Strutture ordinate

[xgiovio]

#include <st***.h>
#include <stdlib.h>
#include <string.h>

#define ELEMENTS(array) (sizeof(array)/sizeof(array[0]))
#define NUMBER 2


typedef struct {
 
    char * nome;
    char * cognome;
    unsigned int esami;
    float media;
    
} studente_struct;

int compara_struct_nome (const void * a , const void * b);
void stampa_struct ( studente_struct * a);



int main ( void ) {
    
char buffer[50];
int i;

studente_struct studente[NUMBER];

for (i=0;i<NUMBER;i++){

    printf ("Nome\n");
    scanf ("%49s",buffer);
    (*(studente +i)).nome= strdup(buffer);
    
    printf ("Cognome\n");
    scanf ("%49s",buffer);
    (*(studente +i)).cognome= strdup(buffer);
    
    printf ("Esami\n");
    scanf ("%u",&((*(studente+i)).esami) );
    
    printf ("Media\n");
    scanf ("%f",&((*(studente+i)).media) );
    
}

////////////////////////////// ordina per nome
    
    qsort(studente , ELEMENTS(studente) , sizeof(studente[0]), compara_struct_nome);
    stampa_struct (studente);

/////////////////////////////////

 return 0;
}


int compara_struct_nome (const void * a , const void * b){
    
    studente_struct * dat1 = ( studente_struct *) a;
    studente_struct * dat2 = (studente_struct *) b;
    
    return strcmp ( (*(dat1)).nome , (*(dat2)).nome );
    
}

void stampa_struct ( studente_struct * a){
    
    int i;
    
    for(i=0;i<NUMBER;i++){
        
        printf ("%s\n", (*(a + i)).nome);
        printf ("%s\n", (*(a + i)).cognome);
        printf ("%u\n", (*(a + i)).esami);
        printf ("%f\n", (*(a + i)).media);
        
    }
    
}