#include <stdio.h>#include <stdlib.h>int main(void){    int a[] = {3,4,3,2,1,2,3,4,3,4,5,6,5};    int i, next, to_search;    int len = sizeof(a);    int count = 0, found = 0;    printf("Please input the number that you want to search: ");    scanf("%d",&to_search);    for( i=0; i<len; i+=next)    {        ++count;        if( a[i] == to_search )        {            found = 1;            break;        }        else            next = abs(a[i]-to_search);    }    printf("Search times: %d\n",count);    if( found )        printf("%d is at a[%d]\n",to_search, i);    else        printf("Not found.\n");    return 0;}