Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
7322 张育斌 素数对 C++ Compile Error 0 MS 0 KB 646 2025-04-19 15:26:54

Tests(0/0):

Code:

#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; bool asd(int x){ if(x<2) return false; bool f=true; for(int i=2;i<=sqrt(x);i++){ if(x%i==0) return false; } return true; } int main(){ int n; bool f=false; cin>>n; for(int i=1;i<=n-2;i++){ if(asd(i)&&asd(i+2)){ cout<<i<<" "<<i+2<<end; f=true; } } if(f==false){ cout<"No"; } return 0; }

Run Info:

Main.cc: In function 'bool asd(int)':
Main.cc:9:10: warning: unused variable 'f' [-Wunused-variable]
     bool f=true;
          ^
Main.cc: In function 'int main()':
Main.cc:21:26: error: no match for 'operator<' (operand types are 'std::basic_ostream' and '')
         cout::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(std::basic_ostream<_CharT, _Traits>::__ostream_type& (*)(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(__ostream_type& (*__pf)(__ostream_type&))
       ^
/usr/include/c++/4.8.2/ostream:108:7: note:   no known conversion for argument 1 from '' to 'std::basic_ostream::__ostream_type& (*)(std::basic_ostream::__ostream_type&) {aka std::basic_ostream& (*)(std::basic_ostream&)}'
/usr/include/c++/4.8.2/ostream:117:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(std::basic_ostream<_CharT, _Traits>::__ios_type& (*)(std::basic_ostream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream; std::basic_ostream<_CharT, _Traits>::__ios_type = std::basic_ios]
       operator<(__ios_type& (*__pf)(__ios_type&))
       ^
/usr/include/c++/4.8.2/ostream:117:7: note:   no known conversion for argument 1 from '' to 'std::basic_ostream::__ios_type& (*)(std::basic_ostream::__ios_type&) {aka std::basic_ios& (*)(std::basic_ios&)}'
/usr/include/c++/4.8.2/ostream:127:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(ios_base& (*__pf) (ios_base&))
       ^
/usr/include/c++/4.8.2/ostream:127:7: note:   no known conversion for argument 1 from '' to 'std::ios_base& (*)(std::ios_base&)'
/usr/include/c++/4.8.2/ostream:166:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(long int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(long __n)
       ^
/usr/include/c++/4.8.2/ostream:166:7: note:   no known conversion for argument 1 from '' to 'long int'
/usr/include/c++/4.8.2/ostream:170:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(long unsigned int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(unsigned long __n)
       ^
/usr/include/c++/4.8.2/ostream:170:7: note:   no known conversion for argument 1 from '' to 'long unsigned int'
/usr/include/c++/4.8.2/ostream:174:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(bool) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(bool __n)
       ^
/usr/include/c++/4.8.2/ostream:174:7: note:   no known conversion for argument 1 from '' to 'bool'
In file included from /usr/include/c++/4.8.2/ostream:612:0,
                 from /usr/include/c++/4.8.2/iostream:39,
                 from Main.cc:1:
/usr/include/c++/4.8.2/bits/ostream.tcc:91:5: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<(short int) [with _CharT = char; _Traits = std::char_traits]
     basic_ostream<_CharT, _Traits>::
     ^
/usr/include/c++/4.8.2/bits/ostream.tcc:91:5: note:   no known conversion for argument 1 from '' to 'short int'
In file included from /usr/include/c++/4.8.2/iostream:39:0,
                 from Main.cc:1:
/usr/include/c++/4.8.2/ostream:181:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(short unsigned int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(unsigned short __n)
       ^
/usr/include/c++/4.8.2/ostream:181:7: note:   no known conversion for argument 1 from '' to 'short unsigned int'
In file included from /usr/include/c++/4.8.2/ostream:612:0,
                 from /usr/include/c++/4.8.2/iostream:39,
                 from Main.cc:1:
/usr/include/c++/4.8.2/bits/ostream.tcc:105:5: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<(int) [with _CharT = char; _Traits = std::char_traits]
     basic_ostream<_CharT, _Traits>::
     ^
/usr/include/c++/4.8.2/bits/ostream.tcc:105:5: note:   no known conversion for argument 1 from '' to 'int'
In file included from /usr/include/c++/4.8.2/iostream:39:0,
                 from Main.cc:1:
/usr/include/c++/4.8.2/ostream:192:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(unsigned int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(unsigned int __n)
       ^
/usr/include/c++/4.8.2/ostream:192:7: note:   no known conversion for argument 1 from '' to 'unsigned int'
/usr/include/c++/4.8.2/ostream:201:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(long long int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(long long __n)
       ^
/usr/include/c++/4.8.2/ostream:201:7: note:   no known conversion for argument 1 from '' to 'long long int'
/usr/include/c++/4.8.2/ostream:205:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(long long unsigned int) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(unsigned long long __n)
       ^
/usr/include/c++/4.8.2/ostream:205:7: note:   no known conversion for argument 1 from '' to 'long long unsigned int'
/usr/include/c++/4.8.2/ostream:220:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(double) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(double __f)
       ^
/usr/include/c++/4.8.2/ostream:220:7: note:   no known conversion for argument 1 from '' to 'double'
/usr/include/c++/4.8.2/ostream:224:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(float) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(float __f)
       ^
/usr/include/c++/4.8.2/ostream:224:7: note:   no known conversion for argument 1 from '' to 'float'
