재귀함수 scanf 질문

#include <stdio.h>
int mystrlen(char arr[]) {
        int i;
        for (i=0;arr[i];++i);
        return i;
}
int recur(char answer[],char blind[],int chance) {
        int i, correctCount = 0;
        char input;
        if(chance > 0) {
                printf("chances left [%d] // %s //\n", chance, blind);
                printf("Guess one character : ");
                scanf("%c", &input);
                for(i=0;i<mystrlen(answer);++i) {
                        if(answer[i] == input) {
                                blind[i] = answer[i];
                                correctCount++;
                        }
                }
        }
        if(correctCount == 0) chance--;
        if(chance == -1) return 0;
        else recur(answer, blind, chance);
}
int main () {
        int i, chance = 3;
        char answer[] = "answer", blind[100] = "*****************";
        blind[mystrlen(answer)] = 0;
        recur(answer, blind, chance);
}