c – 调试器跳过整个if语句

/**
 * Copies a BMP piece by piece,just because.
 * All we have to do is change all the red pixels to 


 */

#include <stdio.h>
#include <stdlib.h>

#include "bmp.h"

int main(int argc,char *argv[])
{
    // ensure proper usage
    if (argc != 3)
    {
        fprintf(stderr,"Usage: ./copy infile outfilen");
        return 1;
    }

    // remember filenames
    char *infile = argv[1];
    char *outfile = argv[2];

    // open input file 
    FILE *inptr = fopen(infile,"r");
    if (inptr == NULL)
    {
        fprintf(stderr,"Could not open %s.n",infile);
        return 2;
    }

    // open output file
    FILE *outptr = fopen(outfile,"w");
    if (outptr == NULL)
    {
        fclose(inptr);
        fprintf(stderr,"Could not create %s.n",outfile);
        return 3;
    }

    // read infile's BITMAPFILEHEADER
    BITMAPFILEHEADER bf;
    fread(&bf,sizeof(BITMAPFILEHEADER),1,inptr);

    // read infile's BITMAPINFOHEADER
    BITMAPINFOHEADER bi;
    fread(&bi,sizeof(BITMAPINFOHEADER),inptr);

    // ensure infile is (likely) a 24-bit uncompressed BMP 4.0
    if (bf.bfType != 0x4d42 || bf.bfOffBits != 54 || bi.biSize != 40 || 
        bi.biBitCount != 24 || bi.biCompression != 0)
    {
        fclose(outptr);
        fclose(inptr);
        fprintf(stderr,"Unsupported file format.n");
        return 4;
    }

    // write outfile's BITMAPFILEHEADER
    fwrite(&bf,outptr);

    // write outfile's BITMAPINFOHEADER
    fwrite(&bi,outptr);

    // determine padding for scanlines
    int padding =  (4 - (bi.biWidth * sizeof(RGBTRIPLE)) % 4) % 4;

    // iterate over infile's scanlines
    for (int i = 0,biHeight = abs(bi.biHeight); i < biHeight; i++)
    {
        // iterate over pixels in scanline
        for (int j = 0; j < bi.biWidth; j++)
        {
            // temporary storage
            RGBTRIPLE triple;

            // read RGB triple from infile
            fread(&triple,sizeof(RGBTRIPLE),inptr);

            RGBTRIPLE red = {0,255};
            int same = 0; 
            RGBTRIPLE white = {255,255,255};

            if(&red.rgbtRed == &triple.rgbtRed && &red.rgbtGreen != &triple.rgbtRed && &red.rgbtBlue != &triple.rgbtRed)
            {
                same = 1; 
            }

            if(same == 0) //copy the pixel,if the pixel isn't red
            {
                // write RGB triple to outfile
                fwrite(&triple,outptr);    
            }
            if(same == 1)
            {
                fwrite(&white,outptr);
            }

        }

        // skip over padding,if any
        fseek(inptr,padding,SEEK_CUR);

        // then add it back (to demonstrate how)
        for (int k = 0; k < padding; k++)
        {
            fputc(0x00,outptr);
        }
    }

    // close infile
    fclose(inptr);

    // close outfile
    fclose(outptr);

    // success
    return 0;
}

我的问题更具体地说是这段代码：

// temporary storage
            RGBTRIPLE triple;

            // read RGB triple from infile
            fread(&triple,outptr);
            }

我试图将bmp文件复制到另一个文件,但摆脱任何红色并用白色替换它(大部分代码不是我的工作,我应该为编辑编写的预编写代码),副本功能有效,但由于某种原因检测到红色并用白色替换它不起作用.奇怪的是,当我使用调试器时,它完全跳过了这部分代码：

if(&red.rgbtRed == &triple.rgbtRed && &red.rgbtGreen != &triple.rgbtRed && &red.rgbtBlue != &triple.rgbtRed)
        {
            same = 1; 
        }

这是我检测像素是否为红色的地方,调试器的作用就好像该行不存在一样.