Question

帮助错误说

thevoid CalculatorClass :: SumComplex（）;是私人的

我添加第二个文件（不仅是标题），但问题仍然存在

calculator.h

//header file
#include<iostream>

void SumComplec();
void DifComplex();
void MultComplex();
void DivComplex();

calculator.cpp

//i calculate the result of numbers

#include <iostream.h>
#include "calculator.h"

using namespace std;

class CalculatorClass{

    //float r1,i1,r2,i2;

    void SumComplex() {  //add complex numbers

        float sumRe,sumIm;
        float r1,i1,r2,i2;

        cout << "Enter 2 complex numbers: " << endl;
        cin >> r1 >> i1 >> r2 >> i2;  //read nimber
//sum of real and imanige part of number
        sumRe = r1 + r2;
        sumIm = i1 + i2;
        if(sumIm < 0) {
            cout << "Sum is " << sumRe << sumIm << "j" << endl;
        }
        else {
            cout << "Sum is " << sumRe << "+" << sumIm << "j" << endl;
        }
    }



};

的main.c

#include <iostream.h>        //add header and other file
#include "calculator.h"
#include "calculator.cpp"

using namespace std;

int main() {

    int choise;
    char op;

    CalculatorClass CalculatorObject;  //i call class

    do {                                                                                /* Elenxos gia swsti eisagwgi epilogis */
        cout << "For complex numbers press 1,for normal numbers press 2!" << endl;
        cin >> choise;
    } while(choise != 1 && choise != 2);

    do {                                                                  /* Elenxos gia swsti eisagwgi telesti */
        cout << "Choose operator:" << endl;
        cin >> op;
    } while(op != '+' && op != '-' && op != '*' && op != '/');


    if(choise == 1) {       //if is '+' i calculate

            if(op == '+') {
                CalculatorObject.SumComplex();
            }


    }


    return 0;
}

Answer 1

默认情况下，类中的成员变量和成员函数是私有的。因此，不能直接从课堂外引用它们。

在您的情况下，成员函数SumComplex()是私有的，并在main中引用。您需要在public:定义之前写SumComplex来公开。

请注意，public:是一个开关，它与之后出现的类中的所有声明保持相关。因此，如果您在SumComplex下添加更多内容，它也会公开，直到您明确切换回private:。

Answer 2

我猜你的班级结构应该是这样的：

<强> calculator.h

#include <iostream>

using namespace std;

class CalculatorClass{

public:
    //float r1,i1,r2,i2;

    void SumComplex();
    void DifComplex();
    void MultComplex();
    void DivComplex();
};

<强> calculator.cpp：

#include "calculator.h"
void CalculatorClass::SumComplex() {  //add complex numbers

        float sumRe,sumIm;
        float r1,i1,r2,i2;

        cout << "Enter 2 complex numbers: " << endl;
        cin >> r1 >> i1 >> r2 >> i2;  //read nimber
//sum of real and imanige part of number
        sumRe = r1 + r2;
        sumIm = i1 + i2;
        if(sumIm < 0) {
            cout << "Sum is " << sumRe << sumIm << "j" << endl;
        }
        else {
            cout << "Sum is " << sumRe << "+" << sumIm << "j" << endl;
        }
    }

<强> main.cpp中：

#include "calculator.h"

using namespace std;

int main() {

    int choise;
    char op;

    CalculatorClass CalculatorObject;  //i call class

    do {    /* Elenxos gia swsti eisagwgi epilogis */

        cout << "For complex numbers press 1,for normal numbers press 2!" << endl;
        cin >> choise;

    } while(choise != 1 && choise != 2);


    do { /* Elenxos gia swsti eisagwgi telesti */

        cout << "Choose operator:" << endl;
        cin >> op;

    } while(op != '+' && op != '-' && op != '*' && op != '/');


    if(choise == 1)
    {       //if is '+' i calculate

            if(op == '+') {
                CalculatorObject.SumComplex();
            }


    }
    else{
        if(op == '+')
            cout<<"Sum Operation"<<endl;
        else
            cout<<"Something Else"<<endl;
    }


    return 0;
}

在Mac终端上进行测试：

g++ main.cpp calculator.cpp
./a.out

它按预期工作。

我希望，这会有所帮助。

Answer 3

您的程序错过了'public：'关键字。如果您不包括私人或公共，那么您班级中的所有内容都将被视为私人。只需添加一个公共：在你的功能面前

与关键字＆＃39;私人＆＃39;相关的错误

3 个答案: