131877

Run ID	作者	问题	语言	测评结果	Time	Memory	代码长度	提交时间
131877	李茗宇	13求1+2-3+4-5+……n的值	C++	Compile Error	0 MS	0 KB	372	2025-10-01 17:02:52

Tests(0/0):

Code:

#include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,s=1; cin>>n; for(int i=1;i<=n;i++){ if(i%2*1.0==0){ s=i+s; } else{ s=i-s; } } cout<<s; return 0; }

Run Info:

Main.cc: In function 'int main()':
Main.cc:8:5: error: 'cin' was not declared in this scope
     cin>>n;
     ^
Main.cc:17:5: error: 'cout' was not declared in this scope
     cout<