Question

来自Java / Eclipse世界，只想了解C ++并使用Code :: Blocks。

正在制作一个基础课程，并且无法将其实施到我的主文件中。

将“未定义的引用'Time :: Time（int，int，int）'”和未定义的引用错误添加到我的main.cpp文件中使用的所有方法中。

尝试重建，尝试将文件重新添加到控制台项目中。不确定是什么问题。我对Code :: Blocks相当生疏，所以也许它显而易见，任何帮助都会受到赞赏。

的main.cpp

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

using namespace std;

int main()
{
    //Time current();
    Time current(12,0,0);

    cout << "Current time." << endl;
    current.displayTime();

    cout << "\nSet time to 22:29:30." << endl;
    current.setTime(22,29,30);
    current.displayTime();

    cout << "\nAdd 45 minutes." << endl;
    current.addMinutes(45);
    current.displayTime();

    cout << "\nAdd 45 seconds." << endl;
    current.addSeconds(45);
    current.displayTime();

    cout << "\nAdd 1 hour." << endl;
    current.addHours(1);
    current.displayTime();

    return 0;
}

time.h中

#ifndef TIME_H
#define TIME_H

class Time
{
    public:
        Time(int h, int m, int s);
        Time(int h, int m);
        Time(int h);
        Time();

        virtual ~Time();

        void setTime(int h, int m, int s);
        void setTime(int h, int m);
        void setTime(int h);

        void addHours(int h);
        void addMinutes(int m);
        void addSeconds(int s);

        void displayTime();

        int getHours();
        void setHours(int h);
        int getMinutes();
        void setMinutes(int m);
        int getSeconds();
        void setSeconds(int s);

    protected:

    private:
        int hours;
        int minutes;
        int seconds;
};

#endif // TIME_H

Time.cpp

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

using namespace std;

Time::Time(int h, int m, int s)
{
    hours = h;
    minutes = m;
    seconds = s;
}

Time::Time(int h, int m)
{
    hours = h;
    minutes = m;
    seconds = 0;
}

Time::Time(int h)
{
    hours = h;
    minutes = 0;
    seconds = 0;
}

Time::Time()
{
    hours = 0;
    minutes = 0;
    seconds = 0;
}

Time::~Time()
{
    //dtor
}

Time::void setTime(int h, int m, int s)
{
    hours = h;
    minutes = m;
    seconds = s;
}

Time::void setTime(int h, int m)
{
    hours = h;
    minutes = m;
    seconds = 0;
}

Time::void setTime(int h)
{
    hours = h;
    minutes = 0;
    seconds = 0;
}

Time::void addHours(int h)
{
    hours += h;

    if (hours > 23)
    {
        hours -= 24;
    }
}

Time::void addMinutes(int m)
{
    minutes += m;

    if (minutes > 59)
    {
        addHours(minutes / 60);
        minutes %= 60;
    }
}

Time::void addSeconds(int s)
{
    seconds += s;

    if (seconds > 59)
    {
        addMinutes(seconds / 60);
        seconds %= 60;
    }
}

Time::void displayTime()
{
    if (hours < 10)
    {
        cout << "0" << hours;
    }
    else
    {
        cout << hours;
    }

    cout << ":";

    if (minutes < 10)
    {
        cout << "0" << minutes;
    }
    else
    {
        cout << minutes;
    }

    cout << ":";

    if (seconds < 10)
    {
        cout << "0" << seconds;
    }
    else
    {
        cout << seconds;
    }

    cout << endl;
}

Time::void setHours(int h)
{
    if (h >= 0 && h <= 23)
    {
        hours = h;
    }
    else
    {
        cout << "Invalid input!\n";
    }
}

Time::int getHours()
{
    return hours;
}

Time::void setMinutes(int m)
{
    if (m >= 0 && m <= 59)
    {
        minutes = m;
    }
    else
    {
        cout << "Invalid input!\n";
    }
}

Time::int getMinutes()
{
    return minutes;
}

Time::void setSeconds(int s)
{
    if (s >= 0 && s <= 59)
    {
        seconds = s;
    }
    else
    {
        cout << "Invald input!\n";
    }
}

Time::int getSeconds()
{
    return seconds;
}

Answer 1

类名在方法名之前，而不是在返回类型之前。

所以而不是像。

Time::void setTime(int h)
{
    hours = h;
    minutes = 0;
    seconds = 0;
}

应该是

void Time::setTime(int h)
{
    hours = h;
    minutes = 0;
    seconds = 0;
}

Time.cpp由于错误而无法编译，然后链接器找不到任何符号。

使用Code :: Blocks对类方法的未定义引用

1 个答案: