关于#c++#的问题：这个用Dev C++该怎么写啊
这个图书馆信息系统用Dev C++改写一个什么样的代码，需要包含下方内容，没有一点头绪。
创建文件信息，基本信息管理，图书流通管理，图书统计，借书统计报表，图书查询
// (1)主函数
void main() { /*主函数*/
struct library *head;
int d, i, b;
for(i = 0; i < 3; i++) {
printf("\n\n\n\n\n\n\n\n\n\n\n 请用户输入口令：");
scanf("%d", &d);
if(d != 111) {
printf("口令输入错误\n");
if(i == 2) {
printf(“你已经输入3次错误口令，系统自动关闭\n”);
exit(0);
}
else
break;
}
system("cls");
do {
switch(b = menu()){
case 1: head = creat();
save(head);
break;
case 2: out(head);
break;
case 3: check(head);
save(head);
break;
case 4: scores(head);
save(head);
out(head);
break;
case 5: del(head);
save(head);
out(head);
break;
case 6: corret(head);
save(head);
out(head);
break;
case 0: printf(“谢谢使用\n”);
exit(0);
default: printf(“你所选择功能不存在请重新选择\n”);
}
}while(b != 0);
}
}
// (2)菜单和初始化
int menu() { /*菜单*/
char *menu[] = {"\n\n\n\n\n\n ========图书信息管理系统==========\n\n",
" 1. 录入功能 ","2. 浏览功能 \n\n",
" 3. 查询功能 ","4. 排序功能 \n\n",
" 5. 删除功能 ","6. 修改功能 \n\n",
" 0. 退出系统\n\n",
" ==================================\n"};
int c, i;
for(i = 0; i < 9; i++)
printf("%s",menu[i]);
do {
printf("\n 请输入选项(0~6)并按回车键:");
scanf("%d",&c);
} while(c < 0 || c > 6);
return(c);
}
《(3)(录入函数) 》
int n;
struct library *creat(void) { /*建立链表*/
struct library *head;
struct library *p1, *p2;
n = 0;
system("cls");
printf(" 这是录入功能请输入图书数据\n");
p1 = p2 = (struct library *)malloc(LEN);
head = NULL;
while(1) {
printf("登录号:");
scanf("%ld", &p1->num);
if(p1->num != 0) {
printf("书名:");
scanf("%s", p1->bookname);
printf("作者名:");
scanf("%s", p1->author);
printf("类型号:");
scanf("%s", p1->type);
printf("出版单位");
scanf("%s", p1->publishing_house);
printf("出版时间:");
scanf("%s", p1->publishing_time);
printf("价格:");
scanf("%f", &p1->sale);
printf("\n");
n = n + 1;
if(n == 1)
head = p1;
else
p2->next = p1;
p2 = p1;
p1 = (struct library *)malloc(LEN);
} else
break;
}
p2->next = NULL;
return(head);
}
《(4)(保存函数) 》
void save(struct library *head) { /*保存文件*/
FILE *fp;
if((fp = fopen("library.dat", "wb")) == NULL) {
printf("不能打开文件\n");
exit(0);
}
do {
fwrite(head, sizeof(struct library), 1, fp);
head = head->next;
} while(head != NULL);
fclose(fp);
printf("\n文件已保存\n\n\n");
}
《(5)输出函数 》
struct library *out(struct library *head) { /*读入文件*/
FILE *fp;
struct library *p1, *p2;
if((fp = fopen("library.dat","rb")) == NULL) {
printf("不能打开文件\n");
exit(0);
}
fp = fopen("library.dat", "rb");
p1 = (struct library *)malloc(LEN);
head = p2 = p1;
printf("\n 图书的数据为\n");
while(!feof(fp)) {
fread(p1, sizeof(struct library), 1, fp);
printf(" 登录号:%ld", p1->num);
printf("书名:%s", p1->bookname);
printf("作者名:%s", p1->author);
printf("类型号:%s", p1->type);
printf("出版单位:%s", p1->publishing_house);
printf("出版时间:%s", p1->publishing_time);
printf("价格:%6.2f", p1->sale);
printf("\n");
if(p1->next == 0) break;
p1 = (struct library *)malloc(LEN);
p2->next = p1;
p2 = p1;
}
p2->next = 0;
fclose(fp);
return(head);
}
《(6)查询函数 》
struct library *check(struct library *head) { /*查询函数*/
struct library *p;
char style[10], a[10];
printf(" 这是图书查询功能\n");
printf(" 请输入查询的方法：");
scanf("%s", style);
printf(" 请输入要查询%s：",style);
scanf("%s", a);
printf("你所查询的数据：\n");
if(head == NULL) {
printf("\n该列表为空表\n");
goto end;
}
p = head;
if(p != 0) {
if(strcmp(style, "bookname") == 0) {
if(strcmp(a, p->bookname) == 0) {
printf(" 登录号:%ld", p->num);
printf("书名:%s", p->bookname);
printf("作者名:%s", p->author);
printf("类型号:%s", p->type);
printf("出版单位:%s", p->publishing_house);
printf("出版时间:%s", p->publishing_time);
printf("价格:%6.2f", p->sale);
printf("\n");
} else {
do {
p = p->next;
