C语言 猜字游戏

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

main()
{
    char c;
    clock_t start, end;
    time_t a, b;
    double var;
    int i, guess;
    int YY;
    srand(time(NULL));
    printf("do you want to play it.('y' or 'n') \n");
loop:
    while((c=getchar()) == 'y')
    {
        i = rand()%100;
        YY = 1;
        printf("\nPlease input number you guess:\n");
        start = clock();
        a = time(NULL);
        scanf("%d", &guess);
 
        while(guess!=i)
        {
            printf("%d %c\n", guess, guess);

            if(guess>i)
            {
                printf("please input a little smaller.\n");
                if(!scanf("%d", &guess)){YY = 0;break;};

            }
            
            else
            {
                
                printf("please input a little bigger.\n");
                if(!scanf("%d", &guess)){YY = 0;break;};
            }
        }
        end = clock();
        b = time(NULL);
        printf("\1: It took you %6.3f seconds\n", var=(double)(end-start)/1000);
        printf("\1: It took you %6.3f seconds\n\n", difftime(b, a));
        if(YY == 0)
        {
            printf("input data type error!");

        }
        else if(var < 15 && YY == 1)

        {
            printf("\1\1 You are vary clever! \1\1\n\n");
            
        }
        else if(var < 25 && YY == 1)
        {
            printf("\1\1 you are normal! \1\1\n\n");

        }
        else
        {
            printf("\1\1 you are stupid!\1\1\n\n");
        
        }
        if(YY == 1)
        {
            printf("The number you guess is %d", i);
        }
        
    }
    printf("\nDo you want to try t again?(\"y\".or.\"n\")\n");
    if((c=getch()) == 'y')
        goto loop;
}

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