Floating point exception (core dumped)고수님들 도와주시면 감사하겠습니다.

  1 #include <stdio.h>
  2 #include <stdlib.h>
  3 #include <unistd.h>
  4 #include <time.h>
  5 #include <termios.h>
  6
  7 int getch(void)
  8 {
  9         int ch;
 10         struct termios buf, save;
 11         tcgetattr(0, &save);
 12         buf = save;
 13         buf.c_lflag &= ~(ICANON | ECHO);
 14         buf.c_cc[VMIN] = 1;
 15         buf.c_cc[VTIME] = 0;
 16         tcsetattr(0, TCSAFLUSH, &buf);
 17         ch = getchar();
 18         tcsetattr(0, TCSAFLUSH, &save);
 19         return ch;
 20 }
 21
 22 int main(void)
 23 {
 24     srand(time(NULL));
 25
 26     unsigned S;
 27
 28     int Exit=1;
 29     char input[100]={0}, Input;
 30     int record[5], again, letters, n, x, total=0, acc=0;
 31     int progress=0, best_type, current_type, comparing_type, accurateness;
 32     char d='%', origin;
 33     clock_t start_clock, end_clock, diff_clock, ex_time;
 34
 35     char sentence[30][100]=
 36     {
 37     "To be or not to be that is a question.\n",
 38     "I believe I can fly.\n",
 39     "Cause, We will, We will rock you.\n",
 40     "Fly me to the moon, and let me play among the stars.\n",
 41     "God, Forgive us.\n",
 42     "I was born to love you.\n",
 43     "Can you feel the love tonight?\n",
 44     "I hear Jerusalem bells a ringing.\n",
 45     "Let's get out tonight.\n",
 46     "When you're gone, The pieces of my heart are missing you.\n",
 47     "Forgive me girl. Lady won't you save me. My heart belongs to you.\n",
 48     "Maybe I'm defective or maybe I'm dumb.\n",
 49     "If this is love, then love is easy.\n",
 50     "I'm at a payphone trying to call home, all of my change I spent on you\n",
 51     "Sugar! Yes, please. Won't you come and put it down on me.\n",
 52     "Honesty, It such a lonely word.\n",
 53     "But I wonder where were you. When I was at my worst, Down on my knees.\n",
 54     "All the moves like Jagger. I've got the moves like Jagger.\n",
 55     "So I cross my heart and I hope to die.\n",
 56     "Got me so high and then she dropped me. But she got me\n",
 57     "All I want for Christmas is you.\n",
 58     "Won't you marry me if I could be a rich boy?\n",
 59     "Billie Jean is not my lover, She's just a girl who claim that I am the one\n",
 60     "Oh baby give me one more chance show that I love you.\n",
 61     "ABC easy as 123. Or simple as Do re mi, ABC, 123, baby, you and me girl.\n",
 62     "Take this sinking boat and point it home, We've still got time.\n",
 63     "Let it go, Let it go. Can't hold it back anymore.\n",
 64     "Never mind, I'll find someone like you.\n",
 65     "We could have had it all. Rolling in the deep.\n",
 66     "Listen, I am alone at a crossroads. I'm not at home in my own home.\n"
 67     };
 68
 69
 70     start_clock=clock();
 71
 72     while(Exit){
 73     for(again=0; again<=5; again++)//Body of Mode.
 74     {
 75
 76         S=rand() % 30;//Save the value randomly, from 0 to 29.
 77
 78             for(n=0;n<100;n++)
 79             {
 80
 81                 if(again==0)//when the typingspeed are not defined.
 82                 {
 83                     best_type=0;
 84                     current_type=0;
 85                 }
 86                 else//when the typingspeed are defined, then comparing the speed.
 87                 {
 88                     comparing_type=best_type;
 89                     if(comparing_type>=current_type)
 90                         best_type=comparing_type;
 91                     else
 92                         best_type=current_type;
 93                 }
 94
 95                 if(acc==0)//shut down the probability of overflow.
 96                     accurateness=0;
 97                 else
 98                     accurateness=acc/total;//find the accurateness
 99
100                   if(again==0)//when the typingspeed are not defined.
101                   {
102                       best_type=0;
103                       current_type=0;
104                   }
105
106                 system("clear");
107                 printf(">> 영문 타자 연습 프로그램 : 짧은 글 연습<<\n");
108                 printf("진행도 : %d%c   현재타수 : %d   최고타수 : %d   정확도 : %d%c\n", progress*20, d, current_type, best_type, accurateness, d);
109                 for(x=0; x<100; x++)
110                 {
111                     printf("%c", sentence[S][x]); //print letters.
112                 }
113                 for(int y=0; y<100; y++)//print inputed letters by user.
114                 {
115                     printf("%c", input[y]);
116                 }
117
118                 Input=getch();
119
120                 end_clock=clock();
121                 diff_clock = end_clock - start_clock;
122                 ex_time = diff_clock / CLOCKS_PER_SEC;
123                 current_type = acc / ex_time;
124
125                 input[n]=Input;
126
127                 if(Input=='\x7f')//when user presses backspace.
128                 {
129                     if(input[n-1]==sentence[S][n-1])
130                     {
131                         acc--;
132                         total--;
133                     }
134                     else
135                         total--;
136
137                     input[n-1]=0;
138                     n--;
139                     n--;
140                     continue;
141                 }
142
143                 if(Input=='\n')//when user presses enter, before the complete practice.
144                     break;
145             }
146
147
148         progress++;
149     }
150
151     printf("짦은 글 연습이 끝났습니다. Enter를 눌러 메뉴로 나가십시오.");
152     Input=getch();
153
154     if(Input=='\n')
155         Exit=0;
156
157     sleep(1);
158     }
159     return 0;
160     }