How to handle this exception - c++

Question

I am writing this code to allow user to play game "Guess the number". Once the user guesses right number it asks user if he/she wants to play again. This code works for two plays and if user inputs 'y' to play again for third time, the code shows exception. The exception details are:"Unhandled exception at 0xFEFEFEFE in Ex 5.32 Guess the number.exe: 0xC00001A5: An invalid exception handler routine has been detected (parameters: 0x00000003)."
#include "stdafx.h"
#include <math.h>
#include <stdlib.h>
int a = 1;
int main(int g){
int num, guess;
char YesOrNo;
srand(g);
num = 1 + rand() % 1000;
printf("I have a number between 1 and 1000\nCan you gess my number?\n");
do{
scanf_s("%d", &guess);
if (guess == num){
printf("Excellent! You guessed the number!\n");
break;
}
else if (guess < num)
printf("Too low. Try Again.\n");
else
printf("Too High. Try Again.\n");
} while (1);
printf("Would you like to play again(y or n) ? ");
scanf_s("%s", &YesOrNo);
if (YesOrNo == 'Y' || 'y'){
a++;
main(a);
}
else{
return 0;}
}

Answer 1

Have your scanf_s use the correct format specificer:
scanf_s(" %c", &YesOrNo, 1); // expecting a char
instead of:
scanf_s("%s", &YesOrNo); // expecting a string
If you were using the standard scanf() using the wrong format string can lead to undefined behavior… not positive about the same for scanf_s() but it can’t be good.
Also note that scanf_s() requires a size to be passed with character or string input (hence the 1 after the YesOrNo parameter):
Unlike scanf and wscanf, scanf_s and wscanf_s require the buffer size to be specified for all input parameters of type c, C, s, S, or string control sets that are enclosed in []. The buffer size in characters is passed as an additional parameter immediately following the pointer to the buffer or variable.
Also... you tagged this with both C and C++, note that C allows you to call main() from within itself while C++ does not. Although, frankly IMO there's never a good reason to do this, and I don't see a good reason for your program to.