博客

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
#define NUM 5
typedef struct hash {
	int num;//哈希表多少个值
	char* data;//data的指针
}hash;
hash* init() {
	hash* L = (hash*)malloc(sizeof(hash));
	L->num = 0;
	//指针型的若要用内部东西就要开辟空间
	L->data = (char*)malloc(sizeof(char) * NUM);
	for (int i = 0; i < NUM; i++) {
		L->data[i] = 0;
	}
	return L;
}
int achash(int data) {
	return data % NUM;
}
void inhash(hash* L, char data) {
	int index = achash(data);
	if (L->data[index] != 0) {//<>0说明被空间占住了
		int xianxing = 1;//线性探测法
		while (L->data[index] != 0){
			index = achash(achash(data) + xianxing);
			xianxing++;
		}//遍历直到不冲突为止
		L->data[index] = data;
	}
	else//不冲突直接将元素放入这个地方
		L->data[index]=data;
}
int ss(hash* L, char data) {
	int index = achash(data);
	while (L->data[index] != data) {
		int xianxing = 1;
		while (L->data[index] != data) {
			index = achash(achash(data) + xianxing);
			if (xianxing == NUM)
				return -1;
			xianxing++;
		}
	}
	return index;
}
int main() {
	hash* H = init();
	char a;
	inhash(H, 'A');
	inhash(H, 'F');
	inhash(H, 'H');
	inhash(H, 'D');
	inhash(H, 'C');
	for (int i = 0; i < NUM; i++)
		printf("H->data[%d]=%c\n", i, H->data[i]);
	//查找多次
	while (1) {
		printf("输入查找的元素（大写英语字母）：\n");
		a = _getche();//不回车直接出结果
		ss(H, a) != -1 ? printf("\n此字母存在\n") : printf("\n此字母不存在\n");
	}
	//查找一次
	/*
	printf("输入查找的元素（大写英语字母）：\n");
	scanf_s("%d", &a);
	ss(H, a) != -1 ? printf("\n此字母存在\n") : printf("\n此字母不存在\n");
	*/
	return 0;
}