Thread: Rule of 72 Code Help plz

Originally posted by wnight77
LOL my apologies didnt read the READ THIS BEFOR U POST CODE THREAD lol

Then edit your post, and put the code tags on

And whilst you're at it, get rid of void main, it should be int main(void) with a return at the end of it.

>>plz heal me solves this error
What error? You need to describe your problem.


[edit]
>>while(actual <= 2*10);
Get rid of the trailing semi-colon.

>>actual += (actual) * (i / 100);
Think that one through again. Hint: 1/100 = ??

void main is the same as return 0 my instructor wants me to use void main instead of return 0

now the problem im having is... i need to have this display 3 colums of information and its not working correctly i think its my equation but i dont know... the easyest way to see this would be to write in real quick <takes liek 15 seconds> then run it it looks like this when its semi working

Code:

/*interest      rule
rate(%)      of 72       actual

1                72            this is the messed up colum
2                numbers from equation
3
4
5
6
7
8
9
down to 20
*/

Code:

 /*

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

void main()
{
	int i,/*is the inteest rate*/ math,/*is the amount of time befor the amount double in years accourding to the 72/r ruel r= i in my case*/ actual/* amount using a more precise calculation*/;
	
	printf("Assignment #3 Rule of 72\n");
	printf("Time it takes for prices to double due to inflation.\n\n");
	printf("Interst\t Rule\n");
	printf("Rate(%%)\t of 72 \t Actual\n\n");
	for (i=1; i<21; i++ ){
		math = 72/i;
		actual = 10;
		
		
		
		while(actual <= 2*10);
		actual +=(actual)*(1+i/100);
		printf("%d\t %d\t %d\n", i, math, actual);	

}
}*/

>>void main is the same as return 0 my instructor wants me to use void main instead of return 0
No, its not. Do a search, or read the FAQ if you want to know more.

Did you see my edits in my previous post?

ok i see edits now im trying it but my teacher wants me to use void main i dont know what it affects is jtu know thats what i gota do to get my points hehe =)


also its

actual = actual + (i/100 )*(actual)

i got thaat equation from my buddy that has it working so did i do seomthing wrong???

>>i/100
You need to learn about ints and floats.

An int holds a whole number only, so if you do division like 1/100, which would normally be .01, the answer in C is 0 if you are using ints. A float can hold a number with precision, eg 10.12

Have a think about where you need to apply this, and see what you come up with. As a starter (this one isn't obvious), you can use i/100.0 to force that part of the equasion to think in float terms.