it in its
argument a char * and appends a '\n' then returns the word */
#include <stdio.h>
#include <string.h>
#define STOP ' '
#define SIZE 100

char *GetWord(char *);
int main(void){
    char store[SIZE];
    
   char *word = GetWord(store);
    printf("The word is %s", word);
    getchar();
    return 0;
}

char *GetWord(char vault[]){
    int ch,ndx=0;
    while( (ch = getchar()) !=STOP || ch !=EOF){
         vault[ndx] = ch;
        ndx+=1;
    }
    vault[ndx] = '\0';
    while(getchar() !='\n');
    return vault;
}