Solved

Calculate a firsts numbers

Posted on 2003-10-27
1
169 Views
Last Modified: 2010-04-01
I have a program but this don't work, this programe had to calculate a firsts numbers of a serie, thanks.

#include <stdio.h>
#include <string.h>
#include <math.h>
void main()
{
        char c[255];
      long int m=1,cont1,cont2,b=2;
        printf("\n Tria si vols imprimir una llista de nombre parells,\n o una llista de nombres primers: ");
      scanf("%s",&c);
      printf("\nIntrodueix el primer numero de la serie: ");
      scanf("%ld",&cont1);
      printf("\nIntrodueix el segon numero de la serie: ");
      scanf("%ld",&cont2);
      if (!strcmp (c,"primers")){
            while (cont1<cont2){
                  while ((b>(cont1/2)) && (m!=0)){
                  if((cont1%b)!=0) b=b+1;
                  if((cont1%b)==0) m=0;
                  }
                  if (m==0){
                         printf("\nEl nombre %ld és primer",cont1);
                         m=1;
                         }
                  ++cont1;
                  }
      }
      if (!strcmp (c,"parells")){
            if((cont1%2)!=0) ++cont1;
            while (cont1<cont2){
                  printf("%ld\n", cont1);
                  ++cont1;
                  ++cont1;
                  }
              if((cont2/2)==0) printf("%ld",cont2);
      }        
}
0
Comment
Question by:FxSedge
1 Comment
 
LVL 13

Accepted Solution

by:
SteH earned 50 total points
ID: 9632232
Is this homework? I guess yes, so I give just hints:
put the line
printf ("%d %d %d\n", cont1, b, m);
after while (cont1<cont2) and look whether the values are as you expect.

Another thing:

 if (test != 0) do1;
 if (test == 0) do2;

can be rewritten as

if (test != 0)
     do1;
else
     do2;
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When writing generic code, using template meta-programming techniques, it is sometimes useful to know if a type is convertible to another type. A good example of when this might be is if you are writing diagnostic instrumentation for code to generat…
Templates For Beginners Or How To Encourage The Compiler To Work For You Introduction This tutorial is targeted at the reader who is, perhaps, familiar with the basics of C++ but would prefer a little slower introduction to the more ad…
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question