其实还是挺简单的 这题其实就是a+b，只不过变成了小数。 注意两点： 1.要用double 2.保留两位小数 保留小数有两种办法，第一种用cout，第二种用printf. 1.cout<<fixed<<setprecision(2); 2.printf("%.2lf",a+b); 所以废话不多说，上代码。 #include using namespace std; int main(){ double a,b; cin>>a>>b; printf("%.2lf",a+b); return 0; }

#include<iostream> #include<iomanip> using namespace std; int main(){ float a,b; cin>>a>>b; cout<<fixed<<setprecision(2)<<a+b; }

#include <iostream> using namespace std; int main(){ double a,b; cin>>a>>b; printf("%.2f",a+b); }

#include <bits/stdc++.h> using namespace std; int main(){ double a,b; cin>>a>>b; printf("%.2lf",a+b); return 0; }

#include<iostream> #include<iomanip> using namespace std; int main(){ float a,b; cin>>a>>b; cout<<std::fixed<<setprecision(2)<<a+b; return 0; }

此题代码： *#include<bits/stdc++.h>*建议使用 #include<cstdio> using namespace std; int main(){ double a,b; cin >> a >> b; printf("%.2lf",a+b); return 0; }

#include<bits/stdc++.h> using namespace std; int main () { double a,b,c; cin>>a>>b; c=a+b; printf("%.2lf",c); }

#include <iostream> using namespace std; int main(){ double a,b; cin>>a>>b; cout<<a+b; return 0; }

#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){double a,b;cin >> a >> b;cout << fixed << setprecision(2) << a+b;}#include <iostream> #include <iomanip> using namespace std;int main(){do

A1.A+B problem,但是小数。注意需要保留两位小数，我用的是printf();语句，这个语句需要先#include<stdio.h>(万能头文件也行)，也可以直接用cout<<语句，可以参考其他题解，下面是一个可行的解决方案：

#include<iostream> #include<iomanip> using namespace std; int main(){ float a,b; cin>>a>>b; cout<<fixed<<setprecision(2)<<a+b; return 0; }

#include<iostream> using namespace std; int main() { double a,b; cin>>a>>b; printf("%.2f",a+b); return 0; }

超简单

#include<bits/stdc++.h> using namespace std; int main(){ double a , b; cin >> a >> b; cout << fixed << setprecision(2) << a + b; return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ double a,b; cin>>a>>b; printf("%.2f",a+b); }