need some help cleaning code up

[Unregistered]

I have wrote a code for a hangman game which is now compiling and running, only two questions to complete it.
Firstly when it compiles it is running the first printf statement twice each times:
eg instead of choose a letter:
it is running chose a letter: choose a letter:
i have looked over the code and am unable to understand why this is.
Secondly my search function dioesnt seem to be positioning the letters in there correct place. When a letter is in the word it is saying it was found and printing the array of ----- but not placing the letter into it.
Any suggestions how to fix this?

#include <stdio.h>

#define letters 5

int search(const char list[], int letternum, char letter);

int main(void)
{
char word[letters] = {'m','o', 'u', 's', 'e'};
char guess_word[letters] = {'-','-','-','-','-'};
char letter;
int location;


while (guess_word !=word)
{
printf("choose a letter: ");
scanf("%c", &letter);


location = search(word, letters, letter);

if (location >-1)
{
printf("%c was found\n", letter);
for (int i = 0; i<5; i++)
printf("%c ", guess_word[i]);
}
else printf("%c was not found\n", letter);
}
printf("%c \n MOUSE FOUND!! YOU WIN");

return 0;
}

int search(const char guess_word[], int letternum, char letter)
{
int i=0, found;
found=0;
while ( i<5 && !found)
{ if (guess_word[i] ==letter)
found= 1;
else i++;
}
if (found) return i;
else return -1;
}

[Prelude]

while (guess_word !=word)
should be
while ( strcmp ( guess_word, word ) != 0 )

You can't compare two strings/arrays with the == operator, the strcmp function in string.h should be used if you want the program to work as you intend.

-Prelude