Compare_Files I2-Version

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
enum status {success, fail};

void remove_Quotation_Marks (char str[], int len){
    int i;
    for(i=0;i<len;i++){
        str[i] = str[i+1];
    }
    str[len] = NULL;
}

void Check_characters_in_path(char str[]){
    int i;
    enum status f;
    do{
        f=success;
        if (str[0]=='"' && str[strlen(str)-1]!='"'){
            printf("*Illegal!*\nReinsert path:  ");
            flushall();
            gets(str);
            f=fail;
            continue;
        }

        for (i=0;str[i]!=NULL;i++){
            if (str[i]<0 || str[i]>126){
                printf("*Only English characters!*\nReinsert path:  ");
                flushall();
                gets(str);
                f=fail;
                break;
            }
        }
    }while(f==fail);
}



void main() {
    enum status sss;
    FILE *fp1,*fp2;
    int q1,q2;
    char str[250], ask;
    printf("Compare 2 files  -I2 Version-     (Only English characters in the path please!)\n\n");

    do{
        sss=success;
        flushall();
        printf("Enter first path:  ");
        gets(str);
        Check_characters_in_path(str);
        if (str[0]=='"') remove_Quotation_Marks (str,strlen(str)-2);
        fp1 = fopen(str , "rb");
        if(fp1 == NULL){
            printf("Can't open file\n");
            goto ABC;
        }

        printf("Enter second path:  ");
        gets(str);
        Check_characters_in_path(str);
        if (str[0]=='"') remove_Quotation_Marks (str,strlen(str)-2);
        fp2 = fopen(str , "rb");
        if(fp2 == NULL){
            printf("Can't open file\n");
            goto ABC;
        }

        ////  עד כאן קלטנו

        do{
            if (feof(fp1)){
                if (!feof(fp2)) sss=fail;
                break;
            }

            if (sss==fail) break;
            fread(&q1, sizeof(int) ,1,fp1);
            fread(&q2, sizeof(int) ,1,fp2);
            if (q1 != q2){
                printf("Different value\n");
                sss=fail;
            }
        }while(1);

        (sss==success)? printf("The files are the same!\n"): printf("The files are NOT the same!\n");
        fclose(fp1);
        fclose(fp2);

ABC:
        printf("\n\nAgain?  (Y/N)\n");
        ask = getchar();
        while(ask != 'y' && ask != 'Y' && ask != 'n' && ask != 'N'){
            printf("Please enter Y/N!\n");
            flushall();
            ask = getchar();
        }
    }while(ask == 'y' || ask == 'Y');
    gets(str);
}