Converting Strings To Integer In Linked List

Vishy80 · #1 05-Jun-2005, 04:56

Does anybody know how I could get a string value from a file convert it to integer so I can do calculations and stuff, any help will be greatly appreicated

This is the code I got so far

CPP / C++ / C Code:

temp_totalprice1=atoi(Stock.RetailPrice);
temp_quantitysold1=atoi(temp_quantitysold);
temp_totalprice1=temp_totalprice1*temp_quantitysold;

On the above code it doesn't assign the value of (Stock.RetailPrice) to temp_totalprice

dsmith · #2 05-Jun-2005, 07:19

Quote:

Originally Posted by Vishy80

Does anybody know how I could get a string value from a file convert it to integer so I can do calculations and stuff, any help will be greatly appreicated

This is the code I got so far

CPP / C++ / C Code:

temp_totalprice1=atoi(Stock.RetailPrice);
temp_quantitysold1=atoi(temp_quantitysold);
temp_totalprice1=temp_totalprice1*temp_quantitysold;

On the above code it doesn't assign the value of (Stock.RetailPrice) to temp_totalprice

Hi Vishy80 and welcome to GIDForums™. How do you know that the value is not assigned? Are you using some quick printfs to see what the output is? Also, it appears to me that Stock.RetailPrice may want to be represented as a float and not an int, in which case the use of atof is needed.

Anyway, if you can give us a bit more info on this, we may be of more help.

Cheers,
d

Vishy80 · #3 05-Jun-2005, 22:12

Hi There
I actually did try the printf statement and it didn't return any value, anyways this is the rest of the code for that function

CPP / C++ / C Code:

 
void ProcessSales()
{
        char temp_quantitysold[5];
        char temp_totalprice[8];
        char temp_stock[8];
        char temp_reorderflag[2];
        int temp_totalprice1;
        int temp_quantitysold1;
        puts("\nEnter Stock Code\n");
	gets(SearchedStockCode);
	OpenStockFile();
        if(SearchStock())
	{
		puts("\nEnter Quantity Sold\n");
	        gets(temp_quantitysold);
                if (strcmp(temp_quantitysold,Stock.StockLevel)>0)
                {
                        puts("\nEnter Quantity Sold Is Incorrect\n");
                        return;
                }
                else
                {       temp_totalprice1=atoi(Stock.RetailPrice);
                        temp_quantitysold1=atoi(temp_quantitysold);
                        //temp_totalprice1=temp_totalprice1*temp_quantitysold;
                        puts("\nStock Code");
	                puts(Stock.StockCode);
	                puts("\nStock Description");
	                puts(Stock.StockDescription);
                        puts("\nQuantiy Sold");
                        puts(temp_quantitysold);
	                puts("\nTotal Price");
                        puts(temp_totalprice);
                        //gets(Stock.StockLevel);
                        if (strcmp(Stock.StockLevel,temp_quantitysold)>0)
                        {
                             strcpy(Stock.StockLevel, temp_quantitysold);
                             if (strcmp(Stock.ReorderLevel,Stock.StockLevel)>0)
                             {
                                if ((Stock.ReorderFlag)>0)
                                {
                                        temp_reorderflag=="Y";
                                        strcpy(Stock.ReorderFlag, temp_reorderflag);
                                }
                             }
                        }
                }
	}
	else
	{
		printf("Entered Stock Code Does Not Exist");
                CloseStockFile();
                fflush(stdin);
		return;
	}

}

When I initally save the stock file filed I do save it as a integer file rather than float
Cheers
Vish

aleppos · #4 06-Jun-2005, 04:14

hi,

maybe this code help you:

CPP / C++ / C Code:

bool string2int(char* digit, int& result) {
	if (digit == NULL) result = 0;
	else {
		result = 0;
		int minus = 0;
		while ((*digit >= '0' && *digit <='9') || *digit == '-') {
			if (*digit == '-') minus = 1;
			else result = (result * 10) + (*digit - '0');
			digit++;
		}
		if (minus == 1) result = result*(-1);
   		//--- Check that there were no non-digits at end.
		if (*digit != 0) {
			return false;
		}
	}
	return true;
}

int string2int(char* digit) {
	int result = 0;
	if (digit == NULL) result = 0;
	else{
		int minus = 0;
		while ((*digit >= '0' && *digit <='9') || *digit == '-') {
			if (*digit == '-') minus = 1;
			else result = (result * 10) + (*digit - '0');
			digit++;
		}
		if (minus == 1) result = result*(-1);
	//--- Check that there were no non-digits at end.
		if (*digit != 0) {
			return 0;
		}
	}
	return result;
}

I'm sorry if my information is incorrect/useless, I'm just trying to help :-) .
Good Luck - aLeppos

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