C Wierd errors

/*
Project: Concentration
Description: The concentration game generates random numbers and displays them for short period of time for the user to memorize.
During the time the random numbers are displayed, the player tries to memorize the number and their sequence.
After a few seconds have passed, the computer screen is cleared and the user is asked to input the same numbers in the same sequence.
*/
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
   // Declarations
   char cYesNo = 'z';
   int guessNum1 = 0;
   int guessNum2 = 0, guessNum3 = 0;
   int randNuml = 0, randNum2 = 0, randNum3 = 0;
   int elapsedTime = 0;
   int currentTime = 0;
   int counter = 0;
   srand(time(NULL));
   // Input, Process, Output
   printf("Play a game of Concentration? (y or n): ");
   scanf("%c", &cYesNo);

   if(cYesNo == 'y' cYesNo == 'Y')
   {

      randNuml = rand() % 100;
      randNum2 = rand() % 100;
      randNum3 = rand() % 100;
      printf("\nConcentrate on the next three numbers\n");
      printf("\n\t%d %d %d\n\n", randNuml , randNum2, randNum3);

      currentTime = time(NULL);

      do{
         elapsedTime = time(NULL);
      }while ((elapsedTime - currentTime) < 3);

      system("cls");

      printf("\nEnter each # separated with one space: ");
      scanf("%d%d%d", &guessNum1, &guessNum2, &guessNum3);

      if(randNuml == guessNum1 && randNum2 == guessNum2 && randNum3 == guessNum3)
         printf("\nCongratulations!\n");
      else
         printf("\nSorry, correct numbers were: %d %d %d\n", randNuml, randNum2, randNum3);
   }
   printf("\nPress any key to quit");
   getch();
   return 0;
}