/usr/include/c++/4.8.2/ostream:232:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(long double) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(long double __f)
       ^
/usr/include/c++/4.8.2/ostream:232:7: note:   no known conversion for argument 1 from '' to 'long double'
/usr/include/c++/4.8.2/ostream:245:7: note: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<(const void*) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream]
       operator<(const void* __p)
       ^
/usr/include/c++/4.8.2/ostream:245:7: note:   no known conversion for argument 1 from '' to 'const void*'
In file included from /usr/include/c++/4.8.2/ostream:612:0,
                 from /usr/include/c++/4.8.2/iostream:39,
                 from Main.cc:1:
/usr/include/c++/4.8.2/bits/ostream.tcc:119:5: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<(std::basic_ostream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits; std::basic_ostream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf]
     basic_ostream<_CharT, _Traits>::
     ^
/usr/include/c++/4.8.2/bits/ostream.tcc:119:5: note:   no known conversion for argument 1 from '' to 'std::basic_ostream::__streambuf_type* {aka std::basic_streambuf*}'
In file included from /usr/include/c++/4.8.2/string:52:0,
                 from /usr/include/c++/4.8.2/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8.2/bits/ios_base.h:41,
                 from /usr/include/c++/4.8.2/ios:42,
                 from /usr/include/c++/4.8.2/ostream:38,
                 from /usr/include/c++/4.8.2/iostream:39,
                 from Main.cc:1:
/usr/include/c++/4.8.2/bits/basic_string.h:2753:5: note: template std::basic_ostream<_CharT, _Traits>& std::operator<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator<(basic_ostream<_CharT, _Traits>& __os,
     ^
/usr/include/c++/4.8.2/bits/basic_string.h:2753:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   couldn't deduce template parameter '_Alloc'
         cout& std::operator<(std::basic_ostream<_CharT, _Traits>&, _CharT) [with _CharT = char; _Traits = std::char_traits]
     operator<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
     ^
/usr/include/c++/4.8.2/ostream:471:5: note:   no known conversion for argument 2 from '' to 'char'
/usr/include/c++/4.8.2/ostream:476:5: note: template std::basic_ostream<_CharT, _Traits>& std::operator<(std::basic_ostream<_CharT, _Traits>&, char)
     operator<(basic_ostream<_CharT, _Traits>& __out, char __c)
     ^
/usr/include/c++/4.8.2/ostream:476:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   cannot convert 'std::end' (type '') to type 'char'
         cout std::basic_ostream& std::operator<(std::basic_ostream&, char)
     operator<(basic_ostream& __out, char __c)
     ^
/usr/include/c++/4.8.2/ostream:482:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   cannot convert 'std::end' (type '') to type 'char'
         cout std::basic_ostream& std::operator<(std::basic_ostream&, signed char)
     operator<(basic_ostream& __out, signed char __c)
     ^
/usr/include/c++/4.8.2/ostream:488:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   cannot convert 'std::end' (type '') to type 'signed char'
         cout std::basic_ostream& std::operator<(std::basic_ostream&, unsigned char)
     operator<(basic_ostream& __out, unsigned char __c)
     ^
/usr/include/c++/4.8.2/ostream:493:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   cannot convert 'std::end' (type '') to type 'unsigned char'
         cout& std::operator<(std::basic_ostream<_CharT, _Traits>&, const _CharT*) [with _CharT = char; _Traits = std::char_traits]
     operator<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
     ^
/usr/include/c++/4.8.2/ostream:513:5: note:   no known conversion for argument 2 from '' to 'const char*'
In file included from /usr/include/c++/4.8.2/ostream:612:0,
                 from /usr/include/c++/4.8.2/iostream:39,
                 from Main.cc:1:
/usr/include/c++/4.8.2/bits/ostream.tcc:321:5: note: template std::basic_ostream<_CharT, _Traits>& std::operator<(std::basic_ostream<_CharT, _Traits>&, const char*)
     operator<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
     ^
/usr/include/c++/4.8.2/bits/ostream.tcc:321:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   cannot convert 'std::end' (type '') to type 'const char*'
         cout std::basic_ostream& std::operator<(std::basic_ostream&, const char*)
     operator<(basic_ostream& __out, const char* __s)
     ^
/usr/include/c++/4.8.2/ostream:530:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   cannot convert 'std::end' (type '') to type 'const char*'
         cout std::basic_ostream& std::operator<(std::basic_ostream&, const signed char*)
     operator<(basic_ostream& __out, const signed char* __s)
     ^
/usr/include/c++/4.8.2/ostream:543:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   cannot convert 'std::end' (type '') to type 'const signed char*'
         cout std::basic_ostream& std::operator<(std::basic_ostream&, const unsigned char*)
     operator<(basic_ostream& __out, const unsigned char* __s)
     ^
/usr/include/c++/4.8.2/ostream:548:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   cannot convert 'std::end' (type '') to type 'const unsigned char*'
         cout std::basic_ostream<_CharT, _Traits>& std::operator<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&)
     operator<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
     ^
/usr/include/c++/4.8.2/ostream:602:5: note:   template argument deduction/substitution failed:
Main.cc:21:28: note:   couldn't deduce template parameter '_Tp'
         cout<i<<" "<<i+2<<end;
                            ^
Main.cc:26:13: warning: value computed is not used [-Wunused-value]
         cout<"No";
             ^