#include<stdio.h>
#include<locale.h>
#include<time.h>
#include<stdlib.h>
#include<string.h>
 
int main ()
{
    int i,len_palavra;
    char lacuna[20]="_";
    char letra;
    char palavra[]="arroz";
 
    setlocale(LC_ALL,"PORTUGUESE");
 
    len_palavra = strlen(palavra);
    for(i=1; i<len_palavra; i++)
        lacuna[i]='_';
 
    while (strcmp(palavra,lacuna) != 0)
    {
        system("cls");
        printf("\t\t%s\n",lacuna);
        printf("\nDigite uma letra: ");
        scanf("%c",&letra);
 
        for(i=0; i<len_palavra; i++)
        {
            if (letra == palavra[i])
                lacuna[i] = letra;
        }
    }
 
    printf("\t\t%s\n",lacuna);
    return 0;
}
 

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