Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
150076 余建成 求序列的前n项和 C++ Compile Error 0 MS 0 KB 235 2026-03-22 10:42:29

Tests(0/0):

Code:

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

Run Info:

Main.cc:4:2: error: expected initializer before 'int'
  int i,n;
  ^
Main.cc:6:2: error: 'a' does not name a type
  a=2,b=1,sum=0;
  ^
Main.cc:7:2: error: 'cin' does not name a type
  cin>>n;
  ^
Main.cc:8:2: error: expected unqualified-id before 'for'
  for(i=1;i<=n;i=+){
  ^
Main.cc:8:10: error: 'i' does not name a type
  for(i=1;i<=n;i=+){
          ^
Main.cc:8:15: error: 'i' does not name a type
  for(i=1;i<=n;i=+){
               ^
Main.cc:14:2: error: 'cout' does not name a type
  cout<