C / C++ / MFC

1. The performance penalty is usually only incurred when an exception actually is thrown (which is assumed to be rare). The overhead of having a try/catch block is usually negligible (between 3 and less than 10 asm instructions).
   
2. Exceptions can improve performance and code size in cases where a lot of error codes have to be checked:

   // without exceptions
   if(foo1(...)!=OK){
   ...
   }
   if(foo2(...)!=OK){
   ...
   }
   ...
   if(foon(...)!=OK){
   ...
   }
   // with exceptions
   try{
     foo1(...);
     foo2(...);
     ...
     foon(...);
   }
   catch(...){
     ...
   }

   
   
3. Exceptions are sometimes the only reasonable way to go (eg. when a ctor fails).
   
4. Exceptions integrate seamlessly with the RAII (Resource Acquisition Is Initialization) idiom. They help support invariants in your classes.
   
5. They can help you simplify the signatures of your functions: instead of

   BOOL getWhatever(int &whatever);

   or

   int getWhatever(); // -1 if it fails

   you can write

   int getWhatever(); // throws couldnt_do_it if it fails

if(printf("hey") < NULL)
  AfxMessageBox("Error");

right.ModifyStyle(LVS_LIST | LVS_ICON | LVS_SMALLICON, LVS_REPORT, 0);

right.ModifyStyle(LVS_TYPEMASK, LVS_REPORT, 0);

    char ch;
	do
	{  cin>> ch;
  			//Here I check the first Letter of The Input
			//And Do whatever is necessary to process it
   			switch (ch)
			{
				//***********************************************************************************
				case 'C':
				{
                    cin>>tempST>>tempIV;
                    tempStock->setStockTicker(tempST);
                    int low =0, mid,  high=14;
		    		while (low <= high)
					{
						mid = (low + high)/2;
      		     		(*tempStock) = tempStocks->getStock(mid);
                        tempStock->setcurStockPrice(tempIV);
    					if (strcmp(tempStock->getStockTicker(),inputLine ) < 0)
						low = mid + 1;
						else if (strcmp(tempStock->getStockTicker(),inputLine ) > 0)
						high= mid - 1;
						else
						mid = mid;						
                    
					}
      
				}break;

				//***********************************************************************************
                case 'B':
				{
					count = 0;
				    while((c = cin.get()) != ' ')
					{
						inputLine[count] = c;
		                count++;
					}
			        inputLine[count] = '\0'; //input line is storing the SS# here
					count = 0;   

					//Here starts my binary search again
                    int tempAccount;
				    int low =0, mid,  high=14; 
		    		while (low <= high)
					{
						mid = (low + high)/2;
						// here i create a temporary investor to hold data of Buyer
			     		Investor tempInvestor = (*tempInvestors).getInvestor(mid);
                        tempAccount = tempInvestor.getAccountBalance(); //AccountBalance Of Buyer
    					if (strcmp(tempInvestor.getSocialSecurity(),inputLine ) < 0)
						low = mid + 1;
						else if (strcmp(tempInvestor.getSocialSecurity(),inputLine ) > 0)
						high= mid - 1;
						else
					    mid = mid;
					}
														
				    while((c = cin.get()) != ' ')
					{
						inputLine[count] = c;
		                count++;
					}
			        inputLine[count] = '\0'; 
			        count = 0; 
							
                    char tempTicker[30];
					strcpy(tempTicker,inputLine); // now tempTicker stores the tickerSymbol

                    // Here i'm performing another binary search to look for the 
					// specific stock that has that same stockTicker
					int lo =0, mi,  hi=14; 
					int tempStockPrice;
		    		while (lo <= hi)
					{
						mi = (lo + hi)/2;
			            *tempStock = (*tempStocks).getStock(mi);
                        tempStockPrice = (*tempStock).getCurStockPrice(); // storing the stockprice in tempStockPrice
                		if (strcmp((*tempStock).getStockTicker(),inputLine ) < 0)
					    lo = mi + 1;
					    else if (strcmp((*tempStock).getStockTicker(),inputLine ) > 0)
					    hi = mi - 1;
						else
						mi = mi;	                   
					}
							

					while((c = cin.get()) != '\n ')
					{
						inputLine[count] = c;
		                count++;
					}
			        inputLine[count] = '\0'; 
			        count = 0; 
					int tempNumShares = atoi (inputLine);  //tempInt is storing number of shares now.
					//LATER;;;;;;;;;;;;IF YOU HAVE ANY PROBLEM WITH THE VALUES OF TEMPSTOCKPRICE AND TEMPNUMSHARES LOOK FOR ANOTHER WAY TO DECLARE THOSE TWO VARIABLES OUT OF THE LOOP.
					if ( tempAccount >= (tempStockPrice * tempNumShares)) 
					{
					    (*tempTickerShare).setNumOfShares(tempNumShares);	
						(*tempTickerShare).setTickerSymbol(tempTicker);
						(*tempInvestor).addTickerShare(tempTickerShare);
					}
					

				}break;

				//***********************************************************************************
                case 'S':
				{
					while((c = cin.get()) != ' ')
					{
						inputLine[count] = c;
		                count++;
					}
			        inputLine[count] = '\0'; //input line is storing the SS# here
					count = 0;   

					//Here starts my binary search again
                    int low =0, mid,  high=14; 
		    		while (low <= high)
					{
						mid = (low + high)/2;
						// here i create a temporary investor to hold data of Seller
			     		Investor tempInvestor = (*tempInvestors).getInvestor(mid);
                        if (strcmp((tempInvestor).getSocialSecurity(),inputLine ) < 0)
						low = mid + 1;
						else if (strcmp((tempInvestor).getSocialSecurity(),inputLine ) > 0)
						high= mid - 1;
						else
					    mid = mid;
					}

					while((c = cin.get()) != ' ')
					{
						inputLine[count] = c;
		                count++;
					}
			        inputLine[count] = '\0'; 
			        count = 0; 
							
                    char tempTicker[30];
					strcpy(tempTicker,inputLine); // now tempTicker stores the tickerSymbol
                    int lo =0, mi,  hi=14;
					while (lo <= hi)
					{
						mi = (lo + hi)/2;
			            tempTickerShare = (*tempInvestor).getTickerShare(mi);
						strcpy (tempTicker , (*tempTickerShare).getTickerSymbol());
                        if (strcmp(tempTicker,inputLine ) < 0)
					    lo = mi + 1;
					    else if (strcmp(tempTicker,inputLine ) > 0)
					    hi = mi - 1;
						else
						mi = mi;	                   
					}

					while((c = cin.get()) != '\n')
					{
						inputLine[count] = c;
		                count++;
					}
			        inputLine[count] = '\0'; 
			        count = 0; 
					int tempNumShares = atoi (inputLine);  
					
					//Here i check whether the investor has enough shares to sell
					if (tempNumShares <= (*tempTickerShare).getNumOfShares()) 
					{
						tempNumShares = (*tempTickerShare).getNumOfShares() - tempNumShares;
						(*tempTickerShare).setNumOfShares(tempNumShares);
					}
					else
						cout<< "Sorry don't have enough shares to sell"<<endl;
 
="" }break;
="" }

="" }
="" while="" (!cin.eof());
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