I/O230427作业

head.h

#ifndef __HEAD_H__
#define __HEAD_H__
#include<stdio.h>
#include<ctype.h>
#include<math.h>
#include<string.h>
#include<stdlib.h>
typedef char sname[20];
typedef char pwd[10];

void reg();
void login();



#endif

main.c

#include"head.h"
int main(int argc, const char *argv[])
{
	printf("请选择登录（l）/录入（i）\n");
	char check;
	scanf("%c",&check);
	if('l'==check)
		login();
	else if('i'==check)
		reg();
	return 0;
}

student.c

#include"head.h"
/*
 * function:    reg
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void reg()
{
	printf("请输入录入学生的数量\n");
	int stu_num;
	scanf("%d",&stu_num);
	if(stu_num<1)
	{
		printf("录入学生数量需大于0\n");
		return ;
	}
	FILE *fp = fopen("student.txt","a+");
	if(NULL==fp)
		perror("fopen");
	int i;
	pwd s_pwd;
	sname s_name;
	for(i=0;i<stu_num;i++)
	{
		printf("学生%d姓名:\n",i+1);
		scanf("%s",s_name);
		printf("学生%d密码:\n",i+1);
		scanf("%s",s_pwd);
		fprintf(fp,"%s\t%s\n",s_name,s_pwd);
	}
	if(fclose(fp)<0)
		perror("fclose");
}
/*
 * function:    login
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void login()
{
	FILE *fp=fopen("student.txt","r");
	if(NULL==fp)
	{
		perror("fopen");
		return ;
	}
	pwd i_pwd;
	sname i_name;
	printf("学生姓名:\n");
	scanf("%s",i_name);
	printf("学生密码:\n");
	scanf("%s",i_pwd);
	pwd s_pwd;
	sname s_name;
	while(1)
	{
		if(EOF==fscanf(fp,"%s",s_name) || EOF== fscanf(fp,"%s",s_pwd))
		{
			printf("账号错误!\n");
			break;
		}
		if(!strcmp(i_name,s_name))
		{
			if(!strcmp(i_pwd,s_pwd))
			{
				printf("登录成功!\n");
			}else{
				printf("输入密码错误!\n");
			}
			break;
		}
	}	
	if(fclose(fp))
	{
		perror("fclose");
		return ;
	}
}