Expected constructor destructor or type conversion before token ошибка - Ремонт и установка крупной бытовой техники

I’m trying to compile my code to test a function to read and print a data file, but I get a compiling error that I don’t understand — «error: expected constructor, destructor, or type conversion before ‘;’ token». Wall of relevant code-text is below.

struct Day
{
  int DayNum;
  int TempMax;
  int TempMin;
  double Precip;
  int TempRange;
};

struct Month
{
  Day Days[31];
  int MonthMaxTemp;
  int MonthMinTemp;
  double TotalPrecip;
  int MonthMaxTempRange;
  int MonthMinTempRange;
  double AverageMaxTemp;
  double AverageMinTemp;
  int RainyDays;
  double AveragePrecip;
}theMonth;

double GetMonth();

double GetMonth()
{
  for (int Today = 1; Today < 31; Today++)
    {
      cout << theMonth.Days[Today].TempMax << theMonth.Days[Today].TempMin;
      cout << theMonth.Days[Today].Precip;
    }
  return 0;
}

GetMonth();  // compile error reported here

asked Oct 15, 2009 at 15:36

The line with the error looks like you’re trying to call GetMonth — but at the global level, a C++ program consists of a series of declarations. Since a function call isn’t a declaration, it can’t exist in isolation at the global level. You can have a declaration that’s also a definition, in which case it can invoke a function as part of initialization.

A function call by itself, however, has to be contained within some other function:

#ifdef TEST
int main() { 
    GetMonth();
}
#endif

answered Oct 15, 2009 at 15:41

Jerry CoffinJerry Coffin

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(In addition to other replies.) In order to excute your ‘GetMonth()’ function you have to either call it from another function (‘main’ or whatever is called from ‘main’) or use it in initializer expression of an object declared at namespace scope, as in

double global_dummy = GetMonth();

However, the latter method might suffer from initialization order problems, which is why it is recommended to use the former method whenever possible.

answered Oct 15, 2009 at 16:03

In C/C++, you cannot simply add executable code into the body of a header or implementation (.c,.cpp,.cxx,etc…) file. Instead you must add it to a function. If you want to have the code run on startup, make sure to add it to the main method.

int main(int argc, char *argv[]) {
  GetMonth();
}

answered Oct 15, 2009 at 15:41

JaredParJaredPar

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C++ programs don’t execute in a global context. This means you need to put the call to GetMonth into a function for it to run. int main() { } might be appropriate.

answered Oct 15, 2009 at 15:43

Andres Jaan TackAndres Jaan Tack

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Arduino Forum

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#include <iostream>
#include <cstdlib>
#include <string.h>
#include <stdio.h>
#include <iomanip>
#include <conio.h>
#define N 3
 
using std::cin;
using std::cout;
using std::endl;
 
 
class prisList {
      char *naimenovanie;
      char tipTovara;
      float cena;
      int min;
public:
       void set (char *m, char j, float k, int c);
       void get (char *m, char &j, float &k, int &c);
       void show (void);
};
       
void prisList::set (char *m, char j, float k, int c) 
{
     strcpy(naimenovanie,m);
     tipTovara=j;
     cena=k;
     min=c;
}
 
void prisList::get (char *m , char &j, float &k, int &c) 
{
     delete[] m;
     m=new char [strlen(naimenovanie)+1];
     strcpy(m,naimenovanie);
     j=tipTovara;
     k=cena;
     c=min;
}
     
void prisList::show(void)
{
     cout<<naimenovanie<<" ";
     cout<<tipTovara<<" ";
     cout<<cena<<" ";
     cout<<min<<" ";
}
 
int main()
 {
  char *a;
  char b;
  float f;
  float d;
  short p;
}
 
prisList obj[N];
clrscr();
std::cout<<"F-ya SET n"<<endl;
for (p=0; p < N; p++) 
{
    cout<<"NaimenovanieTovara, tipTovara, cenaZa1Shtyky, minColichestvoVPartii: "<<endl;
    cin>>a;
    cin>>b;
    cin>>f;
    cin>>d;
   obj[p].set(a,b,f,d);
 }
cout<<"f-ya SHOW"<<endl;
cout<<"NaimenovanieTovara, tipTovara, cenaZa1Shtyky, minColichestvoVPartii: "<<endl;
for (p=0; p < N; p++) {
    obj[p].show();
    cout<<"n";
}
cout<<"f-ii GET i SHOW"<<endl;
cout<<"NaimenovanieTovara, tipTovara, cenaZa1Shtyky, minColichestvoVPartii: "<<endl;
for (p=0; p < N; p++)
{ 
    obj[p].set(a,b,f,d);
    obj[p].show();
    cout<<"n";
}
 
system("PAUSE");
delete[] a;
return 0;
}

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Зарегистрирован: 05.12.2015

Здравствуйте, у меня вот такой скетч:

long duration,cm;

void setup()
{
  pinMode (10,OUTPUT);//на реле
pinMode (11, OUTPUT);// триг
pinMode (12, INPUT); //эхо


Serial.begin (9600);
}

void loop() {
duration = pulseIn (12,HIGH);
cm = duration/29/2;

if (cm<20){ digitalWrite(10, HIGH); } //если менее 10см - выключаем


else if (cm<=150) // Если расстояние менее 150 сантиметров 

{ 
   digitalWrite(10, LOW); // Включаем светодиод 
   
  
   delay(500000); //задержка на выключение 
}  
else 
{ 
   digitalWrite(10, HIGH); // иначе выключаем
} 
  }
  
else
{
digitalWrite(10, HIGH);  // включаем LOW
}
Serial.print(cm);
Serial.print("CM");
Serial.println ();
  
delay(100); // делает замер каждые  -- сек

}

При компиляции скетча вылетет такая ошибка:

Arduino: 1.6.0 (Windows 8), Плата»Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)»

HC-SR04.ino:44:1: error: stray » in program

HC-SR04.ino:34:1: error: expected unqualified-id before ‘else’

HC-SR04.ino:38:1: error: ‘Serial’ does not name a type

HC-SR04.ino:39:1: error: ‘Serial’ does not name a type

HC-SR04.ino:40:1: error: ‘Serial’ does not name a type

HC-SR04.ino:42:6: error: expected constructor, destructor, or type conversion before ‘(‘ token

HC-SR04.ino:44:1: error: expected declaration before ‘}’ token

Ошибка компиляции.

This report would have more information with

«Отображать вывод во время компиляции»

enabled in File > Preferences.

Подскажите пожалуйста что здесь не так. В програмировании я новичёк:)

Не судите строго.

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Problem:

When trying to compile an application on Linux, you see a compiler error message like

myheader.h:23:12: error: expected constructor, destructor, or type conversion before ‘(’ token
   23 |  __declspec(dllexport) int myfunc(

Solution:

__declspec(dllexport) is a Windows-specific feature and not available on Linux. In order to fix it in a compatible way, add this code either in a header that is included in every file containing __declspec(dllexport) or add it in each file where the error occurs:

#ifdef __linux__
#define __declspec(v)
#endif

This will basically ignore any __declspec() call on the preprocessor level.

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