Thread: infintite loop

I have a pice of code

Code:

	do
	{
		clrscr();
		printf("\n\n\t\t <<< MAIN MENU >>>");
		printf("\n\n\t 1. Insert ");
		printf("\n\n\t 2. Delete ");
		printf("\n\n\t 0. Exit ");
		printf("\n\n\t\t Enter your choice  :  ");
		scanf("%d",&ch);
		switch(ch)
		{
			case 1 : printf("\n Enter data to be inserted : ");
				scanf("%d",&data);
				enqueue(&qarr,data);
				printf("\n\nThe queue is :-\n\n");
				display(qarr);
				break;

			case 2 : printf("\n\nBefore Deletion queue is :-\n\n");
				display(qarr);
				dequeue(&qarr);
				printf("\n\nThe new queue is :-\n\n");
				display(qarr);
				break;

			case 0 :exit(0);

			default: printf("\n Invalid Choice, try Again !!!");
		}
		printf("\n\n\n\n\t\t Press any key to continue...");
		getch();
	}
	while(1);

if during runtime i input a character into choice instead of an integer the progam goes into infinite loop.

I know how to rectify the problem. Bt i don't know why the reason due to which the program is going into an infinite loop. Please help

Thanks, but can you please tll me why is the program going into an infinite loop in the first place?

Code:

int c;

while ((c = getchar()) != EOF && c != '\n');

Question 12.1