C库函数 bsearch()

#include <stdio.h>

#include <stdlib.h>



int cmpfunc(const void * a, const void * b) {

   return ( *(int*)a - *(int*)b );

}



int values[] = { 5, 20, 29, 32, 63 };



int main () {

   int *item;

   int key = 32;



   /* using bsearch() to find value 32 in the array */

   item = (int*) bsearch (&key, values, 5, sizeof (int), cmpfunc);

   if( item != NULL ) {

      printf("Found item = %d\n", *item);

   } else {

      printf("Item = %d could not be found\n", *item);

   }



   return(0);

}