#include <stdio.h>
#include <stdlib.h>
int checkAns(char c)
{
    switch (c){
        case 'y':
            return 1;
            break;
        case 'n':
            return 0;
            break;
        default:
            printf("INVALID OUTPUT\n");
            exit(404);
    }
}

int main()
{
    char ans;
    printf("Do you have a fever? ");scanf(" %c", &ans); //Q1
    if (checkAns(ans)){
        printf("Do you have a sore throat and headache-without nasal drainage? ");scanf(" %c", &ans); //Q2
        if (checkAns(ans)){
            printf("STREP THROAT\n");
        }else{
            printf("Did your symptoms start suddenly, and do you have a combination of symptoms including muscle aches, chills, a sore throat, runny nose or cough? ");scanf(" %c", &ans); //Q3
            if (checkAns(ans)){
                printf("FLU\n");
            }else{
                printf("Do you have a runny and/or itchy nose, sneezing, and itchy eyes? ");scanf(" %c", &ans); //Q4
                if (checkAns(ans)){
                    printf("ALLERGIES\n");
                }else{
                     printf("Do you have sneezing, a sore throat, headache, congestion and a runny nose? ");scanf(" %c", &ans); //Q5
                     if (checkAns(ans)){
                         printf("COLD\n");
                     }else{
                         printf("Call Your Doctor\n");
                     }
                }
            }
        }

    }else{
        printf("Do you have a runny and/or itchy nose, sneezing, and itchy eyes? ");scanf(" %c", &ans); //Q4
        if (checkAns(ans)){
            printf("ALLERGIES\n");
        }else{
             printf("Do you have sneezing, a sore throat, headache, congestion and a runny nose? ");scanf(" %c", &ans); //Q5
             if (checkAns(ans)){
                 printf("COLD\n");
             }else{
                 printf("Call Your Doctor\n");
             }
        }
    }
}