the meaning of的《C++打字练习》成绩 - 打字成绩 - 在线打字练习（dazi.91xjr.com）

#include <bits/stdc++.h> using namespace std; int main(){ int a,b; string c; cin >> a >> b >> c; if(c == "+"){ cout << a+b; }else if(c == "-"){ cout << a-b; }else if(c == "*"){ cout << a*b; }else if(...