Native Development

[TheDevil]

Hi,

Using the example at http://developer.blackberry.com/native/documentation/playbook/com.qnx.doc.native_sdk.devguide/com.qn...

Im trying to save data in a file for my game. My code is as follows:

std::string path1 = CCFileUtils::sharedFileUtils()->getWriteablePath();
	path1.append("save.dat");
	FILE *fp = fopen(path1.c_str(), "wb");
	CCLog("path is %s",path1.c_str());

	     if (!fp) {
	    	 CCLog("error!!!!!");
	     }
	     else
	     {
	    	 int page;
	    	 int firstRead = fscanf(fp, "%i", &page);
	    	 CCLog("file read value is %d %d",firstRead,page);
	    	 if(firstRead == -1)
	    	 {
	    		 fprintf(fp,"%i",globalVolume);
	    		 fprintf(fp,"%i",globalLevel);
	    		 fprintf(fp,"%i",_timeAttack);
	    		 fprintf(fp,"%i",_maxStreak);
	    		 for(int i = 0;i < 30; i++)
	    		 {
	    			 fprintf(fp,"%i",((CCString *)_score->objectAtIndex(i))->intValue());
	    		 }
	     }
	     }

//	     fprintf(fp, "%i", page);

	     fclose(fp);

	     fp = fopen(path1.c_str(), "wb");

	     if (!fp) {
	    	 CCLog("error!!!!!");
	     }
	     else
	     {
	    	 int page;
	    	 	    	 int firstRead = fscanf(fp, "%i", &page);
	    	 	    	 CCLog("file read value is %d %d",firstRead,page);
	     }
	     fclose(fp);

The ouput that I get is :

path is /accounts/1000/appdata/org.cocos2dx.Test.testDev__Test2c5a53de/data/save.dat

cocos2d-x debug info file read value is -1 -1323428880

read value is -1 -1323428880

read value is -1 -1323428880.

I am testing this on the simulator. Is there anything wrong with what Im doing? Does file saving work on the simulator?

Thanks.

[TheDevil]

Just checked on the Device. Does not work there too. The output i get is :

cocos2d-x debug info path is /accounts/1000/appdata/org.cocos2dx.Test.testDev__Test2c5a53de/data/save.dat

cocos2d-x debug info file read value is -1 136197336

cocos2d-x debug info file read value is -1 136197336

[TobyKaos · Accepted solution]

I use fwrite instead of fprintf and all is ok for me

[TheDevil]

Everything else is the same in ur code?will check this as soon as I have access to a system.

[TobyKaos]

you do not modify page value when firstRead return -1 at the first time

[TheDevil]

How do I know if it's the first time that the file is being written?

[TobyKaos]

Try to open it in read mode "rb". if file descriptor is null then open it in wb

[TheDevil]

Thanks! Using fwrite and fread did the trick for me! 

[TobyKaos]

Great