Il seguente esempio assegna dinamicamente un allineamento delle strutture per immagazzinare i nomi ed il grado degli allievi. I gradi allora sono visualizzati di nuovo all'utente nell'ordine ascendente.
#include <string.h>
#include <malloc.h>
struct student
{
char *name;
int grade;
};
void swap(struct student *x, struct student *y);
int main()
{
struct student *group;
char buffer[80];
int spurious;
int inner, outer;
int counter, numStudents;
printf("How many students are there in the group: ");
scanf("%d", &numStudents);
group = (struct student *)malloc(numStudents *
sizeof(struct student));
for (counter=0; counter<numStudents; counter++)
{
spurious = getchar();
printf("Enter the name of the student: ");
gets(buffer);
group[counter].name = (char *)malloc((strlen(buffer)+1) * sizeof(char));
strcpy(group[counter].name, buffer);
printf("Enter grade: ");
scanf("%d", &group[counter].grade);
}
for (outer=0; outer<numStudents; outer++)
for (inner=0; inner<outer; inner++)
if (group[outer].grade <
group[inner].grade)
swap(&group[outer], &group[inner]);
puts("The group in ascending order of grades ...");
for (counter=0; counter<numStudents; counter++)
printf("%s achieved Grade %d \n”,
group[counter].name,
group[counter].grade);
return 0;
}
void swap(struct student *x, struct student *y)
{
struct student temp;
temp.name = (char *)malloc((strlen(x->name)+1) *
sizeof(char));
strcpy(temp.name, x->name);
temp.grade = x->grade;
x->grade = y->grade;
x->name = (char *)malloc((strlen(y->name)+1) *
sizeof(char));
strcpy(x->name, y->name);
y->grade = temp.grade;
y->name = (char *)malloc((strlen(temp.name)+1) *
sizeof(char));
strcpy(y->name, temp.name);
}
L'esecuzione dell'uscita sarà come segue:
How many students are there in the group: 4
Enter the name of the student: Anuraaj
Enter grade: 7
Enter the name of the student: Honey
Enter grade: 2
Enter the name of the student: Meetushi
Enter grade: 1
Enter the name of the student: Deepti
Enter grade: 4
The group in ascending order of grades ...
Meetushi achieved Grade 1
Honey achieved Grade 2
Deepti achieved Grade 4
Anuraaj achieved Grade 7 |
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