Error Handling

here is some codes:

Code:

#include&ltiostream&gt
using namespace std;

int main(int argc,char *argv[]){
	int ReturnCode=0;

	float Dividend=0;
	cout&lt&lt"Dividend:";
	cin&gt&gtDividend;
	if(!cin.fail()){
		float Divisor=1;
		cout&lt&lt"Divisor:";
		cin&gt&gtDivisor;

		float Result=(Dividend/Divisor);
		cout&lt&ltResult&lt&ltendl;
	}
	else{
		cerr&lt&lt"Input Error,not a number"&lt&ltendl;
		cin.clear();
		char BadInput[80];
		cin&gt&gtBadInput;
		ReturnCode=1;
	}
		char StopCharacter;
		cout&lt&ltendl&lt&lt"Press a key and \"Enter\":";
		cin&gt&gtStopCharacter;
		
		return ReturnCode;

}

Why do I need these variables:ReturnCode,BadInput[80],StopCharacter?
pls suggest.

thanks,
Gunjan

 

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ReturnCode is for telling the caller what error the program has encountered. The return code is usually used by a script or batch file.

BadInput[80] is a dummy buffer that trys to eat all the bad characters in the input stream. It will fail if the last input was more than 80 characters in a line.

StopCharacter is a dummy variable that trys to eat the "any key". It's a way to pause the output until user press a key then enter. Useful for displaying the result until user decides it's time to move on.

 

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