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

int main ( void ){

        int go = 1;

        while(go == 1){

        int rnumber;
        int answer;
        
        srand( time( NULL ) );

        rnumber = (1 + rand() % 1000);
        answer = firstguess();

        if(rnumber == answer){
                go = replaygame();

        }
        else{
                while(compare( answer, rnumber) == 1){
                        scanf("%d", &answer);
                        
                }
                go = replaygame();
        }
        }

}
int firstguess ( void ){

        int firstanswer;

        printf("I have a number between 1 and 1000.n");
        printf("Can you guess my number?n");
        printf("Please type your first guess.");
        scanf("%d", &firstanswer);

        return firstanswer;

}
int compare ( int a, int b ){

        if ( a < b ){
                
                printf("Too low. Try again.n");
                return 1;
        }
        if ( a > b ){

                printf("Too high. Try again.n");
                return 1;
        }
        if ( a == b){
                return 0;
        }
}
int replaygame( void ){
        
        char replay;

        printf("Excellent! You guessed the number!n");
        printf("Would you like to play again (y or n)? n");
        fflush(stdin);
        scanf("%c", &replay);        

        if( strcmp(replay, "y") == 0){
                return 1;
        }
        else{
                return 0;
        }
}

이렇게 코드를 짰는데
replay를 int로 정의하고 1일때 if가 작동하게 하면 되는데
문자열 y일때 작동하게 하려니까 계속 저 에러가 나네요ㅠㅠ 도와주세요