#include <bits/stdc++.h>

using namespace std;

int main (){

cout << "--------------------------------------" << endl;

cout << "----------欢迎来到我的计算机----------" << endl;

cout << "1.加法 2.减法 3.乘法 4.除法 5.取余" << endl;

cout << "------请输入你要用的运算符号编号------" << endl;

cout << "--------------------------------------" << endl;

char a,b;

int type;

cin >> type;

cout << "-------请输入两个数(用空格分隔)-------" << endl;

cin >> a >> b;

if(type=='1'){

cout << a+b << endl;

}

else if(type=='2'){

  cout << a-b << endl;

}

else if(type=='3'){

  cout << a*b << endl;

}

else if(type=='4'){

cout << a/b << endl;

}

else if(type=='5'){

cout << a%b << endl;	

}

return 0;

}