If statement is been passed over-Simple Opencv project

This is a discussion on If statement is been passed over-Simple Opencv project within the C++ Programming forums, part of the General Programming Boards category; I cant seem to hit these if statements my code seems to pass over them without altering the values I ...

  1. #1
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    If statement is been passed over-Simple Opencv project

    I cant seem to hit these if statements my code seems to pass over them without altering the values I want. I cant seem to find the problem and the debugger wont hit them either as I run through the code.
    Im on windows 7 using visual studio 2010 if that helps.
    This is an openCV project to reconstruct an image based on a text file of 1s and 0s.
    Code:
    // reconstruction1.cpp : Defines the entry point for the console //application.
    //
    
    #include "stdafx.h"
    #include <stdio.h>
    #include <iostream>
    #include <cv.h>
    #include <cxcore.h>
    #include <highgui.h>
    #include <math.h>
    #include "cv.h"
    #include "highgui.h"
    #include "stdio.h"
    #include <fstream>
    using namespace std;
    
    
    
    int main ()
    {
    	//create a reconstruction function to take my output files,so far of 1 //and 0s and build an edge map
    
    
    	ifstream myfile;
    	myfile.open("me.txt");
    	int height=145,width=138;
    	//size of myimage
    	CvSize	a=cvSize(200,200);
    	//create my image for out put
    	IplImage* img=cvCreateImage(a,IPL_DEPTH_32F,4);
    	//create pixel
    	CvScalar pix;
    	int c,c2;
    
    	//makesure its open
    	if (myfile.is_open())
    	{
    	
    	cout<<"ok";
    
    	//create loop and count varibles
    	int c1,b1=0,w=0;
    	//start loop
    	while(w<=20010)
    	{
    		//this loops through every pixel starting at height width(h,w)
    		for(b1;b1<=height-1;b1++)
    		{
    		 for(c1=0;c1<=width-1;c1++)
    		 {
    			 //get next charecter in file, it will be either 1 or 0
    		c=myfile.get();
    		c2=c;
    		 //change color of pixel depending on c
                                     // thse are the if statements that arent been checked
    		 if(c2==49)
    		 {
    			 pix.val[0]==255;
    			  pix.val[1]==0;
    			  pix.val[2]==0;
    			
    		 }
    		 
    		 if(c2==48)
    		 {
    			 pix.val[0]==0;
    			 pix.val[1]==255;
    			 pix.val[2]==0;
    			 
    		 }
    		 //set pixel
    		
    		cvSet2D(img,b1,c1,pix);
    		w++;
    		cout<<w<<"\n";
    		 }
    
    		 }//close 1st for loop
    			myfile.close();
    			cout<<"\n closed";
    			cvShowImage("go",img);
    			cvWaitKey(0);
    			cvReleaseImage(&img );
    			system("pause");
    	 }
    	}
    	return 0;
    }

  2. #2
    and the hat of wrongness Salem's Avatar
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    > pix.val[0]==255;
    Do you get a "statement has no effect" warning?

    Try bumping up the warning level in the compiler.

    You want =, not ==
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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