我的团：derytsa

通用计算器：

#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
char op;
ll a,b;
template<class T>T read(){
   T r=0,f=1;char c=getchar();
   while((c<'0'||c>'9')&&c!='-'){
		c=getchar();
   }
   if(c=='-')f=-1,c=getchar();
   while(c>='0'&&c<='9')r=r*10+c-'0',c=getchar();
   return f*r;
}
ll sum(int a,int b){
	int s=0;
	for(int i=a;i<=b;++i){
		s+=i;
	}
	return s;
}
int main(){
	cout<<"温馨提示:"<<endl;
	cout<<"+加-减*乘/除%模^幂~累加"<<endl;
	cout<<"记得加空格“ ”"<<endl; 
	while(1){
		a=read<int>(),op=getchar(),b=read<int>();
		switch(op){
  			case '+':
  				cout<<a+b<<endl;break;
  			case '-':
  				cout<<abs(a-b)<<endl;break;
  			case '*':
  				cout<<a*b<<endl;break;
  			case '/':
  				if(b==0){
  					cout<<"no"<<endl;break;
				}
				else{
					cout<<ceil(a/b)<<endl;break;
				}
			case '%':
				cout<<a%b<<endl;break;
			case '^':
				cout<<pow(a,b)<<endl;break;
			case '~':
				cout<<sum(a,b)<<endl;break;
			default:
				cout<<"no"<<endl;break;
		}
	}
	return 0;
}