Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
147471 孔声豪 求序列的前n项和 C++ Compile Error 0 MS 0 KB 225 2026-02-05 12:26:19

Tests(0/0):

Code:

#include<iostream> using namespace std; int main(){ int a=1,b=2;c,n,sum=0,i; cin>>n; for(i=1;i<=n;i++){ c=a+b; sum+=c; a=b; b=c; } cout<<sum<<endl; return 0; }

Run Info:

Main.cc: In function 'int main()':
Main.cc:4:16: error: 'c' was not declared in this scope
    int a=1,b=2;c,n,sum=0,i;
                ^
Main.cc:4:18: error: 'n' was not declared in this scope
    int a=1,b=2;c,n,sum=0,i;
                  ^
Main.cc:4:20: error: 'sum' was not declared in this scope
    int a=1,b=2;c,n,sum=0,i;
                    ^
Main.cc:4:26: error: 'i' was not declared in this scope
    int a=1,b=2;c,n,sum=0,i;
                          ^