Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
127550 丁海扬 外围元素之和 C++ Compile Error 0 MS 0 KB 259 2025-07-28 15:12:07

Tests(0/0):

Code:

#include<bits/stdc++.h> using namespace std; int main() { int a[100][100],m,n; cin>>n>>m; for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) { cin>>a[i][j]; if(i==0 || j==0 || i==n || j==n) sum+=a[i][j]; } cout<<sum; return 0; }

Run Info:

Main.cc: In function 'int main()':
Main.cc:12:5: error: 'sum' was not declared in this scope
     sum+=a[i][j];
     ^
Main.cc:14:8: error: 'sum' was not declared in this scope
  cout<