C++的錯誤表達，不能用作函數

-5

weekday=(day+2(month)+3(month)/5+year+year/4-year/100+year/400)/7

讓我沒有得到一個錯誤信息說「表達不能被用作函數」？

#include <iostream> 
using namespace std; 
int main() 
{ 
int date=0; 
int month=0; 
int day=0; 
int year=0; 
int leftover=0; 
int weekday=0; 

cout<<"Enter Date (ex.20140912) :"; 
cin>>date; 

year=date/10000; 
leftover=date%10000; 
month=leftover/100; 
day=date%100; 
{ 
if (month==3) 
    {cout<<"March "<< day<<", "<< year<<":"; 
     weekday=(day+2(month)+3(month)/5+year+year/4-year/100+year/400)/7; 

      if (weekday==0) 
       {cout<<"Saturday"; 
       } 
      if (weekday==1) 
       {cout<<"Sunday"; 
       } 
      if (weekday==2) 
       {cout<<"Monday"; 
       } 
      if (weekday==3) 
       {cout<<"Tuesday"; 
       } 
      if (weekday==4) 
       {cout<<"Wednesday"; 
       }

來源

2014-09-21 Jessica Lynn Martin

你爲什麼要申報工作日的價值兩次？ – Chantola 2014-09-21 23:17:25

{if（month == 3）該行開頭的左括號是錯位的。 – robbannn 2014-09-21 23:19:47

代碼2(month)是函數調用的語法，如果2是一個函數......但事實並非如此。你可能是指乘法，例如2 * month？

來源

2014-09-21 23:17:37

您需要爲乘法輸入運算符（*）：

weekday=(day+2*(month)+3*(month)/5+year+year/4-year/100+year/400)/7;

如果運營商缺少C（++）解釋爲一個函數調用，wherebthe函數名是如2。

來源

2014-09-21 23:18:08 MrTux

C++的錯誤表達，不能用作函數

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