这里有很多啊，什么源代码都有
http://www.newasp.net/code/dl003185
这里下C的源代码
去官网吧http://www.cplusplus.com/
这里有C/C++标准库下载
http://www.boost.org/
这里是C++标准库扩展
另外标准库有很多版本
SGI STL是目前应用最为广泛的STL版本了
Boost库是一个经过千锤百炼、可移植、提供源代码的C++库，作为标准库的后备，是C++标准化进程的发动机之一。
具体地址如下
SGI STL
http://www.sgi.com/tech/stl/download.html
或直接下压缩包：http://www.sgi.com/tech/stl/stl.tar
boost
http://sourceforge.net/projects/boost/files/boost/1.40.0/
#include<stdio.h>#include<string.h>
#include<conio.h>
#include<stdlib.h>
#include<ctype.h>
#define STACK_INIT_SIZE 10
#define OK 1
#define TRUE 1
#define FALSE 0
#define ERROR 0
struct student /*定义学生类型，用于存放借出的书籍*/
{
int carnum
char lendbook[10]
}student[1000]
struct employ /*定义职工类型*/
{
int employnum
char employname[15]
int employage
char employsex[2]
char employleve[10]
long int employtage
}employ[50]
struct book /*定义书的类型*/
{
int booknum
char bookname[10]
char bookcreat[10]
int turefalse/*用于借书和还书模块判断一本书是否借出的条件*/
}book[1000]
struct car /*借书卡的数据类型*/
{
int carnum
char studentname[10]
int studentclass
}car[100]
huanbook() /*还书函数*/
{
FILE *fp,*fp2/*定义两个文件指针，fp2用于修改数据时设立临时文件用，防止数据遭破坏*/
int i,n
int carnum
char lendbook[10]
printf("请你输入你的卡号\n")
scanf("%d",&carnum)
fp=fopen("car.txt","r")/*读取卡号记录*/
for(i=0fread(&car[i],sizeof(struct car),1,fp)!=0i++) /*for循环判断卡号是否存在*/
{
if(car[i].carnum==carnum) /*卡号存在，进入下一循环*/
{
n=i
fclose(fp)
printf("请输入你要还的书的名字\n")
scanf("%s",lendbook)
fp=fopen("record.txt","r")
for(i=0fread(&student[i],sizeof(struct student),1,fp)!=0i++) /*判断是否借阅了输入的书*/
{
if(strcmp(student[i].lendbook,lendbook)==0) /*借阅了该书，进入下一循环，否则出错显示*/
{
fclose(fp)
fp=fopen("record.txt","r")
fp2=fopen("bookl.txt","w")
for(i=0fread(&student[i],sizeof(struct student),1,fp)!=0i++)
{
if(strcmp(student[i].lendbook,lendbook)==0)
{
continue/*删除还掉的书的借书记录*/
}
fwrite(&student[i],sizeof(struct student),1,fp2)/*写入原来没还的书的记录*/
}
fclose(fp)
fclose(fp2)
fp=fopen("record.txt","w")
fp2=fopen("bookl.txt","r")
for(i=0fread(&student[i],sizeof(struct student),1,fp2)!=0i++)
{
fwrite(&student[i],sizeof(struct student),1,fp)/*将借书记录信息写回*/
}
fclose(fp)
fclose(fp2)
fopen("bookl.txt","w")/*清临时文件的记录*/
fclose(fp2)
fp=fopen("book.txt","r")
fp2=fopen("bookl.txt","w")
for(i=0fread(&book[i],sizeof(struct book),1,fp)!=0i++) /*将书的记录写入临时文件，防止因为修改信息破坏以前的记录*/
{
if(i==n)
{
book[i].turefalse=1
fwrite(&book[i],sizeof(struct book),1,fp2)/*将还的书的原来状态设为无人借阅的*/
continue
}
fwrite(&book[i],sizeof(struct book),1,fp2)
}
fclose(fp)
fclose(fp2)
fp=fopen("book.txt","w")
fp2=fopen("bookl.txt","r")
for(i=0fread(&book[i],sizeof(struct book),1,fp2)!=0i++)
{
fwrite(&book[i],sizeof(struct book),1,fp)/*将临时文件写回*/
}
fclose(fp)
fclose(fp2)
fopen("bookl.txt","w")/*清临时文件*/
fclose(fp2)
printf("还书完毕，按任意键返回\n")
getch()
return 1
}
}
printf("你没有借这样的书，任意键返回\n")/*出错提示*/
fclose(fp)
getch()
return 0
}
}
printf("系统没这样的卡，和管理员联系,按任意键返回\n")/*出错提示*/
fclose(fp)
getch()
}
findbook()
{
FILE *fp
char bookname[10]
int ture,i
fp=fopen("book.txt","r")
printf("请输入你要查找的书名\n")
scanf("%s",bookname)
for(i=0fread(&book[i],sizeof(struct book),1,fp)!=0i++)
{
if(strcmp(bookname,book[i].bookname)==0)
{
if(book[i].turefalse==1)
{
printf("这本书的详细资料是：%d %s %s 此书现在无人借阅\n按任意键返回\n",book[i].booknum,book[i].bookname,book[i].bookcreat)
}
else {printf("这本书已经有人借出\n")fclose(fp)return 0}
fclose(fp)
return FALSE
}
}
printf("没有你要查询的书籍\n")
fclose(fp)
return FALSE
}
findbook1()
{
FILE *fp
char bookcreat[10]
int ture,i
fp=fopen("book.txt","r")
printf("请输入你要查找的作者名\n")
scanf("%s",bookcreat)
for(i=0fread(&book[i],sizeof(struct book),1,fp)!=0i++)
{
if(strcmp(bookcreat,book[i].bookcreat)==0)
{
