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基于C语言实现随机点名器(附源码)

作者：草木之花

这篇文章主要为大家详细介绍如何基于C语言实现一个简单的随机点名器，文中的示例代码讲解详细，感兴趣的小伙伴可以跟随小编一起动手尝试一下

突发奇想写了个随机点名器…以供使用

随机点名器

main函数

#include "myList.h"

#define FILENAME "stu.txt"

void menu();//画面界面;
void userOptions(Node* headNode);//用户选项

int main(void) {
	SetConsoleTitle(L"随机抽查系统");
	Node* List = createrList();
	readInfoFromFile(List, FILENAME);

	while (true) {

		menu();

		userOptions(List);



		system("pause");
		system("cls");

	}

	system("pause");

	return 0;
}




void menu() {
	printf("\t\t\t学生点名系统\n");
	printf("\t\t1)开始随机抽查"
		"\t\t2)添加学生\n"
		"\t\t3)删除学生"
		"\t\t4)修改学生信息\n"
		"\t\tq)退出\n");
	printf("请输入你的选项:");

}

void userOptions(Node* List) {
	Student info;

	char choose = '0';

	choose = enter();

	switch (choose) {

	case '1':
		printf("\t\t\t*开始随机抽查*\n");
		
		seekNode(List, rollCall(LengthNode(List)));
		break;
	case '2':

		printf("\t\t\t\t\t\t已有学生如下\n");
		printfNode(List);
		printf("\t\t\t*添加学生*\n");
		printf("注意请从%d之后开始也就是%d\n", LengthNode(List),LengthNode(List)+1);
		printf("\t\t请输入学生序号:");

		scanf_s("%d",&info.num);
		
		printf("\t\t请输入学生学号:");
		scanf_s("%ld", &info.number);
		printf("\t\t请输入学生姓名:");
		scanf_s("%s", info.name, sizeof(info.name));
		insetNodeByHead(List, info);

		break;
	case '3':
		printf("\t\t\t\t\t\t已有学生如下\n");
		printfNode(List);
		printf("\t\t\t*删除学生*\n");
		printf("\t\t请输入学生学号(后两位即可):");
		scanf_s("%ld", &info.number);
		deleteNodeAppoinNumber(List, info.number);
		break;
	case'4':
		printf("已有学生如下\n");
		printfNode(List);
		printf("\t\t\t*修改学生信息*\n");
		printf("\t\t请输入学生学号:");
		scanf_s("%ld", &info.number);
		upDataNode(List, info.number);

		break;
	case'q':
		printf("\t\tquit!\n");
		exit(0);
		break;
	default:
		break;




	}
	weiteInfoToFile(List, FILENAME);


}

enter.h

(这个就是我自己写来玩的,读取输入的字符,你们也可以自己弄一个,就可以不用我这个了。但是要记得修改一下引用这个的代码喔)

#pragma once  //防止重复引用
#include "myList.h" 



//处理写入
char enter(void); //函数声明


char enter(void) {
	short count = 1;//次数

	char input = getchar(); // 读取单个字符
	fflush(stdin);//清空输入缓存区,防止读取后,又读取

	for (int i = 1; i <= 12; i++) {//如果超过误输入超过13次,强制退出程序

		if (input == '\n') {//如果读取的一直是回车,就会执行,否则返回该值
			count++;

			scanf_s("%c", &input, 3);

			fflush(stdin);

			if (count == 5) {
				printf("\n\t\t\t\t\t\t别再调皮了!\n");
				continue;
			}
			else if (count == 11) {
				printf("\n\t\t\t\t\t\t别在摁回车键了!最后一次机会了\n");
				continue;

			}
			else if (count == 13) {

				printf("\n\t\t\t\t\t\t程序已强制退出!byebye");
				exit(0);
			}

		}
		else { return  input; }

	}
	return 0;
}

myList.h

#pragma once
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>
#include <windows.h>
#include "enter.h"
typedef struct student {//类型
	long int number;
	char name[10];

	int  num;//给定一个序号然后添加一个学生后就自加1;

}Student;

typedef struct Node {
	Student data;
	struct Node* next;

}Node;





//创建链表
Node* createrList(void) {

	Node* headNode = (Node*)malloc(sizeof(Node));

	if (headNode) {
		headNode->next = NULL;
	}

	return headNode;
}


//创建结点
Node* createrNode(Student data) {

	Node* newNode = (Node*)malloc(sizeof(Node));

	if (newNode) {
		newNode->data = data;
		newNode->next = NULL;
	}

	return newNode;
}

//插入结点
void insetNodeByHead(Node* headNode, Student data) {

	Node* newNode = createrNode(data);

	newNode->next = headNode->next;
	headNode->next = newNode;

