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/* Simple single-linked list example program */

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

#define max_s 25

typedef char vardas[max_s];

struct node {   /* basic list structure */
       vardas name;
       int age;
       struct node * next; 
       };
       
node * add(node *p, int d, vardas n)
{
    node * newe;
    newe = ( node *) malloc(sizeof(node ));
    newe->age = d;
    strcpy(newe->name, n);
    newe->next = p;
    p = newe;
    return p;
 }   
 
node *pop(node *p, int  * d)
{
   node * old = p;
   *d = p->age;
   p = p->next;
   free(old);
   return p;
}

node *del(node *p, int d)
{
     node *tmp=NULL;
     int data; vardas _tmp_s;
     while (p)
       {
        p = pop(p, &data);  
        if (d != data) {tmp = add(tmp, data, _tmp_s);
       } 
    p = tmp;     
    return p;   
}
}
int sort(int  m[], int n)
{
  int i, j; int tmp;
  for (i=0; i <n ; i++)
    for (j=i+1; j < n-1; j++)
       {
          if (m[j] > m[i])
             {
               tmp = m[j];   
               m[j] = m[i];
               m[i] = tmp;
             }
       }
   for (i=0; i < n; i++)
       {
          printf("%d", m[i]);              
       }
}
void print(node *p)
{
   int n=0; int m[max_s];
        while (p)
          {
              
              printf("%s - %d\n", p->name, p->age);
              m[n] = p->age;
              p = p->next;
              n++;
          }
    sort(m, n);      
 }
 


/* main function */

int main()
{
    vardas _name; int age; int n=0;
    int i=0;
    node *p = NULL;
    printf("PART I: SIMPLE DATA ENTER\n");
    do
     {
       printf("Student name:"); scanf("%s", &_name);
       printf("Student age:"); scanf("%d", &age);
       printf("\n");
        if ((age != 0) && (strcmp(_name, "quit")))
           {
             p = add(p,age, _name);
             n++;
           }     
    } while (age != 0 && strcmp(_name, "quit"));
    if (n>0)
      {
         printf("PART II: LISTING AND SORTING\n");
         printf("DATA:\n");
         print(p);
         getchar();
       }  
    getchar();
}