今天小编给大家分享一下基于C语言如何实现随机点名器的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
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;
}以上就是“基于C语言如何实现随机点名器”这篇文章的所有内容，感谢各位的阅读！相信大家阅读完这篇文章都有很大的收获，小编每天都会为大家更新不同的知识，如果还想学习更多的知识，请关注亿速云行业资讯频道。
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