My first and simple program

[Neotriz]

Hi there

I'm still new to this Programming thing so bear with me:

I'm trying to set a program that reads like this:

-How many cakes did you eat today?
__


-You gained __ lbs.


here are my variables:


5000 Calories = 1 cake
1 lbs = 3500 Calories


heres my setup:


#include<stdio.h>
#define CALORIES_IN_CAKE 5000
#define CALORIES_IN_POUND 3500

int main (void) {

double pounds_in_cake, num_cakes;

pounds_in_cake=(CALORIES_IN_CAKE)/CALORIES_IN_POUND;

printf("How many cakes did you eat today?\n");
scanf("%lf", &num_cakes);
printf("You gained %.2lf pounds.\n",

pounds_in_cake*num_cakes);

system("PAUSE");
return 0;

}


However, my output is wrong.

I cant seem to find the problem

Any response will greatly appreciated

[bithub]

The problem is this line:

pounds_in_cake=(CALORIES_IN_CAKE)/CALORIES_IN_POUND;

This does integer arithmetic, so pounds_in_cake will always equal 1. To fix this, cast one of the values to a double to ensure that floating point arithmetic is done:

pounds_in_cake=(double)CALORIES_IN_CAKE/CALORIES_IN_POUND;

[Neotriz]

Thanks birthtub!

[Neotriz]

Here's another program I want to setup:

-How many people did you kill today?
__


You will serve __ of years in jail


so my variables are:

For every one person you kill, you will serve 7 years




#include <stdio.h>
#define YEARS_EACH_PEOPLE=7
#define PEOPLE_KILLED=1

int main (void) {

int years_served_per_killing, num_killings;

years_served_per_killing=YEARS_EACH_PEOPLE*PEOPLE_ KILLED;

printf("How many people did you kill today?\n");
scanf("%d", num_killings);
printf("You will serve %d of years in jail.\n", years_served_per_killing*num_killings);

system("PAUSE");
return 0;

}


I get an error in :

ears_served_per_killing=YEARS_EACH_PEOPLE*PEOPLE_K ILLED

dont really understand what the problem is though

[Kennedy]

Thanks birthtub!

bithub has a new nickname!!!!

[ssharish2005]

Youve got '=' char in your marco. take out that and also you've got a space in between People_ Killed.

#define YEARS_EACH_PEOPLE=7
#define PEOPLE_KILLED=1

years_served_per_killing=YEARS_EACH_PEOPLE*PEOPLE_ KILLED;

To be honest, you dont need to find the year)_served_per_killing. You could just getting the no of people killed * YEARS_EACH_PEOPLE

Thats should do it.

~ssharish

[ssharish2005]

bithub has a new nickname!!!!

Thats wicked man!!!! lol

~ssharish

[Neotriz]

ssharish, I still get the error.

what do you mean by " '=' char in my marco"?

[Dino]

Thats wicked man!!!! lol

~ssharish

Yes, that's a winner.

[bithub]

bithub has a new nickname!!!!

At least he didn't call me bathtub. Although now that I think about it, birthtub may be worse...

what do you mean by " '=' char in my marco"?

You need to get rid of the equals sign.

[Neotriz]

At least he didn't call me bathtub. Although now that I think about it, birthtub may be worse...

You need to get rid of the equals sign.

sorry for the nickname. It is rather humorous haha

But anyway, i cant seem to get it work at all

Can you post the whole script and see if it works?

[bithub]

scanf() should take a pointer to an integer.

scanf("%d", &num_killings);

[Neotriz]

Still not working

[whiteflags]

What does the compiler or output look like?

[kermit]

You should learn to use code tags when you post your programs.