标签：namespace int a* clu class stream span describe double
#include<cstdio> #include<iostream> using namespace std; int n,x,a,b; int main() { cin>>n>>x>>a>>b; double ans=n*(a*x*1.0/100+b*(100-x)*1.0/100); printf("%.2lf",ans); return 0; }
标签：namespace int a* clu class stream span describe double
原文地址：https://www.cnblogs.com/zhanglichen/p/12332793.html
