Thread: sscanf for a string from a file

Code:

sscanf(line, "%31s,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f", &Initial_Guess[z].ImageName, &Initial_Guess[z].x1, ... (etc....)

& is not needed here. Question 12.12b
I didn't see any problem here. You should check return value of sscanf(). (read doc)
Edit, the problem is coz of %31s. sscanf will read 31 characters as string.

You know I read that in one of the manuals, but couldn't get the syntax right... I actually can use:

Code:

sscanf(line, "%[^,] %f,%f,...

and not need the 31... but that still gets me back to where I started, a good parsing of the image name, but not the numbers.

I wonder if I am debugging this the wrong way...

Here is the line from the csv file:

00000_00000000243648463966.tiff,21.85,-0.45,5.5,2,38.5,0.4,0,0,0,0,0,0

Code:

printf("%s",line);

gives me the exact line back

Code:

printf("%s", Initial_Guess[z].ImageName);

gives me: 00000_00000000243648463966.tiff

and if I parse it using the line2 option...

Code:

printf("%s\n",line2);

I get:
21.85,-0.45,5.5,2,38.5,0.4,0,0,0,0,0,0

If I then parse line2 and then try

Code:

printf("%f\n",  &Initial_Guess[z].x1);

I get: 0.000000

Can't see right off what I could be messing up, but obviously something.

Yep, it sure was the debugging (Doh!)... no need for the "&" in printf!! Thanks for the [^,] I will have to use that again in the future...

Amazing how much long days, affect the little stuff.

Thanks for the help!

Here is the working code for all:

Code:

int z =0;
const char name[]="tiff.csv";	//Look in specified folder for tiff.csv
char *csvfilename=NULL;
csvfilename = (CHAR*)malloc(strlen(dir_images)+strlen(name));  // dir_images is a string with the directory of the images
strcpy(csvfilename,dir_images);
strcat(csvfilename,name);
char line [ 280 ];
FILE *fp;
	fp= fopen(csvfilename,"r");
	fgets(line, sizeof line, fp); //bypass first header line
	while ( z<i)
	{
		fgets(line, sizeof line, fp);
		sscanf(line, "%[^,],%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f", &Initial_Guess[z].ImageName, &Initial_Guess[z].x1,
	                        &Initial_Guess[z].y1, &Initial_Guess[z].z1, &Initial_Guess[z].roll1, &Initial_Guess[z].pitch1, &Initial_Guess[z].yaw1,
				&Initial_Guess[z].x2, &Initial_Guess[z].y2, &Initial_Guess[z].z2, &Initial_Guess[z].roll2,
				&Initial_Guess[z].pitch2, &Initial_Guess[z].yaw2);
                z++;
	}
	z=0;
	printf("%f %f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n", Initial_Guess[z].x1,
					Initial_Guess[z].y1, Initial_Guess[z].z1, Initial_Guess[z].roll1, Initial_Guess[z].pitch1, Initial_Guess[z].yaw1,
					Initial_Guess[z].x2, Initial_Guess[z].y2, Initial_Guess[z].z2, Initial_Guess[z].roll2,
					Initial_Guess[z].pitch2, Initial_Guess[z].yaw2);  // Show me the first one for error checking
	fclose(fp);
	free(csvfilename);