/*
*  
* Demonstrate the use of scanf() to obtain numerical values 
*/
#include <stdio.h>
#define QUIT 4

int get_menu_choice(void);

void main()
{
    int choice      = 0;
    int int_var     = 0;
    float float_var    = 0.0;
    unsigned u_var    = 0;

    while (choice != QUIT)
    {
      choice = get_menu_choice();
      if (choice == 1)
      {
          puts("\nEnter a signed decimal integer (i.e. -123)");
          scanf("%d", &int_var);
      }
      if (choice == 2)
      {
          puts("\nEnter a decimal floating point number (i.e. 1.23)");
          scanf("%f", &float_var);
      }
      if (choice == 3)
      {
          puts("\nEnter an unsigned decimal integer (i.e. 123)");
          scanf("%u", &u_var);
      }
    }

    printf("\nYour values are:\n int: %d float: %.2f unsigned: %u \n",
        int_var, float_var, u_var);
}
int get_menu_choice(void)
{
    int selection = 0;
    do
    {
    puts("\n1 - Get a signed decimal integer");
    puts("2 - Get a decimal floating point number");
    puts("3 - Get an unsigned decimal integer");
    puts("4 - Quit");
    puts("\nEnter a selection:");
    scanf("%d", &selection);

    } while (selection < 1 || selection > 4);

    return selection;
}