Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
154551 田子熙 反转字符串 C++ Compile Error 0 MS 0 KB 166 2026-05-30 17:03:32

Tests(0/0):

Code:

#include<bits/stdc++.h> using namespace std; int main(){ string a; getline(cin,a); for(int i=a.length()-1;i>=0;i--){ cout<<a[i]<" "; } return 0; }

Run Info:

Main.cc: In function 'int main()':
Main.cc:7:13: error: no match for 'operator<' (operand types are 'std::basic_ostream' and 'const char [2]')
   cout< 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++/5/bits/stl_pair.h:220:5: note:   template argument deduction/substitution failed:
Main.cc:7:14: note:   'std::basic_ostream' is not derived from 'const std::pair<_T1, _T2>'
   cout<