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C help calculate grand total

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Join Date: May 2005

Posts: 3

Reputation: dejaz is an unknown quantity at this point

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dejaz

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C help calculate grand total

May 20th, 2005

hi guys,

i am stuck... we have to show wats in a file.... then at the end show the grand total of the Profits .. heres the report func....

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
void report()
{
	struct Prods ssg;
 
	double prof;
 
	FILE *f;
	f = fopen("data.dat","rb");
 
		printf("\n\n\n==============================================================================\n");
		printf("Prod#   Type   Description	    Qty      Cost        Price        Profit\n");
		printf("==============================================================================\n");
 
	while(fread(&ssg,sizeof(ssg),1,f))
	{
 
		printf("\n%-9d%-7d%-21.18s%-2d%13.2lf%13.2lf%13.2lf\n", 
						ssg.prodnum, ssg.prodt, ssg.desc, ssg.prodquan, ssg.prodcost, ssg.prodprice, profits(ssg.prodprice, ssg.prodcost, ssg.prodquan));
 
 
	}
		printf("\n==============================================================================\n");
 
		//print grand total of PROFIT
 
		printf("%d",prof);
 
	fclose(f);
 
}
void report()
{
	struct Prods ssg;
	
	double prof;
	
	FILE *f;
	f = fopen("data.dat","rb");

		printf("\n\n\n==============================================================================\n");
		printf("Prod#   Type   Description	    Qty      Cost        Price        Profit\n");
		printf("==============================================================================\n");

	while(fread(&ssg,sizeof(ssg),1,f))
	{

		printf("\n%-9d%-7d%-21.18s%-2d%13.2lf%13.2lf%13.2lf\n", 
						ssg.prodnum, ssg.prodt, ssg.desc, ssg.prodquan, ssg.prodcost, ssg.prodprice, profits(ssg.prodprice, ssg.prodcost, ssg.prodquan));

	
	}
		printf("\n==============================================================================\n");

		//print grand total of PROFIT

		printf("%d",prof);

	fclose(f);

}

<< moderator edit: added [code][/code] tags >>

thx...

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Join Date: May 2005

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Reputation: Dogtree is an unknown quantity at this point

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Dogtree

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Posting Whiz in Training

Re: C help calculate grand total

May 20th, 2005

How does that function not work? There are a few iffy parts, like not checking fopen for success and not considering that fread can return a non-zero failure code, but there are no obvious errors that I can see this early in the morning.

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Join Date: May 2005

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Reputation: dejaz is an unknown quantity at this point

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dejaz

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Re: C help calculate grand total

May 20th, 2005

thx Dogtree for the reply.... i'll fix the probs u mentioned... func i mentioned works and displays everything .... but the main concern is that i have to add all the profits and at the end show the grand total of the profits... and i dont know how to do that....

thx...

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Join Date: Apr 2004

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Reputation: Dave Sinkula has a brilliant future

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Dave Sinkula Dave Sinkula is offline

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long time no c

Re: C help calculate grand total

May 20th, 2005

I'd imagine something like...

Help with Code Tags

(Toggle Plain Text)

double prof = 0;
// ...
while(/*...*/)
{
   double p = profits(ssg.prodprice, ssg.prodcost, ssg.prodquan);
   // ...
   prof += p;
}

"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand

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Join Date: May 2005

Posts: 3

Reputation: dejaz is an unknown quantity at this point

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dejaz

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Re: C help calculate grand total

May 20th, 2005

•

Originally Posted by Dave Sinkula

I'd imagine something like...
Help with Code Tags

(Toggle Plain Text)
double prof = 0;
// ...
while(/*...*/)
{
   double p = profits(ssg.prodprice, ssg.prodcost, ssg.prodquan);
   // ...
   prof += p;
}
double prof = 0; // ... while(/*...*/) { double p = profits(ssg.prodprice, ssg.prodcost, ssg.prodquan); // ... prof += p; }