[問題] 關於float、double資料型態的運用??
開發平台(Platform): (Ex: VC++, GCC, Linux, ...)
dev-c++
額外使用到的函數庫(Library Used): (Ex: OpenGL, ...)
問題(Question):
餵入的資料(Input):
預期的正確結果(Expected Output):
錯誤結果(Wrong Output):
結果都是0元?? 已爬過文了...但仍不明為何??
已在money和printf()內都加過double或float了..輸出都是0元...
請問我這個程式應怎麼改...才能不論輸入幾元...都可正常輸出正確答案呢??
程式碼(Code):(請善用置底文網頁, 記得排版)
#include <stdio.h>
#include <stdlib.h>
int main(void){
double money;
char ch;
printf("請輸入購買金額: ");
scanf("%d",&money);
printf("請告知是否為VIP(N/Y)?: ");
scanf(" %c",&ch);
if(ch=='y'||ch=='Y')
money *= 0.5;
else
money *= 0.9;
printf("需支付金額為%f元\n",(double)money) ;
system("pause");
return 0;
}
補充說明(Supplement):
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.46.113.23
→
07/05 20:26, , 1F
07/05 20:26, 1F
→
07/05 20:27, , 2F
07/05 20:27, 2F
→
07/05 21:04, , 3F
07/05 21:04, 3F
→
07/05 21:05, , 4F
07/05 21:05, 4F
→
07/05 21:06, , 5F
07/05 21:06, 5F
→
07/05 21:07, , 6F
07/05 21:07, 6F
→
07/05 21:09, , 7F
07/05 21:09, 7F
→
07/05 21:09, , 8F
07/05 21:09, 8F
→
07/05 21:09, , 9F
07/05 21:09, 9F
→
07/05 21:11, , 10F
07/05 21:11, 10F
→
07/05 22:36, , 11F
07/05 22:36, 11F
→
07/06 11:04, , 12F
07/06 11:04, 12F