Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
623 关清声 书的价格 C++ Compile Error 0 MS 0 KB 475 2022-12-23 21:04:42

Tests(0/0):

Code:

#include<iostream> #include<algorithm> using namespace std; struct book { float price; char name[30]; }; bool cmp(book x,book y) { return x<y; } int main() { int n; cin>>n; struct book a[n]; for(int i=0;i<n;i++) { cin>>a[i].name>>a[i].price; } sort(a,a+n,cmp); printf("%.2lf ",a[n-1].price); cout<<a[n-1].name<<endl; printf("%.2lf ",a[0].price); cout<<a[0].name<<endl; return 0; }

Run Info:

Main.cc: In function 'bool cmp(book, book)':
Main.cc:11:13: error: no match for 'operator<' (operand types are 'book' and 'book')
     return x constexpr bool std::operator<(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)
     operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
     ^
/usr/include/c++/4.8.2/bits/stl_pair.h:220:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::pair<_T1, _T2>'
     return x bool std::operator<(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)
     operator<(const reverse_iterator<_Iterator>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:297:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::reverse_iterator<_Iterator>'
     return x bool std::operator<(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)
     operator<(const reverse_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:347:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::reverse_iterator<_Iterator>'
     return x bool std::operator<(const std::move_iterator<_Iterator>&, const std::move_iterator<_IteratorR>&)
     operator<(const move_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:1055:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::move_iterator<_Iterator>'
     return x bool std::operator<(const std::move_iterator<_Iterator>&, const std::move_iterator<_Iterator>&)
     operator<(const move_iterator<_Iterator>& __x,
     ^
/usr/include/c++/4.8.2/bits/stl_iterator.h:1061:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::move_iterator<_Iterator>'
     return x bool std::operator<(const std::basic_string<_CharT, _Traits, _Alloc>&, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2569:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
     return x bool std::operator<(const std::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2581:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
     return x bool std::operator<(const _CharT*, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator<(const _CharT* __lhs,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2593:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   mismatched types 'const _CharT*' and 'book'
     return x bool std::operator<(const std::vector<_Tp, _Alloc>&, const std::vector<_Tp, _Alloc>&)
     operator<(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
     ^
/usr/include/c++/4.8.2/bits/stl_vector.h:1421:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::vector<_Tp, _Alloc>'
     return x bool std::operator<(const std::array<_Tp, _Nm>&, const std::array<_Tp, _Nm>&)
     operator<(const array<_Tp, _Nm>& __a, const array<_Tp, _Nm>& __b)
     ^
/usr/include/c++/4.8.2/array:238:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::array<_Tp, _Nm>'
     return x constexpr bool std::operator<(const std::tuple<_Elements ...>&, const std::tuple<_Elements ...>&)
     operator<(const tuple<_TElements...>& __t,
     ^
/usr/include/c++/4.8.2/tuple:824:5: note:   template argument deduction/substitution failed:
Main.cc:11:14: note:   'book' is not derived from 'const std::tuple<_Elements ...>'
     return x<y;
              ^
Main.cc:12:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^