#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAXKEY 1000
typedef struct Info_s {int num;char name[30];int age;char addr[30];
}Info_t, *pInfo_t;
//哈希函数
int hash(char *key)
{int h = 0, g;while (*key){h = (h << 4) + *key++;g = h & 0xf0000000;if (g)h ^= g >> 24;h &= ~g;}return h % MAXKEY; //返回值范围: 0~MAXKEY-1
}
int main() {//建立哈希表pInfo_t hashTable[MAXKEY] = { NULL };Info_t infoArr[] = {1001, "Wuyifan", 30, "Canada",1003, "Liuhuaqiang", 45, "Shijiazhuang",1005, "Zhengshuang", 30, "Shenyang",1007, "Mayun", 50, "Hangzhou"};//准备好的数据插入哈希表for (int i = 0; i < sizeof(infoArr) / sizeof(Info_t); ++i) {int hashValue = hash(infoArr[i].name);hashTable[hashValue] = &infoArr[i];}//查找char name[30];while (scanf("%s", name) != EOF) {if (hashTable[hash(name)] == NULL) {printf("%s is not in array!\n", name);}else {printf("%d %s %d %s\n", hashTable[hash(name)]->num,hashTable[hash(name)]->name,hashTable[hash(name)]->age,hashTable[hash(name)]->addr);}}
}