Help fixing my Program?

Sep 17, 2012 at 12:30pm

somehow the pow funkiton wont work propperly... the prints are in german just fyi =D

#include <stdio.h>
#include <math.h>

int main()

{
	int n = 0;
	int K = 0;
	int p = 0.03;
	double Kn1 = 0;
	double Kn2 = 0;
	double x = 0;
	double y = 0;
	
		
	printf("		Zinsprogramm		\n");
	printf("		------------		\n\n");
	printf("	Bitte Laufzeit in Jahren eingeben:\n"); //insert runtime in years

	scanf("%d", &n);

	printf("	Bitte Kapital eingeben:\n\n"); //insert your capital

	scanf("%d", &K);

	printf("	Der Zins betraegt 3%%.\n"); //interest rate is 3%

	Kn1 = K*(1+p);

	x = Kn1;
	y = n;

	Kn2 = pow( x, y );


	printf("	Nach %d Jahren ist ihr Kapital auf %lf gestiegen",n ,Kn2);
//after x years your capital has risen to y
	printf("\n");
	printf("\n");
	printf("\n");
	printf("\n");

	return 0;
}

Edit & run on cpp.sh

Last edited on Sep 21, 2012 at 6:37am

Sep 17, 2012 at 12:35pm

Peter87 (11251)

What do you mean by not working? Is it returning the wrong value?

Sep 17, 2012 at 12:45pm

Moschops (7244)

int p = 0.03;

What kind of integer is this? The kind with decimal places? That's not an integer.

Sep 17, 2012 at 12:53pm

Aceix (1118)

@OP if you want to do something like p=0.03, make p a float

Sep 17, 2012 at 5:59pm

alcan4 (4)

@Peter87 The "not working" part is, it outputs 3200000000000000000000 instead of 23000

@Moschops int p = 0.03; wasnt supposed to be an int, it was a double before but i tried some things and thought they might fix it and forgot to change that one back.

@Aceix I pretty much started with C about 2 weeks ago in school but my teacher is to lazy or doesn't know how to make this work. Does making it a float require me to change anything else except for that and the placeholders?

Last edited on Sep 17, 2012 at 6:01pm

Sep 17, 2012 at 7:03pm

Peter87 (11251)

I think you should use %f instead of %lf.

Sep 17, 2012 at 9:35pm

alcan4 (4)

would that really make a difference?

Sep 17, 2012 at 11:11pm

Peter87 (11251)

I think so. %f is for float and double, and %lf is for long double if I'm not mistaken.

Sep 21, 2012 at 6:30am

alcan4 (4)