Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
152996 张皓凯 02数字拼接 C++ Compile Error 0 MS 0 KB 184 2026-05-08 20:27:35

Tests(0/0):

Code:

#include<bits/stdc++.h> using namespace std; int main() { int a,b; cin>>a>>b; string c=string(a)+string(b); int n=int(c); cout<<n*n<<endl; return 0; }

Run Info:

Main.cc: In function 'int main()':
Main.cc:7:22: error: no matching function for call to 'std::__cxx11::basic_string::basic_string(int&)'
     string c=string(a)+string(b);
                      ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:534:9: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(_InputIterator, _InputIterator, const _Alloc&)
         basic_string(_InputIterator __beg, _InputIterator __end,
         ^
/usr/include/c++/5/bits/basic_string.h:534:9: note:   template argument deduction/substitution failed:
Main.cc:7:22: note:   candidate expects 3 arguments, 1 provided
     string c=string(a)+string(b);
                      ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:511:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(basic_string&& __str, const _Alloc& __a)
       ^
/usr/include/c++/5/bits/basic_string.h:511:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:507:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(const basic_string& __str, const _Alloc& __a)
       ^
/usr/include/c++/5/bits/basic_string.h:507:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:503:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::initializer_list<_Tp>, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
       ^
/usr/include/c++/5/bits/basic_string.h:503:7: note:   no known conversion for argument 1 from 'int' to 'std::initializer_list'
/usr/include/c++/5/bits/basic_string.h:476:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(basic_string&& __str) noexcept
       ^
/usr/include/c++/5/bits/basic_string.h:476:7: note:   no known conversion for argument 1 from 'int' to 'std::__cxx11::basic_string&&'
/usr/include/c++/5/bits/basic_string.h:464:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, _CharT, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
       basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
       ^
/usr/include/c++/5/bits/basic_string.h:464:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:454:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator] 
       basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
       ^
/usr/include/c++/5/bits/basic_string.h:454:7: note:   conversion of argument 1 would be ill-formed:
Main.cc:7:22: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
     string c=string(a)+string(b);
                      ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:444:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
       basic_string(const _CharT* __s, size_type __n,
       ^
/usr/include/c++/5/bits/basic_string.h:444:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:426:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
       basic_string(const basic_string& __str, size_type __pos,
       ^
/usr/include/c++/5/bits/basic_string.h:426:7: note:   candidate expects 4 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:410:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
       basic_string(const basic_string& __str, size_type __pos,
       ^
/usr/include/c++/5/bits/basic_string.h:410:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:398:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(const basic_string& __str)
       ^
/usr/include/c++/5/bits/basic_string.h:398:7: note:   no known conversion for argument 1 from 'int' to 'const std::__cxx11::basic_string&'
/usr/include/c++/5/bits/basic_string.h:390:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(const _Alloc& __a)
       ^
/usr/include/c++/5/bits/basic_string.h:390:7: note:   no known conversion for argument 1 from 'int' to 'const std::allocator&'
/usr/include/c++/5/bits/basic_string.h:379:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string() [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string()
       ^
/usr/include/c++/5/bits/basic_string.h:379:7: note:   candidate expects 0 arguments, 1 provided
Main.cc:7:32: error: no matching function for call to 'std::__cxx11::basic_string::basic_string(int&)'
     string c=string(a)+string(b);
                                ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:534:9: note: candidate: template std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(_InputIterator, _InputIterator, const _Alloc&)
         basic_string(_InputIterator __beg, _InputIterator __end,
         ^
/usr/include/c++/5/bits/basic_string.h:534:9: note:   template argument deduction/substitution failed:
Main.cc:7:32: note:   candidate expects 3 arguments, 1 provided
     string c=string(a)+string(b);
                                ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:511:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(basic_string&& __str, const _Alloc& __a)
       ^
/usr/include/c++/5/bits/basic_string.h:511:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:507:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(const basic_string& __str, const _Alloc& __a)
       ^
/usr/include/c++/5/bits/basic_string.h:507:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:503:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::initializer_list<_Tp>, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
       ^
/usr/include/c++/5/bits/basic_string.h:503:7: note:   no known conversion for argument 1 from 'int' to 'std::initializer_list'
/usr/include/c++/5/bits/basic_string.h:476:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(basic_string&& __str) noexcept
       ^
/usr/include/c++/5/bits/basic_string.h:476:7: note:   no known conversion for argument 1 from 'int' to 'std::__cxx11::basic_string&&'
/usr/include/c++/5/bits/basic_string.h:464:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, _CharT, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
       basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
       ^
/usr/include/c++/5/bits/basic_string.h:464:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:454:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator] 
       basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
       ^
/usr/include/c++/5/bits/basic_string.h:454:7: note:   conversion of argument 1 would be ill-formed:
Main.cc:7:32: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
     string c=string(a)+string(b);
                                ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from Main.cc:1:
/usr/include/c++/5/bits/basic_string.h:444:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
       basic_string(const _CharT* __s, size_type __n,
       ^
/usr/include/c++/5/bits/basic_string.h:444:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:426:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
       basic_string(const basic_string& __str, size_type __pos,
       ^
/usr/include/c++/5/bits/basic_string.h:426:7: note:   candidate expects 4 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:410:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]
       basic_string(const basic_string& __str, size_type __pos,
       ^
/usr/include/c++/5/bits/basic_string.h:410:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/5/bits/basic_string.h:398:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(const basic_string& __str)
       ^
/usr/include/c++/5/bits/basic_string.h:398:7: note:   no known conversion for argument 1 from 'int' to 'const std::__cxx11::basic_string&'
/usr/include/c++/5/bits/basic_string.h:390:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Alloc&) [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string(const _Alloc& __a)
       ^
/usr/include/c++/5/bits/basic_string.h:390:7: note:   no known conversion for argument 1 from 'int' to 'const std::allocator&'
/usr/include/c++/5/bits/basic_string.h:379:7: note: candidate: std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string() [with _CharT = char; _Traits = std::char_traits; _Alloc = std::allocator]
       basic_string()
       ^
/usr/include/c++/5/bits/basic_string.h:379:7: note:   candidate expects 0 arguments, 1 provided
Main.cc:8:16: error: invalid cast from type 'std::__cxx11::string {aka std::__cxx11::basic_string}' to type 'int'
     int n=int(c);
                ^