if(book[i].turefalse==1)
{
printf("这本书的详细资料是：%d %s %s 此书现在无人借阅\n按任意键返回\n",book[i].booknum,book[i].bookname,book[i].bookcreat)
}
else {printf("这本书已经有人借出\n")fclose(fp)return 0}
fclose(fp)
return FALSE
}
}
printf("没有你要查询的书籍\n")
fclose(fp)
return FALSE
}
lendcount()
{
FILE *fp
int i,n=0
fp=fopen("record.txt","r")
for(i=0fread(&student[i],sizeof(struct student),1,fp)!=0i++)
{
printf("卡号：%d 借出的书籍：%s \n",student[i].carnum,student[i].lendbook)
n=n+1
}
fclose(fp)
printf("目前共有%d本书借出\n",n)
printf("按任意键\n")
getch()
return n
}
chabook()
{
char ch5
do
{
printf("---------------欢迎进入图书查询系统！--------------\n")
printf(" 1：<按书名查找>\n")
printf(" 2：<按作者查找>\n")
printf(" 0：<返回>\n")
printf("请输入0--2,其他输入非法！\n")
scanf("%s",&ch5)
switch(ch5)
{
case '1':findbook()getch()break
case '2':findbook1()getch()break
case '0':break
default:printf("无此 *** 作\n")getch()break
}
}while(ch5!='0')
return FALSE
}
lendbook()
{
FILE *fp,*fp2
int i,n
int carnum
printf("请你输入你的卡号\n")
scanf("%d",&carnum)
fp=fopen("car.txt","r")
for(i=0fread(&car[i],sizeof(struct car),1,fp)!=0i++)
{
if(car[i].carnum==carnum)
{
n=i
fclose(fp)
printf("请输入你要借阅的书的名字\n")
scanf("%s",student[n].lendbook)
fp=fopen("book.txt","r")
for(i=0fread(&book[i],sizeof(struct book),1,fp)!=0i++)
{
if(strcmp(book[i].bookname,student[n].lendbook)==0)
{
if(book[i].turefalse==0) {printf("对不起，此书有人借出，请借其他书\n")fclose(fp)getch()return}
else
fclose(fp)
fp=fopen("record.txt","a+")
student[n].carnum=carnum
fwrite(&student[n],sizeof(struct student),1,fp)
fclose(fp)
fp=fopen("book.txt","r")
fp2=fopen("bookl.txt","w")
for(i=0fread(&book[i],sizeof(struct book),1,fp)!=0i++)
{
if(strcmp(book[i].bookname,student[n].lendbook)==0)
{
book[i].turefalse=0
fwrite(&book[i],sizeof(struct book),1,fp2)
continue
}
fwrite(&book[i],sizeof(struct book),1,fp2)
}
fclose(fp)
fclose(fp2)
fp=fopen("book.txt","w")
fp2=fopen("bookl.txt","r")
for(i=0fread(&book[i],sizeof(struct book),1,fp2)!=0i++)
{
fwrite(&book[i],sizeof(struct book),1,fp)
}
fclose(fp)
fclose(fp2)
fopen("bookl.txt","w")
fclose(fp2)
printf("借书完毕，按任意键返回\n")
getch()
return
}
}
printf("不存在这样的书，任意键返回\n")
fclose(fp)
getch()
return
}
}
printf("你的卡号不存在，请申请新卡,按任意键返回\n")
fclose(fp)
getch()
}
carcount()
{
FILE *fp
int i,n=0
fp=fopen("car.txt","r")
for(i=0fread(&car[i],sizeof(struct car),1,fp)!=0i++)
{
printf("第%d张卡<卡号：%d 姓名：%s 班级：%d>\n",i+1,car[i].carnum,car[i].studentname,car[i].studentclass)
n=n+1
}
fclose(fp)
printf("目前共有%d本书\n",n)
printf("按任意键\n")
getch()
}
delcar()
{
FILE *fp,*fp2
int i
int carnum
char choice
fp=fopen("car.txt","r")
fp2=fopen("bookl.txt","w")
printf("请输入你要删除的卡号\n")
printf("如果你输入的卡号存在，系统自动删除该信息！如果不存在，系统不做任何改动\n")
scanf("%d",&carnum)
for(i=0fread(&car[i],sizeof(struct car),1,fp)!=0i++)
{
if(car[i].carnum!=carnum)
{
fwrite(&car[i],sizeof(struct car),1,fp2)
}
}
fclose(fp)
fclose(fp2)
printf("是否真的要删除该卡？删除后该书籍的所有信息将无法恢复《Y/N》\n")
scanf("%s",&choice)
if(choice=='y'||choice=='Y')
{
fp=fopen("car.txt","w")
fp2=fopen("bookl.txt","r")
for(i=0fread(&car[i],sizeof(struct car),1,fp2)!=0i++)
{
fwrite(&car[i],sizeof(struct car),1,fp)
}
fclose(fp)
fclose(fp2)
fp2=fopen("bookl.txt","w")
fclose(fp2)
printf("按任意键返回\n")
getch()
return
}
else
{
printf("按任意键返回\n")
getch()
return
}
}
addcar()
{
FILE *fp
int i=0
fp=fopen("car.txt","a+")
printf("请你输入卡号\n")
scanf("%d",&car[i].carnum)
printf("请你输入学生姓名\n")
scanf("%s",car[i].studentname)
printf("请你输入班级\n")
scanf("%d",&car[i].studentclass)
fwrite(&car[i],sizeof(struct car),1,fp)
fclose(fp)
printf("输入完毕，任意键返回\n")
getch()
}
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