线性搜索

[c]代码库

#include <stdio.h> 
#include <stdlib.h> 

int compare(int *x, int *y) 
{ 
   return( *x - *y ); 
} 

int main(void) 
{ 
   int array[5] = {35, 87, 46, 99, 12}; 
   size_t nelem = 5; 
   int key; 
   int *result; 

   key = 99; 
   result = lfind(&key, array, &nelem, 
        sizeof(int), (int(*)(const void *,const void *))compare); 
   if (result) 
      printf("Number %d found\n",key); 
   else 
      printf("Number %d not found\n",key); 

   return 0; 
}