Integer partitioning

[muhFah]

can someone give me the c code for integer partitoning

i.e. for the integer 4 u must print

4
3 1
2 2
2 1 1
1 1 1 1

I wrote the following code interpreting a java code, but it isn,t working, I want much simpler version of the following code.

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

void partition (int n, int max, char prefix[]);
char * processAnswer (char prefix[], int n);

int main ()
{
    int n;
    int flag;
    
    while (1){
          printf ("Enter the number (integer): ");
          flag = scanf ("%d", &n);
          
          if (flag==0)
          {
             printf ("Not an integer");
          }
          else if (flag == 1)
          { 
             break;
          }
    }
    
    partition (n, n, "");
    
    int x;
    scanf ("%d", &x);
          
    return 0;
}


void partition (int n, int max, char prefix[])
{
     if (n==0)
     {
        printf ("%s", prefix);
        return;
     }
     
     int min;
     int i;
     char * ptr;
     
     if (n<max)
     {
        min = n;
     }
     else
     {
         min = max;
     }
     
     for (i=0; i>=min; i+-1)
     {
        char * ch =  processAnswer (prefix, i);
        partition ( (n-i), i, ch );
     }
     
}

char * processAnswer (char prefix[], int n)
{
     char ans[100];
     char ch; 
     int i=0;        
     
     ch=prefix[0];
     while (ch!='\0')
     {
           ans[i] = ch;
           i+=1;
           ch=prefix[i];
     }
     
     ans[i] = ' ';
     
     i+=1;
     ans[i] = (char) n;
     
     i+=1;
     ans[i] = '\0';
     
     char * ptr = &ans[0];
     return ptr; 
}

Thankz in advance

[Salem]

> char * ptr = &ans[0];
You're returning a pointer to a local variable - that is, it goes out of scope and no longer exists when the function returns.

It's probably simpler to declare your array in partition(), and pass it as an 'out' parameter (where you want the answer stored), when you call processAnswer