归类了 OJ，整理了一下

XSM OJ 重庆小码王集团OJ/简单的计算器.cpp

@@ -0,0 +1,33 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main(){
+	int a;
+	int b;
+	char c;
+	cin >>a>>b>>c;
+	switch(c){
+		case '+':
+			cout <<a+b;
+			break;
+			case '-':
+				cout <<a-b;
+				break;
+				case '*':
+				cout <<a*b;
+				break;
+				case '/':
+					if(b==0){
+						cout <<"Divided by zero!";
+						break;
+					}
+					else{
+						cout <<a/b;
+						break;
+					}
+					default:
+						cout <<"Invalid operator!";
+						break;
+						
+	}	
+	return 0;
+}