Stałe znakowe, przypisanie następnej wartości

/* getword: get next word or character from input */

 int getword(char *word, int lim)

 {
 	int c, getch(void);
 	void ungetch(int);
 	char *w = word;
	
	while (isspace(c = getch()))
 		;
 	if (c != EOF)
 		*w++ = c; // tutaj
 	if (!isalpha(c)) {
 		*w = '\0';
 		return c;
 	}
	 
	for ( ; --lim > 0; w++) 
 	    if (!isalnum(*w = getch())) {
 	        ungetch(*w);
 	        break;
 	     }
	*w = '\0';
 	return word[0];
  }

#include <stdio.h>
#include <stdlib.h>

/* getword: get next word or character from input */

 int getword(char *word, int lim)

 {
 char *w = word;
 *w++=4;
  }
int main()
{
    getword("znak",10);
    return 0;
}

#include <stdio.h>
#include <stdlib.h>

void getword(char* word, int lim)

{
    char* w = word;
    *w++ = 66;
    printf("%s", w);
}
int main()
{
    char word[] = "tak";
    getword(word, 10);

    return 0;
}