josef.c

This program can solve Josf problem

      /* Loop Linklist with rear point */
#define ELEMENT_TYPE int   /* maybe need to change */
#include <stdio.h>
#include <stdlib.h>
typedef struct {
    ELEMENT_TYPE number;
    ELEMENT_TYPE code;
}type;

typedef struct Linklist{
        type data;
        struct Linklist *next;
}Node,*Linklist;

Linklist Creat_linklist(FILE *fd){
     int i=0;
     Linklist rear;
     Node *new; 
     ELEMENT_TYPE c;         
     int flag = 1;
     /* have a flag which is initiate 1 and when input '$' change flag to 0 */
     rear = (Linklist)malloc(sizeof(Node));    /* allocate memory to rear point */
     rear -> next = rear;
         
     while (flag){                 
         fscanf(fd,"%d",&c);              
         if(c != 0){  
           i++;                 
           new = (Node *)malloc(sizeof(Node));
           new -> data.code = c;
           new -> data.number=i;
           new -> next = rear -> next;
           rear -> next = new;
           rear = new;                 
         }/* if */
        else flag=0;
    }/* while */
   rear->next = rear -> next ->next;
   return rear;
}

Linklist Delete( ELEMENT_TYPE m,Linklist P){
        Linklist r;
        type a;
        int n;
        n=1;
        
        while(n!=m){
           n++;
           P = P->next;
        }
        r = P->next;
        P -> next = P -> next ->next;        
        return r;
}

int main(){
    Linklist rear,P,r;
    int m,n;
    int i;
    FILE *fd;
    type a;
    int code;
    fd = fopen("Josef.dat","r");
    fscanf(fd,"%d",&m);
    fscanf(fd,"%d",&n);
    rear = Creat_linklist(fd);
    fclose(fd);
    i=0;
    P = rear;    
    while(i!=n){
      i++;
      r = Delete( m ,P);
      P = r;
      m = r->data.code;
      printf("%d\n",r->data.number);
      free(r);
    }    
}