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POC - user single char input rendering weird results
 

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  1. POC - user single char input rendering weird results
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    <p>New here and I have a very simple question. I am making a simple program in C that requires the user to enter a choice of what to do with a char. After they enter the result, the program goes back to the menu. However it seems to take some sort of ghost input as if the char has some unknown value. I need to set the char back to its default state.</p> <p>Code:</p> <pre><code>/* display menu for user */ void menu() { printf("\n- - - Phone Book Database - - -\n"); printf("\nSelect an action:\n\n"); printf("\tc:\tCreate a database entry.\n"); printf("\ts:\tSearch the database entries.\n"); printf("\td:\tDelete a database entry.\n"); printf("\tq:\tQuit program.\n\n"); printf("Enter choice: "); menu_choice = getchar(); if(menu_choice != 'c' &amp;&amp; menu_choice != 's' &amp;&amp; menu_choice != 'd' &amp;&amp; menu_choice != 'q') { printf("\n\n\tInvalid choice.\n"); menu(); } //fflush(stdin); } </code></pre> <p>Here is an example output:</p> <pre><code>- - - Phone Book Database - - - Select an action: c: Create a database entry. s: Search the database entries. d: Delete a database entry. q: Quit program. Enter choice: c Enter name: test Enter address: test Enter number: 3 - - - Phone Book Database - - - Select an action: c: Create a database entry. s: Search the database entries. d: Delete a database entry. q: Quit program. Enter choice: Invalid choice. - - - Phone Book Database - - - Select an action: c: Create a database entry. s: Search the database entries. d: Delete a database entry. q: Quit program. Enter choice: q </code></pre> <p>Entering c as an input calls the following function</p> <pre><code>/* creates a new record in array */ void create_record() { char name[MAX]; char address[MAX]; int number; rec_num++; /* add 1 to marker for record placement */ printf("\nEnter name: "); scanf("%s", name); printf("\nEnter address: "); scanf("%s", address); printf("\nEnter number: "); scanf("%d", &amp;number); strcpy(record[rec_num].name, name); strcpy(record[rec_num].address, address); record[rec_num].number = number; } </code></pre>
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    1. USJames Manes
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    1. COWhat do you do when 'c' is chosen?
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    2. CO@Xymostech When c is chosen it calls another function to create a database entry. I use an array of structs for each field. That works fine, but when going back to the menu() function it places something as an answer and renders "Invalid choice." as you can see.
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    3. COIt looks to me like the other function isn't taking input correctly, so there is extra input left in the buffer and when you get back to the menu, something is already selected. Can we see the code for the function you talked about?
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