Newbie in need of help

[Tarento]

I'm doing homework right now, and it wanted me to do this.

Sphere ( 1)      R = 1.10      A =  15.2053      V =   5.5753
Sphere ( 2)      R = 1.20      A =  18.0956      V =   7.2382
...........      ........      ............      ............
...........      ........      ............      ............
Sphere (20)      R = 3.00      A = 113.0973      V = 113.0973

The first one is just the sphere's name, second column is the sphere's radius, third is its area with that radius, and fourth is the volume.

I'm pretty sure I can do most of the programming, but I don't understand two things.

1) How do you get the numbers to go up by in the sphere and R = ? (R is going up by .1! I only learned how to increment it by 1)

2) How do I number the spheres with two characters?
Like

Sphere( 1)

Not

Sphere(1)

?

Much thanks guys, this looks like a very helpful site.

[Tonto]

Addition instead of increment (on a floating point variable)

for(double R = 1.0; R < 3.0; R += .1)

This example has parentheses only to demonstrate it. The %2d specifies a field of width 2.

printf("(%2d) (%2d)", 1, 11);

[jafet]

If you only need 1 digit of accuracy, and you don't need huge numbers, you can represent them as ints, only 10 times larger, then convert back at run-time for display/calculations.

[Tarento]

This example has parentheses only to demonstrate it. The %2d specifies a field of width 2.

printf("(%2d) (%2d)", 1, 11);

[/QUOTE]

I get this as a result.

Sphere ( 1) (11)Sphere ( 1) (11)Sphere ( 1) (11)Sphere ( 1) (11)Sphere ( 1) (11)

etc... How do I get it to go down like the example below? *I'm using SSH Secure Shell since it's a required program*

Sphere ( 1)
Sphere ( 2)
Sphere ( 3)
Sphere ( 4)
Sphere ( 5)

Much thanks.

[Tonto]

Just by slightly modifying my code.

int main()
{
	for(int i = 1; i <= 5; i++)
	{
		printf("Sphere (%2d)\n", i);
	}
}

[Tarento]

Much thanks for the help Tonto, it worked! This is a bit harder than I thought. I think I can handle it from here.

[Tarento]

Yep, I'm back.

I've been making really slow, but sure progress, but now I'm stuck.

{
int i;
int k;

        for(i=1; i<21; i++)
for(k=1; k<21; k++)
        {
                printf("Sphere (%2d)     Area = %2d\n", i, k);

}
}

This gives me...

Sphere ( 1)     Area =  1
Sphere ( 1)     Area =  2
Sphere ( 1)     Area =  3
Sphere ( 1)     Area =  4
Sphere ( 1)     Area =  5
Sphere ( 1)     Area =  6
Sphere ( 1)     Area =  7
Sphere ( 1)     Area =  8
Sphere ( 1)     Area =  9
Sphere ( 1)     Area = 10
Sphere ( 1)     Area = 11
Sphere ( 1)     Area = 12
Sphere ( 1)     Area = 13
Sphere ( 1)     Area = 14
Sphere ( 1)     Area = 15
Sphere ( 1)     Area = 16
Sphere ( 1)     Area = 17
Sphere ( 1)     Area = 18
Sphere ( 1)     Area = 19
Sphere ( 1)     Area = 20
Sphere ( 2)     Area =  1
Sphere ( 2)     Area =  2
etc...

How would I avoid the spheres being repeated 20 times? And how would I make it like the example below?

Sphere ( 1)     Area = 1
Sphere ( 2)     Area = 2
etc...

Sorry for so many Questions.

[Salem]

Because you should be performing some kind of calculation for each sphere

for(i=1; i<21; i++)
{
    printf("Sphere (%2d)     Area = %d\n", i, i*i);
}

Note that i*i is not the function for calculating the surface area of a sphere, that's for you to research.