this is my code, I dont know why it will not run perfectly?
Code:
```int easy(int z)//EASY ROUND PROBLEM
{
int elapTicks;

double elapMilli, elapSeconds, elapMinutes;

clock_t Begin, End;             //initialize Begin and End for the timer

int cells (int z){
char sudoku_prob[Z][Y][X]={
{
{'2','5','A','6','3','B','7','9','8'},
{'3','4','6','2','C','1','8','7','9'},
{'1','D','5','4','6','9','E','8','7'},
{'4','7','F','5','1','8','6','3','2'},
{'G','9','7','3','H','6','1','2','4'},
{'6','3','I','8','9','7','5','4','J'},
{'K','8','3','7','4','L','2','1','M'},
{'8','N','4','1','7','2','9','5','3'},
{'7','1','8','O','2','3','4','P','5'},
},
};
Begin = clock() * CLK_TCK;    //begin the timer
// for(int a=1; a<=10000; a++);
sleep(1000);
//initialization of a 3D array where array[Z][Y][X] in a 3D Cartesian plane
int i=1,x, y,check=0;
for (y=0; y<Y; y++){
for (x=0; x<X; x++)
printf("%4c", sudoku_prob[z][y][x]);
printf("\n\n");
}

printf("\n\n");

switch(z)
{
case 0:    printf("\nEnter for A: ");sudoku_prob[z][0][2]=getchar();getchar();
printf("Enter for B: ");sudoku_prob[z][0][5]=getchar();getchar();
printf("Enter for C: ");sudoku_prob[z][1][4]=getchar();getchar();
printf("Enter for D: ");sudoku_prob[z][2][1]=getchar();getchar();
printf("Enter for E: ");sudoku_prob[z][2][6]=getchar();getchar();
printf("Enter for F: ");sudoku_prob[z][3][2]=getchar();getchar();
printf("Enter for G: ");sudoku_prob[z][4][0]=getchar();getchar();
printf("Enter for H: ");sudoku_prob[z][4][4]=getchar();getchar();
printf("Enter for I: ");sudoku_prob[z][5][2]=getchar();getchar();
printf("Enter for J: ");sudoku_prob[z][5][8]=getchar();getchar();
printf("Enter for K: ");sudoku_prob[z][0][0]=getchar();getchar();
printf("Enter for L: ");sudoku_prob[z][6][5]=getchar();getchar();
printf("Enter for M: ");sudoku_prob[z][6][8]=getchar();getchar();
printf("Enter for O: ");sudoku_prob[z][8][3]=getchar();getchar();
printf("Enter for P: ");sudoku_prob[z][8][7]=getchar();getchar();
break;

default: break;
}
for (y=0; y<Y; y++){
for (x=0; x<X; x++){
if (sudoku_ans[z][y][x]==sudoku_prob[z][y][x])
check++;
}
}
if (check==81)
printf("\n\nAnswer Correct: Press any key to continue\n\n");
else
{
printf("\n\nAnswer Incorrect: Press any key to continue\n\n");
check=0;
}
End = clock() * CLK_TCK;        //stop the timer
return check;
}

elapTicks = End - Begin;        //the number of ticks from Begin to End

elapMilli = elapTicks/1000;     //milliseconds from Begin to End

elapSeconds = elapMilli/1000;   //seconds from Begin to End

elapMinutes = elapSeconds/60;   //minutes from Begin to End

if(elapSeconds < 1)

printf("\n\nIt took %d milliseconds.", elapMilli);

else if(elapSeconds == 1)

printf("\n\nIt took  1 second.");

else if(elapSeconds > 1 && elapSeconds < 60)

printf("\n\nIt took %d seconds.", elapSeconds);

else if(elapSeconds >= 60)

printf("\n\nIt took  %d minutes.", elapMinutes);

return 0;

}```