Question

因此，尽管有人可以帮助我，但我正确地调用了该类，但我仍然收到此错误。

void PPM::sepiaFilter( PPM& dst ) const {

    dst.setWidth( this->getWidth( ) );

    dst.setHeight( this->getHeight( ) );

    dst.setMaxColorValue( this->getMaxColorValue( ) );

    double red = 0;

    double green = 0;

    double blue = 0;

    for ( int y = 0; y <= this->getHeight( ); y++ ) {

        for ( int x = 0; x <= this->getWidth( ); x++ ) {

            red = this->getChannel( y, x, 0 );

            green = this->getChannel( y, x, 1 );

            blue = this->getChannel( y, x, 2 );

            double new_red = 0.393 * red + 0.769 * green + 0.189 * blue;

            double new_green = 0.349 * red + 0.686 * green + 0.168 * blue;

            double new_blue = 0.272 * red + 0.534 * green + 0.131 * blue;

            if ( new_red > this->getMaxColorValue( ) ) {

                dst.setChannel( y, x, 0, this->getMaxColorValue( ) );

            }

            if ( new_green > this->getMaxColorValue( ) ) {

                dst.setChannel( y, x, 1, this->getMaxColorValue( ) );

            }

            if ( new_blue > this->getMaxColorValue( ) ) {

                dst.setChannel( y, x, 2, this->getMaxColorValue( ) );

            }

            dst.setChannel( y, x, 0, int ( new_red ) );

            dst.setChannel( y, x, 1, int ( new_green ) );

            dst.setChannel( y, x, 2, int ( new_blue ) );

        }

    }

}

即使一切正常，我仍然会收到此错误，无论我做什么。我做了很多更改，以使它不会引发错误，而我只会继续引发相同的错误。如果有人可以帮助我找到情况，那么我可以继续生活。

这是我的.h文件。

#ifndef _PPM_H_
#define _PPM_H_


#include <iostream>
#include <string>
#include <fstream>
#include <vector>
#include <cstdlib>
#include <cmath>
#include <algorithm>


class PPM {


public:

    PPM( );

    int getWidth( ) const;

    int getHeight( ) const;

    int getMaxColorValue( ) const;

    int getChannel( const int& row, const int& column, const int& channel ) const;

    void setWidth( const int& width );

    void setHeight( const int& height );

    void setMaxColorValue( const int& max_color_value );

    void setChannel( const int& row, const int& column, const int& channel, const int& value );

    int getting_width;

    int rhs_width;

    int rhs;

    int lhs;

    bool operator<(const PPM& rhs);

    bool operator>(const PPM& rhs);

    bool operator==(const PPM& rhs);

    bool operator<=(const PPM& rhs);

    bool operator>=(const PPM& rhs);

    bool operator!=(const PPM& rhs);

    PPM operator+=(const PPM& rhs);

    PPM operator-=(const PPM& rhs);

    PPM operator+(const PPM& rhs) const;

    PPM operator-(const PPM& rhs) const;

    PPM operator*(const PPM& rhs) const;

    PPM operator*=(double d);

    PPM operator/=(double d);

    PPM operator*(double d) const;

    PPM operator/(double d) const;

    void sepiaFilter( PPM& dst ) const;


private:

    int mWidth;

    int mHeight;

    int mMAX_COLOR;

    int mRow;

    int mColumn;

    int mChannel;

    std::vector < int > Pixel;

};

std::ostream& operator << (std::ostream& output, const PPM& Pic_out);

std::istream& operator >> (std::istream &input, PPM& Pic_in);

#endif /* _PPM_H_ */

Answer 1

在类中实现构造函数后，您必须在.h或cpp文件中都需要一个正文

对`PPM :: PPM（）的未定义引用找不到我为什么收到此错误的原因

1 个答案: