编程之美预赛A题

#include<iostream>
#include<string>
#include<cstdio>
using namespace std;
double ans;
void yuan1(string s)
{
    if(s=="m") ans=ans*1000;
    if(s=="dm") ans=ans*100;
    if(s=="cm") ans=ans*10;
    if(s=="um") ans=ans*0.001;
    if(s=="nm") ans=ans*1e-6;
}
void yuan2(string s)
{
    if(s=="m") ans=ans/1000;
    if(s=="dm") ans=ans/100;
    if(s=="cm") ans=ans/10;
    if(s=="um") ans=ans/0.001;
    if(s=="nm") ans=ans/1e-6;
}
int main()
{
    int cnt=1;
    int t;
    string s1,s2,s3;
    double a,b,c;
    scanf("%d",&t);
    while(t--){
        cin>>a>>s1>>b>>s2>>c>>s3;
        //cout<<s1<<" "<<s2<<" "<<s3<<" "<<endl;
        ans=a*c/b;
        //cout<<ans<<endl;
        yuan1(s1);
        yuan2(s2);
        printf("Case %d: %.2lfpx\n",cnt++,ans);
    }
    return 0;
}