#include<bits/stdc++.h>
using namespace std;
int main()
{
	char b;
	int x,a; 
	cin>>x>>a>>b;
	if(b=='+') {
	cout<<x+a;
	} else if(b=='-') {
	cout<<x-a;
	} if(b=='/') {
	cout<<x/a;
	}if(b=='*') {
	cout<<x*a;
	}  
	 
	return 0;
}

#include<iostream> using namespace std; int main() { int a,b; char c; cin>>a>>b>>c; if(c=='+') { cout<<a+b; } else if(c=='-') { cout<<a-b; } else if(c=='') { cout<<ab; } else if(c=='/') { if(b==0) { cout<<"Divided by zero!"; } else { cout<<a/b; } } else { cout<<"Invalid operator!"; } return 0; }

SOS

#include<iostream> using namespace std; int main() { int a,b; char c; cin>>a>>b>>c; if(c=='+') { cout<<a+b; } else if(c=='-') { cout<<a-b; } else if(c=='') { cout<<ab; } else if(c=='/') { if(b==0) { cout<<"Divide by zero"; } else { cout<<a/b; } } else { cout<<"Invalid operator"; } return 0; }