fig05_08.c

C程序设计经典教程第5版程序示例,比较适合初级c语言的学生

/* Fig. 5.8: fig05_08.c
   Roll a six-sided die 6000 times */
#include <stdio.h>
#include <stdlib.h>

/* function main begins program execution */
int main( void )
{
   int frequency1 = 0; /* rolled 1 counter */
   int frequency2 = 0; /* rolled 2 counter */
   int frequency3 = 0; /* rolled 3 counter */
   int frequency4 = 0; /* rolled 4 counter */
   int frequency5 = 0; /* rolled 5 counter */
   int frequency6 = 0; /* rolled 6 counter */

   int roll; /* roll counter, value 1 to 6000 */
   int face; /* represents one roll of the die, value 1 to 6 */

   /* loop 6000 times and summarize results */
   for ( roll = 1; roll <= 6000; roll++ ) {
      face = 1 + rand() % 6; /* random number from 1 to 6 */

      /* determine face value and increment appropriate counter */
      switch ( face ) {

         case 1: /* rolled 1 */
            ++frequency1;
            break;

         case 2: /* rolled 2 */
            ++frequency2;
            break;
       
         case 3: /* rolled 3 */
            ++frequency3;
            break;
         
         case 4: /* rolled 4 */
            ++frequency4;
            break;
         
         case 5: /* rolled 5 */
            ++frequency5;
            break;
         
         case 6: /* rolled 6 */
            ++frequency6;
            break; /* optional */
      } /* end switch */

   } /* end for */
   
   /* display results in tabular format */
   printf( "%s%13s\n", "Face", "Frequency" );
   printf( "   1%13d\n", frequency1 );
   printf( "   2%13d\n", frequency2 );
   printf( "   3%13d\n", frequency3 );
   printf( "   4%13d\n", frequency4 );
   printf( "   5%13d\n", frequency5 );
   printf( "   6%13d\n", frequency6 );
   
   return 0; /* indicates successful termination */

} /* end main */



/**************************************************************************
 * (C) Copyright 1992-2007 by Deitel & Associates, Inc. and               *
 * Pearson Education, Inc. All Rights Reserved.                           *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 *************************************************************************/