} while(strcmp(a, p->bookname) != 0 && p->next != NULL);
printf(" 登录号:%ld", p->num);
printf("书名:%s", p->bookname);
printf("作者名:%s", p->author);
printf("类型号:%s", p->type);
printf("出版单位:%s", p->publishing_house);
printf("出版时间:%s", p->publishing_time);
printf("价格:%6.2f", p->sale);
printf("\n");
}
}
if(strcmp(style, "author") == 0) {
if(strcmp(a, p->author) == 0) {
printf(" 登录号:%ld", p->num);
printf("书名:%s", p->bookname);
printf("作者名:%s", p->author);
printf("类型号:%s", p->type);
printf("出版单位:%s", p->publishing_house);
printf("出版时间:%s", p->publishing_time);
printf("价格:%6.2f", p->sale);
printf("\n");
} else {
do {
p = p->next;
} while(strcmp(a, p->author) != 0 && p->next != NULL);
printf(" 登录号:%ld",p->num);
printf("书名:%s",p->bookname);
printf("作者名:%s",p->author);
printf("类型号:%s",p->type);
printf("出版单位:%s",p->publishing_house);
printf("出版时间:%s",p->publishing_time);
printf("价格:%6.2f",p->sale);
printf("\n");
}
}
}
end: return(head);
}
《(7)排序函数 》
struct library *scores(struct library *head) { /*排序函数*/
struct library *p1, *p2;
float i;
long t;
char a[20], b[20], c[20], d[20], e[20];
p1 = head;
if(head == NULL) {
printf("该列表为空表\n");
} else {
while(p1 != NULL){
p2 = p1->next;
while(p2 != NULL) {
if(strcmp(p1->bookname, p2->bookname) >= 0) {
t = p2->num;
p2->num = p1->num;
p1->num = t;
i = p2->sale;
p2->sale = p1->sale;
p1->sale = i;
strcpy(a, p2->bookname);
strcpy(b, p2->author);
strcpy(c, p2->type);
strcpy(d, p2->publishing_house);
strcpy(e, p2->publishing_time);
strcpy(p2->bookname, p1->bookname);
strcpy(p2->author, p1->author);
strcpy(p2->type, p1->type);
strcpy(p2->publishing_house, p1->publishing_house);
strcpy(p2->publishing_time, p1->publishing_time);
strcpy(p1->bookname, a);
strcpy(p1->author, b);
strcpy(p1->type, c);
strcpy(p1->publishing_house, d);
strcpy(p1->publishing_time, e);
}
p2 = p2->next;
}
p1 = p1->next;
}
}
printf("文件已排序");
return(head);
}
《(8)修改函数 》
struct library *corret(struct library *head) { /*修改函数*/
struct library *p;
char m[10], z[10];
int b, x;
float y;
printf("请输入要修改的书名：");
scanf("%s", m);
if(head==NULL) {
printf("\n该列表为空表\n");
goto end;
}
p = head;
if(p != 0) {
while((strcmp(p->bookname, m) != 0) && p->next != NULL) {
p = p->next;
}
if(strcmp(p->bookname, m) == 0) {
printf("登录号:%ld", p->num);
printf("书名:%s", p->bookname);
printf("作者名:%s", p->author);
printf("类型号:%s", p->type);
printf("出版单位:%s", p->publishing_house);
printf("出版时间:%s", p->publishing_time);
printf("价格:%6.2f", p->sale);
printf("\n");
printf("请输入要修改的类型：\n1.登录号\n2.书名\n3.作者名\n4.分类号\n5.出版单位\n6.出版时间\n7.价格\n");
scanf("%d", &b);
printf("请输入修改信息：");
if(b == 1) {
scanf("%ld", &x);
p->num = x;
} else if (b == 7) {
scanf("%f", &y);
p->sale = y;
} else {
scanf("%s",z);
switch(b) {
case 2: strcpy(p->bookname, z);
break;
case 3: strcpy(p->author, z);
break;
case 4: strcpy(p->type, z);
break;
case 5: strcpy(p->publishing_house, z);
break;
case 6: strcpy(p->publishing_time, z);
break;
default:printf("发生错误\n");
}
}
}
}
printf("文件已修改");
end: return(head);
}
《(9)删除函数 》
struct library *del(struct library *head) { /*删除函数*/
struct library *p1, *p2;
long num;
if(head == NULL) {
printf("\n图书记录为空!\n");
goto end;
}
printf("请输入要删除的图书数据的登录号:");
scanf("%ld",&num);
while(num != 0) {
p1 = head;
while(num != p1->num && p1->next != NULL) {
p2 = p1;
p1 = p1->next;
}
if(num == p1->num) {
if(p1 == head)
head = p1->next;
else
p2->next = p1->next;
printf("删除:%ld\n", num);
} else
printf("%ld 找不到这个图书记录!\n", num);
scanf("%ld", &num);
}
printf("已删除信息");
end: return(head);
}
c语言还是c++?
加个0应该有大v来搞定了
可以找我，我发了一些博客，里面有相关算法