ex06_17.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

/* ex06_17.c */
/* What does this program do? */
#include <stdio.h>
#define SIZE 10

int whatIsThis( const int b[], int p ); /* function prototype */

/* function main begins program execution */
int main( void )
{
   int x; /* holds return value of function whatIsThis */

   /* initialize array a */
   int a[ SIZE ] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

   x = whatIsThis( a, SIZE );

   printf( "Result is %d\n", x );

   return 0; /* indicates successful termination */

} /* end main */

/* what does this function do? */
int whatIsThis( const int b[], int p )
{
   /* base case */
   if ( p == 1 ) {
      return b[ 0 ];
   } /* end if */
   else { /* recursion step */ 

      return b[ p - 1 ] + whatIsThis( b, p - 1 );
   } /* end else */
   
} /* end function whatIsThis */



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