Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
72728 周梓易 合法的标识符 C++ Compile Error 0 MS 0 KB 383 2024-05-12 16:30:58

Tests(0/0):

Code:

#include<bits/stdc++.h> using namespace std; int main() { string s; cin>>s; int len=s.size(); if(s[0]>='0'&&s[0]<='9'){ cout<<"0"; return 0; } for(int i=0;i<len;i++){ if(s[i]>='0'&&s[i]<='9'){ }else if(s[i]>='a'&&s[i]<='z'); }else if(s[i]>='A'&&s[i]<='Z'); }else if(s[i]>=='_'); }else{ cout<<"no"; } } return 0; }

Run Info:

Main.cc: In function 'int main()':
Main.cc:17:4: error: 'else' without a previous 'if'
   }else if(s[i]>='A'&&s[i]<='Z');
    ^
Main.cc:17:14: error: 'i' was not declared in this scope
   }else if(s[i]>='A'&&s[i]<='Z');
              ^
Main.cc: At global scope:
Main.cc:19:4: error: expected unqualified-id before 'else'
   }else if(s[i]>=='_');
    ^
Main.cc:21:3: error: expected declaration before '}' token
   }else{
   ^