某快递公司邮寄快件的收费标准是：每件重量不超过1kg收费10元当超过1kg时超过部分每05kg加收3元不足05kg按照05kg收费。用C语言编写程序输入邮件重量计算并输出相应的邮费

#include <stdio.h>

int main()
{
    float weight, fee;
    printf("请输入邮件重量（kg）：");
    scanf("%f", &weight);
    if (weight <= 1)
    {
        fee = 10;
    }
    else if (weight > 1)
    {
        int delta = weight - 1;
        if (delta % 0.5 == 0)
        {
            fee = 10 + delta / 0.5 * 3;
        }
        else
        {
            fee = 10 + (delta / 0.5 + 1) * 3;
        }
    }
    printf("邮费为：%.2f元\n", fee);
    return 0;
}