怎么样修改？

停车场三小时内的最少收费2。00美元，超过三小时每增加一小时需要收取0。5美元的附加费，24小时之内的最多收费是10美元，假设没有车子一次停车超过24小时。编写一个程序，计算并显示昨天的天个客户各自的停车费用，输出使用下面的格式：
     car                hour               charge
     1                  1.50                2.00
     2                  4.0                 2.50
     3                  24.0                10.00
    Total               29.5                14.50
下面是我写的程序：（和要求不一样，请各位帮忙看看是哪里错了）
#include <iostream>
#include<cmath>
#include<iomanip>
using namespace std;
int main()
{float h,h1,h2,h3,ch,ch1,ch2,ch3,t1,t2;
    cout<<"Enter hour:  ";
    cin>>h1>>h2>>h3;
    h=h1,h2,h3;
    if(h>0&&h<=3)
    {ch=2.00;
    cout<<ch<<endl;
    }
    else if(h>3&&h<=19)
    {
        ch=0.5*h+0.5;
        cout<<ch<<endl;
    }
    else
    {ch=10.00;
    cout<<ch<<endl;
    }
    if(h=h1)
    {ch1=ch;
    }
    else if(h=h2)
    {ch2=ch;
    }
    else
    {ch3=ch;
    }
    t1=h1+h2+h3;
    t2=ch1+ch2+ch3;
    cout<<setiosflags(ios::fixed)<<setprecision(2);
    cout<<"\t"<<"car"<<"\t\t"<<"hour"<<"\t\t"<<"charge"<<endl;
    cout<<"\t"<<1<<"\t\t"<<h1<<"\t\t"<<ch1<<endl;
    cout<<"\t"<<2<<"\t\t"<<h2<<"\t\t"<<ch2<<endl;
    cout<<"\t"<<3<<"\t\t"<<h3<<"\t\t"<<ch3<<endl;
    cout<<"\t"<<"Total"<<"\t\t"<<t1<<"\t\t"<<t2<<endl;
    return 0;
}
和要求不一样请各位帮忙看看是哪里错了。谢谢了。