Programming Forums > Application Development > C

Navid · May 21st, 2005, 7:12 PM

#include <stdio.h>

float tax = .15;
int price;

int main(void)
{
printf("What is the Cost?");
scanf("%d", &price);

#define total price*tax+price

printf("\nTotal cost= %ld\n",total);
system("pause");
return 0;
}

What it does is it asks for the cost of something, then gives you the cost after adding tax to it. But something is wrong with my variable "tax". Can anyone help please?

Mjordan2nd · May 21st, 2005, 7:27 PM

I don't think it's a problem with tax. When you make total a variable it works fine. My guess is that there is a different way of defining that, but I don't know how.

nez · May 21st, 2005, 7:41 PM

(Toggle Plain Text)

#include <stdio.h>

flaot tax;
int price; 
float total;

int main()
{
tax=0.15;
printf("What is the Cost?");
scanf("%d", &price);

total=(price*tax)+price;

printf("\nTotal cost = %2.2lf\n",total);

return 0;
}

I think that does the same thing as what u were trying to do but without the define bit, calling total a flaot instead

is this any help?
(i found it useful for me even if it didnt help you)

nez

Navid · May 21st, 2005, 9:55 PM

yeah thanks man

but now i have to find out about "%2.2lf"

but this is my first day of C so blah :p

Mjordan2nd · May 21st, 2005, 10:15 PM

It's just going to print two decimal places with that.

nez · May 22nd, 2005, 5:12 AM

you could have just put "%lf" in but it wil print a number with 4 decimal places, the 2.2 just tames it a bit:

2.2 prints a number with 2 long to 2 decimal places i.e 10.65
4.3 prints a number with 4 long to 3 decimal places i.e 4512.854

hope this helps

nez

Ooble · May 22nd, 2005, 6:54 AM

Basically, tax needs to equal 0.15, not .15.

Navid · May 22nd, 2005, 7:23 PM

thanks guys

even though SAMS has a good reputation, i always have questions

this forum shuting down would be a nightmare

May 21st, 2005, 7:12 PM	#1
Navid Hobbyist Programmer Join Date: Feb 2005 Location: Canada Posts: 187 Rep Power: 4	small problem (Toggle Plain Text) #include <stdio.h> float tax = .15; int price; int main(void) { printf("What is the Cost?"); scanf("%d", &price); #define total pricetax+price printf("\nTotal cost= %ld\n",total); system("pause"); return 0; } #include <stdio.h> float tax = .15; int price; int main(void) { printf("What is the Cost?"); scanf("%d", &price); #define total pricetax+price printf("\nTotal cost= %ld\n",total); system("pause"); return 0; } What it does is it asks for the cost of something, then gives you the cost after adding tax to it. But something is wrong with my variable "tax". Can anyone help please?

May 21st, 2005, 7:27 PM	#2
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	I don't think it's a problem with tax. When you make total a variable it works fine. My guess is that there is a different way of defining that, but I don't know how. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

May 21st, 2005, 7:41 PM	#3
nez Programmer Join Date: May 2005 Location: Plymouth UK Posts: 34 Rep Power: 0	(Toggle Plain Text) #include <stdio.h> flaot tax; int price; float total; int main() { tax=0.15; printf("What is the Cost?"); scanf("%d", &price); total=(pricetax)+price; printf("\nTotal cost = %2.2lf\n",total); return 0; } #include <stdio.h> flaot tax; int price; float total; int main() { tax=0.15; printf("What is the Cost?"); scanf("%d", &price); total=(pricetax)+price; printf("\nTotal cost = %2.2lf\n",total); return 0; } I think that does the same thing as what u were trying to do but without the define bit, calling total a flaot instead is this any help? (i found it useful for me even if it didnt help you) nez __________________ atariboy.wordpress.com

May 21st, 2005, 10:15 PM	#5
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	It's just going to print two decimal places with that. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

May 22nd, 2005, 5:12 AM	#6
nez Programmer Join Date: May 2005 Location: Plymouth UK Posts: 34 Rep Power: 0	you could have just put "%lf" in but it wil print a number with 4 decimal places, the 2.2 just tames it a bit: 2.2 prints a number with 2 long to 2 decimal places i.e 10.65 4.3 prints a number with 4 long to 3 decimal places i.e 4512.854 hope this helps nez __________________ atariboy.wordpress.com

May 21st, 2005, 9:55 PM	#4
Navid Hobbyist Programmer Join Date: Feb 2005 Location: Canada Posts: 187 Rep Power: 4	yeah thanks man but now i have to find out about "%2.2lf" but this is my first day of C so blah :p

May 22nd, 2005, 6:54 AM	#7
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	Basically, tax needs to equal 0.15, not .15. __________________ Me :: You :: Them Last edited by Ooble; May 22nd, 2005 at 6:56 AM.

May 22nd, 2005, 7:23 PM	#8
Navid Hobbyist Programmer Join Date: Feb 2005 Location: Canada Posts: 187 Rep Power: 4	thanks guys even though SAMS has a good reputation, i always have questions this forum shuting down would be a nightmare

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Programming Forums > Application Development > C

small problem