友友们帮我看下这个怎么写

友友们这个是选择结构的，我写了但是不对，可以帮我看怎么写嘛？

#include <stdio.h>
int main ()
{
    float s,pay,tax;
    scanf("%1f",&s);
    if(s<0){ printf("error");
    }else{ if(s-5000>80000){
        tax=(s-5000)*0.45-15160;
    }else if(s-5000>55000 && s-5000<=80000){
        tax=(s-5000)*0.35-7160;
    }else if(s-5000>35000 && s-5000<=55000){
        tax=(s-5000)*0.30-4410;
    }else if(s-5000>25000 && s-5000<=35000){
        tax=(s-5000)*0.25-2660;
    }else if(s-5000>12000 && s-5000<=25000){
        tax=(s-5000)*0.20-1410;
    }else if(s-5000>3000 && s-5000<=12000){
        tax=(s-5000)*0.10-210;
    }else if(s-5000<=3000 && s-5000>0){
        tax=(s-5000)*0.03;
    }else if(s<=5000){
        tax=0;
    }
    pay=s-tax;
    printf("tax:%.21f,pay:%.21f\n",tax,pay);
    }
    
return 0;
}

题目要求是什么？
编译报错吗？
程序稍微改了一下，保证都是float类型

#include <stdio.h>
int main ()
{
    float s,pay,tax;
    scanf("%f",&s);
    if(s<0)
    { 
        printf("error");
    }
    else
    { 
        if(s-5000>80000)
        {
            tax=(s-5000)*0.45-15160;
        }
        else if(s-5000>55000 && s-5000<=80000)
        {
            tax=(s-5000)*0.35-7160;
        }else if(s-5000>35000 && s-5000<=55000)
        {
            tax=(s-5000)*0.30-4410;
        }else if(s-5000>25000 && s-5000<=35000)
        {
            tax=(s-5000)*0.25-2660;
        }else if(s-5000>12000 && s-5000<=25000)
        {
            tax=(s-5000)*0.20-1410;
        }else if(s-5000>3000 && s-5000<=12000)
        {
            tax=(s-5000)*0.10-210;
        }else if(s-5000<=3000 && s-5000>0)
        {
            tax=(s-5000)*0.03;
        }else if(s<=5000)
        {
            tax=0;
        }
        pay=s-tax;
        printf("tax:%.21f,pay:%.21f\n",tax,pay);
    }
    
return 0;
}