# Jumping into C++ problems

• 01-14-2013
Jumping into C++ problems
Hi, I have written the code of the question "Design a program that finds all numbers from 1 to 1000 whose prime factors, when addedtogether, sum up to a prime number (for example, 12 has prime factors of 2, 2, and 3, which
sum to 7, which is prime). Implement the code for that algorithm."
the code is
Code:

``` #include <iostream> using namespace std; bool isdivisible(int z,int i) {     return z%i==0; } bool (isprime (int z)) {   for (int h=2;h<z;h++)   {   if (isdivisible(z,h))     {       return false;     }   }     return true; } int main() {     for ( int k = 2;k<10; k++) {     int i=2;     int y=0;     int x;     x=k;         while(i<=x)     {         if (x%i==0)         {           x=x/i;           y=y+i;         }         else         {i++;}     }     int z;     z=x+y-1;     if (isprime(z))     {         cout<<k<<endl;     }     } }```
the problem is that the console window cant display all the results. It omits the 1st few result. How can I increse the space so that it can display all the results?
• 01-14-2013
Shakti
I gave you a link that describes how to write to a file in this thread: http://cboard.cprogramming.com/cplus...problem-2.html

• 01-14-2013
Quote:

Originally Posted by Shakti
I gave you a link that describes how to write to a file in this thread: http://cboard.cprogramming.com/cplus...problem-2.html

I have done what it says like this, nothing happens,

Code:

```#include <fstream> #include <iostream> using namespace std; bool isdivisible(int z,int i) {     return z%i==0; } bool (isprime (int z)) {   for (int h=2;h<z;h++)   {   if (isdivisible(z,h))     {       return false;     }   }     return true; } int main() {     for ( int k = 2;k<10; k++) {     int i=2;     int y=0;     int x;     x=k;         while(i<=x)     {         if (x%i==0)         {           x=x/i;           y=y+i;         }         else         {i++;}     }     int z;     z=x+y-1;     if (isprime(z))     {  char str[10];         ofstream file ("example");         file<<z;         file.close();     }     } }```
• 01-15-2013
King Mir
Quote:

Originally Posted by Tamim Ad Dari
the problem is that the console window cant display all the results. It omits the 1st few result. How can I increse the space so that it can display all the results?

You can pipe the output to a pager, like "more" or "less" as in:
\$program | more
• 01-16-2013
Aslaville
I think the problem lies in your algorithm,,,the console window is capable of displaying thousands of values,..let me check it out:tongue:
• 01-16-2013
Matticus
Quote:

Originally Posted by Tamim Ad Dari
I have done what it says like this, nothing happens,