请帮助我解决这个问题,即使我在学校输入了代码,即使它显示了声明语法错误。-.-无法解决!。当您刚开始学习编码时,它是如此令人沮丧。
无效的问题错误:声明语法错误无效的显示错误:指针的非法使用
抱歉,如果发现我有任何愚蠢的行为。
#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <string.h>
class book
{
char bookname[20];
char isbn[20];
char author[20];
char category[20];
float price;
int noc;
public:
void accept()
{
cout<<"Enter book name :- \n";
gets(bookname);
cout<<"Enter isbn no of the book:- \n";
gets(isbn);
cout<<"Enter authour name:- \n";
gets(author);
cout<<"Enter category of book:- \n";
gets(category);
cout<<"Enter price of the book :- \n";
cin>>price;
cout<<"Enter no of copies of book available in the library :- \n";
cin>>noc;
}
void display()
{
puts(bookname)<<endl;
puts(isbn)<<endl;
puts(author)<<endl;
puts(category)<<endl;
cout<<price<<endl;
cout<<noc<<endl;
}
}b[5];
int main()
{
for(int i=0;i<5;++i)
{
b[i].accept();
}
void issue()
{
int flag=0;
char booksearch[20];
cout<<"Enter name of book member wants to issue :- \n"
gets(booksearch);
for(i=0;i<5;++i)
{
flag=strcmp(booksearch,b[i].bookname)
}
}
if(flag==1)
{
b[i].display();
b[i].issue();
}
getch();
return 0;
}
您的代码有很多错误:
strcmp
通话后缺少分号:strcmp
如果存在匹配项,则返回0,而不是1,并且您可能在循环的下一次迭代中覆盖标志,issue
位于的中间main
,这是您的代码的无效版本:http : //ideone.com/sGdXcm
这是一个固定的工作版本:
#include <iostream>
#include <string>
#include <array>
#include <limits>
using namespace std;
class book
{
std::string bookname;
std::string isbn;
std::string author;
std::string category;
float price;
int noc;
public:
const std::string& getBookname() const { return bookname; }
const std::string& getISBN() const { return isbn; }
const std::string& getAuthor() const { return author; }
const std::string& getCategory() const { return category; }
float getPrice() const { return price; }
float getNoC() const { return noc; }
void accept()
{
cout<<"Enter book name :- \n";
std::getline(std::cin, bookname);
cout<<"Enter isbn no of the book:- \n";
std::getline(std::cin, isbn);
cout<<"Enter authour name:- \n";
std::getline(std::cin, author);
cout<<"Enter category of book:- \n";
std::getline(std::cin, category);
cout<<"Enter price of the book :- \n";
std::cin>>price;
cout<<"Enter no of copies of book available in the library :- \n";
std::cin>>noc;
std::cin.ignore(std::numeric_limits<streamsize>::max(), '\n');
}
void display()
{
std::cout<<bookname<<std::endl;
std::cout<<isbn<<std::endl;
std::cout<<author<<std::endl;
std::cout<<category<<std::endl;
std::cout<<price<<std::endl;
std::cout<<noc<<std::endl;
}
void issue()
{
}
};
int main()
{
std::array<book, 5> b;
for(int i=0;i<b.size();++i)
{
b[i].accept();
}
std::string booksearch;
std::cout<<"Enter name of book member wants to issue :- \n";
std::getline(cin, booksearch);
std::cout<<"Searching for: " << booksearch << "\n";
for(int i=0;i<b.size();++i)
{
if (b[i].getBookname() == booksearch)
{
b[i].display();
b[i].issue();
break;
}
}
std::string dummy;
std::cout << "Hit return:";
std::getline(std::cin, dummy);
return 0;
}
现场演示:http://ideone.com/p3Ygw3
注意:我没有在此代码中添加任何错误检查,如果用户在输入书籍时输入错误,则会出错。
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句