Menu not working

This is a discussion on Menu not working within the C Programming forums, part of the General Programming Boards category; This is in main, and loops, of course, until the user presses 'e'. For some reason though, it gets printed ...

  1. #1
    Registered User
    Join Date
    Mar 2004
    Posts
    8

    Menu not working

    This is in main, and loops, of course, until the user presses 'e'. For some reason though, it gets printed twice after it determines what button was pressed and goes and does what it's suppose too. Any ideas?

    Code:
    	while(input != 'e'){
    		printf("Please make a selection:\n");
    		printf("a <id number> to enter a customer into queue\n");
    		printf("r to remove a customer from queue\n");
    		printf("c to get a count of customers\n");
    		printf("e to exit program\n");
    		input = getchar();
    		printf("\n");
    		if(input == 'r'){
    			if(remCust() == 0)
    				printf("Error");
    		}
    		else if(input == 'c'){
    			printf("Count: %d\n",countCust());
    			
    		}
    		else if(input == 'a'){
    			scanf("%d", &id);
    			printf("\n");
    			if(addCust(id) == 0)
    				printf("Not added\n");
    		}
    	}

  2. #2
    ATH0 quzah's Avatar
    Join Date
    Oct 2001
    Posts
    14,826
    Code:
    input = getchar();
    while( fgetc( stdin ) != '\n' );
    You and this person should get together and have a "stuff in the input buffer" party.

    In your case, what's happening is you press eenter. So it sends two characers. e and then enter. That's what happens when you mix scanf with other things like getchar.

    Quzah.
    Hope is the first step on the road to disappointment.

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