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- /* Demonstration on using scan() */
-
- #include <stdio.h>
-
- #define QUIT 4
-
- int get_menu_choice( void );
-
- main()
- {
- int choice = 0;
- int int_var = 0;
- float float_var = 0.0;
- unsigned unsigned_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", &unsigned_var );
- }
- }
- printf( "\nYour values are: int: %d float: %f unsigned: %u ",
- int_var, float_var, unsigned_var );
- }
-
- int get_menu_choice( void )
- {
- int selection = 0;
-
- do
- {
- puts( "\n1 - Get an 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;
- }
-