}

//删除结点
void deleteNodeAppoinNumber(Node* headNode, long int number) {
	Node* posNode = headNode->next;
	Node* posFrontNode = headNode;

	if (posNode == NULL) {
		printf("\t\t表中没有学生\n");
	}
	else {

		while (posNode->data.number != number) {//没有找到就继续找
			posFrontNode = posNode;
			posNode = posNode->next;

			if (posNode == NULL) {//找完最后一个了还没有
				printf("\t\t表中没有该学生\n");
				return;
			}
		}

		//找到了,执行删除操作
		posFrontNode->next = posNode->next;
		free(posNode);
		printf("\t\t删除完成!");
	}


}

//修改结点
void upDataNode(Node* headNode, long int number) {
	Node* posNode = headNode->next;
	Node* posFrontNode = headNode;

	char choose = '0';

	if (posNode == NULL) {
		printf("\t\t该表中没有学生\t");
	}
	else {
		while (posNode->data.number != number) {
			posFrontNode = posNode;
			posNode = posNode->next;

			if (posNode == NULL) {
				printf("\t\t表中没有该学生\n");
				return;

			}
		}

		while (true) {
			printf("\t\t请选择要修改的选项:1)姓名  2)学号  q)退出!\n");
			printf("\t\t请输入:");
			choose = enter();


			switch (choose) {
			case '1':
				printf("\t\t请输入你要更改的名字(原姓名是%s):", posNode->data.name);
				scanf_s("%s", posNode->data.name, sizeof(posNode->data.name));
				system("pause");
				break;
			case '2':
				printf("\t\t请输入你要更改的学号(原学号是%ld):", posNode->data.number);
				scanf_s("%ld", &posNode->data.number);
				system("pause");
				break;
			case 'q':
				printf("\t\tquit!");
				return;
			default:
				printf("请输入正确选项:");
				break;
			}
		}

	}




}
//打印结点
void printfNode(Node* headNode) {
	Node* pMove = headNode->next;


	printf("\t\t\t\t\t\t\t\t学号\t\t姓名\n");
	while (pMove != NULL) {
		printf("\t\t\t\t\t\t\t\t%ld\t%s\n", pMove->data.number, pMove->data.name);
		pMove = pMove->next;
	}
	printf("\n");
}


//文件读
bool readInfoFromFile(Node* headNode, char* fileName) {

	Student data;
	boolean  one = false;
	FILE* fp;
	fopen_s(&fp, fileName, "r");

	if (fp == NULL) {
		fopen_s(&fp, fileName, "w+");

	}

	if (fp == NULL) { return EOF; }

		while (fscanf_s(fp, "%d\t%ld\t%s"
		, &data.num,&data.number, data.name, sizeof(data.name)) != EOF) {

				insetNodeByHead(headNode, data);
	
	}

	if (fp == NULL) { return EOF; }
	fclose(fp);

	return 0;
}

//文件写
bool  weiteInfoToFile(Node* headNode, char* fileName) {
	
		

	FILE* fp;
	fopen_s(&fp, fileName, "w");
	Node* pMove = headNode->next;
	if (fp == NULL) { return EOF; }
	while (pMove) {
		
		
		fprintf_s(fp, "%d\t\t%ld\t\t%s\n", pMove->data.num,pMove->data.number,pMove->data.name);
	
		pMove = pMove->next;
	}

	if (fp == NULL) { return EOF; }
	fclose(fp);
	return 0;
}



//求出链表长度然后返回
int LengthNode(struct Node* headNode) {
	int length = 0;

	struct Node* pMove = headNode->next;

	while (pMove) {
		length++;
		pMove = pMove->next;

	}

	return length;
}



//读取随机数然后选出该学生
void seekNode(Node* headNode, long int rand_1) {
	Node* posNode = headNode->next;
	Node* posFrontNode = headNode;

	if (posNode == NULL) {
		printf("\t\t该表中没有学生\t");
	}
	else
	{	//这里的number改为num
		while (posNode->data.num != rand_1) {
			posFrontNode = posNode;
			posNode = posNode->next;
			if (posNode == NULL) {
				printf("\t\t该表中没有这这个学号(%ld)的学生\n", rand_1);
				return;
			}
		}


			printf("就决定是你了->");
			printf("\t\t%ld\t%s\n\n\n\n\n", posNode->data.number, posNode->data.name);
		
	}


}


//产生随机数
long int rollCall(long int length) {
	long int number;
	srand((unsigned)time(NULL));
	number = rand() % length + 1;//33+40;//length+1
	return number;
}

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