Counting backwards:

[jocdrew21]

So I been browsing the internet and doing random practice exercises before I start my C++ class next week.

This question wanted me to count 1-99 backwards and print "found one" when the number was divisible by 5. This is what I got so far.

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

int main(int argc, const char * argv[])
{

    
    int i = 0;
    
    for (i = 0; i<100; ++i) {
        
        printf("%d\n",i);
        
        if ((i%5)== 0) {
            printf("found one\n"); //every number this is divisible by 5 write found one 
        }
        
        i++;
    }
    return 0;
}

[DRK]

for (i = 99; i > 0; --i)

[acho.arnold]

This question wanted me to count 1-99 backwards and print "found one" when the number was divisible by 5. This is what I got so far.

#include <stdio.h>


int main(int argc, const char * argv[])
{
 
     
    int i;
     
    for (i = 99; i > 0; i--)//This will count from 99 decrementally till it reaches 1 
     {
        printf("%d\n",i);
         
        if ((i%5)== 0) 
        {
            printf("found one\n"); //every number this is divisible by 5 write found one 
        }
    }
    return 0;
}

Good luck with your C++ programing which school btw

[jocdrew21]

I tried that but it looped forever with negitive numbers. I'll try again, most likely I did something wrong...

Thomas Edison State in New Jersey...

[jocdrew21]

It worked... I wonder what the heck I did it make it produce huge numbers like -16000. I'll have to look at my compiler at home. Thank you for the help.

[bos1234]

Also try implementing with do while loop for practice. Why are you practicing C if your starting C++?

answer for above:

#include <stdio.h>

int main()
{
	int number = 99;

	do
	{
		printf("%d\n", number);
		if (number %5 == 0)
		printf("found one\n");
		number--;
	}while (number > 0);

	return 0;
}

[jocdrew21]

I bought "Jumping into C++" from this website so I have been reading that. I also have been reading Objective-C by Big Nerd Ranch which is where I found this little program. Big Nerd Ranch briefly goes over C and actually taught me some small details I missed. I have been writing C++ programs from "Jumping into C++", and C++ seems to be very similar to C just has different syntax’s and larger library. Something’s are much easier to work with too, like strings and the ability to write into a for statement.

[anduril462]

I bought "Jumping into C++" from this website so I have been reading that. I also have been reading Objective-C by Big Nerd Ranch which is where I found this little program. Big Nerd Ranch briefly goes over C and actually taught me some small details I missed. I have been writing C++ programs from "Jumping into C++", and C++ seems to be very similar to C just has different syntax’s and larger library. Something’s are much easier to work with too, like strings and the ability to write into a for statement.

Argh! No, this is the wrong approach. That's like studying a Spanish vocabulary book and an Italian grammar book, then pronouncing it all with a French accent, and thinking you then know any of those languages. You'll end up not really knowing any of them. They are three totally separate languages, despite the misleadingly similar names. Pick one and only one programming language to start learning. There is much more that is different between C and C++ besides just "syntax's and a larger library". C++ takes a fundamentally different approach to problem solving (object-oriented), and while a C++ compiler will usually accept C programs, it doesn't mean you're writing good C or C++. Learning to program is more than just learning a bit of syntax, to really learn to program is to learn to think and to solve problems in a particular way, using the features and methodologies supported by a language. When you transition languages, the first step is just to learn the new syntax, library functions, etc. But that's the easy part, the hard part is learning to think about problem solving in a whole new way. Wait until you have a pretty thorough knowledge of one language before starting to learn another, especially since you're new to programming in general. If you're starting a C++ class, then stick strictly to C++.

[jocdrew21]

Ok.... Your right, I'll stick with C++. After the C++ class is over I have a whole 3 month class on Data Structures which is entirely in C++.

Won't knowing C help with C++?

[anduril462]

Won't knowing C help with C++?

Only very marginally. Once you get past the similar names and syntax, the similarities fall off rapidly, especially when it comes to the more important aspects like how you solve problems. If you had lots of time to become a C expert (and a general programming/problem solving expert) before you learn C++, then it might be worth it. But you don't, and your subsequent classes are C++ too, so just stick to C++ for now. Trying to learn too much at once will give you a superficial (at best) knowledge of these languages, and you wont be able to do anything very interesting in any of them.

[jocdrew21]

Will do, thanks.