常用的转义序列

#include <stdio.h>

#define QUIT  3

int get_menu_choice( void )
{
    int selection = 0;

    do{
        printf( "/n1 - Beep" );
        printf( "/n2 - Display");
        printf( "/n3 - Quit");
        printf( "/nEnter:" );

        scanf( "%d", &selection );

     }while ( selection < 1 || selection > 3 );

     return selection;
}

void print_report( void )
{
     printf( "/n/nSequence/tMeaning" );
     printf( "/n//a/t/tbell (alert)" );
     printf( "/n//b/t/tbackspace" );
     printf( "/n.../t/t...");
}

int main( void )
{
    int choice = 0;

    while (choice != QUIT)
    {
       choice = get_menu_choice();

       if (choice == 1)
           printf("/nBeeping the computer/a/a/a" );
       else
       {
           if (choice == 2)
               print_report();
       }
    }
    printf("Bye!/n");

    return 0;
}