当我输入'Y'时，为什么这个程序跳过首先传递给else？

Question

我似乎无法找到此代码中的错误的位置。当我输入'Y'时，它跳过第一个if语句并计算下面的else语句。我有其他问题还是其他问题？我是初学者，所以如果我看到它，我就不会知道它。代码不一定很漂亮或完美，它只需要工作。我是否需要if else语句而不是if？当我使用如果其他它告诉我我有一个语法错误。正如你所看到的，我正在试图根据买方是不是老师来计算折扣和销售税。我还需要输入多少来提交问题。我对此也很陌生，所以如果格式不正确，我表示歉意。如果购买价格大于100，则折扣为12％，如果低于100则折扣为10％。该计划将打印出折扣，税款和总价的收据。

#include <stdio.h> 
#include <stdlib.h>`` 
#define SALES_TAX 0.05 
#define REG_DISCOUNT 0.10 
#define DISCOUNT 0.12 

int main() 
{ 
    double price, discount,total,x,tax; 

    printf("Enter purchase total=>"); 
    scanf("%lf",&total); 
    printf("If you are a teacher enter Y if not enter N=>"); 
    scanf("%lf",&x); 

    if(x=='Y'){ 

     if(total<100) 
      { 
      discount = total * REG_DISCOUNT; 
      tax = (total - discount)* SALES_TAX; 
      price = total - discount + tax; 
      } 
     else{ 
      discount = total * DISCOUNT; 
      tax = (total - discount)* SALES_TAX; 
      price = total + tax - discount; 

      } 
     printf("The total price of your items is = $%.2f.\n",total); 
        printf("Your 12 percent discount = $%.2f.\n",discount); 
        printf("You're total tax is $%.2f.\n",tax); 
        printf("You're final purchase price is $%.2f.\n",price); 
    } 
    else { 
     tax = total * SALES_TAX; 
     price = total + tax; 
     printf("The total price of your items is $%.2f.\n",total); 
     printf("Your total tax is $%.2f.\n",tax); 
     printf("Your total purchase price with tax is $%.2f.\n",price); 
     } 
    return(0); 
} 

Answer 1

读取字符串X的scanf语句的格式代码表示浮点数。尝试使用％s