Bug in a simplified (and incomplete) version of hangman game - c

Question

I have written a first version of hangman. The game will be completed later, when this part of code will work.
The code:
#include <stdio.h>
#include <conio.h>
int main()
{
char word[]={"name"};
char word0[]={"----"};
char lett;
int i;
int c;
int e=0;
while(e<12)
{
gotoxy(2,2);
printf("\n%s\n",word0);
scanf("%c",&lett);
for(i=0,c=0;i<4;i++)
{
if(lett==word[i])
{
word0[i]=word[i];
c++;
}
}
printf("%d",c);
if(c==0)
{
e++;
printf("%d",e);
}
}
printf("You lose");
getchar();
}
The program ends before I make 12 errors and prints two values per cycle (not 1, which it should do) which don't coincide with the actual number of errors. Why?

Answer 1

The second 'cycle', as you call it, is reading the newline character. Try changing your scanf to this:
scanf("%c\n",&lett);

Answer 2

The second entry you get is the new line when you press, says, "a", then "Enter". The "Enter" is a new char which is then processed by your program.
Instead of using scanf("%c",&lett);, use scanf(" %c",&lett); (with a space before the '%' => this will ignore any spaces, new lines, etc.

Answer 3

Some minor changes make the code work.
Note that I had to change the I/O a bit (don't have gotoxy() function, and no interactive input since I was running this on codepad.org). See where the logic of your code is different and you should have your solution.
I added intermediate printf statements so you can follow the flow more clearly - usually a good idea when you are debugging.
Note - you might want to use case insensitive string comparison...
#include <stdio.h>
#include <string.h>
int main()
{
char word[]="name";
char word0[]="----";
char guess[]="bnexacdfm";
char lett;
int i;
int c;
int e=0;
int gi = 0;
while(e<12 && gi < strlen(guess))
{
// gotoxy(2,2);
printf("\n%s\n",word0);
lett = guess[gi++];
printf("you guessed: %c\n", lett);
// scanf("%c",&lett);
for(i=0,c=0;i<4;i++)
{
if(lett==word[i]) // really want case insensitive comparison here
{
word0[i]=word[i];
printf("found %c at position %d\n", lett, i);
c++;
}
}
printf("Number correct in this guess: %d\n",c);
if(c==0)
{
e++;
printf("Total number of incorrect guesses: %d\n",e);
}
}
if(strcmp(word, word0)==0) {
printf("well done! you win\n");
}
else {
printf("Sorry - you lose\n");
}
return 0;
// getchar();
}
Output:
----
you guessed: b
Number correct in this guess: 0
Total number of incorrect guesses: 1
----
you guessed: n
found n at position 0
Number correct in this guess: 1
n---
you guessed: e
found e at position 3
Number correct in this guess: 1
n--e
you guessed: x
Number correct in this guess: 0
Total number of incorrect guesses: 2
n--e
you guessed: a
found a at position 1
Number correct in this guess: 1
na-e
you guessed: c
Number correct in this guess: 0
Total number of incorrect guesses: 3
na-e
you guessed: d
Number correct in this guess: 0
Total number of incorrect guesses: 4
na-e
you guessed: f
Number correct in this guess: 0
Total number of incorrect guesses: 5
na-e
you guessed: m
found m at position 2
Number correct in this guess: 1
well done! you win
Link to code sample: http://codepad.org/56dC0stD