Acsor: Created page with " == Esame Pratico 22/01/2016 == http://www.cs.unibo.it/~renzo/so/pratiche/2016.01.22.pdf === Esercizio 1 === #include #include #include ..."

2020-08-30T08:14:09Z

Created page with " == Esame Pratico 22/01/2016 == http://www.cs.unibo.it/~renzo/so/pratiche/2016.01.22.pdf === Esercizio 1 === <source lang="c"> #include <stdlib.h> #include <stdio.h> #include ..."

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== Esame Pratico 22/01/2016 ==
http://www.cs.unibo.it/~renzo/so/pratiche/2016.01.22.pdf
=== Esercizio 1 ===
<source lang="c">
#include <stdlib.h>
#include <stdio.h>
#include <dirent.h>
#include <sys/types.h>
#include <string.h>
#include <unistd.h>

typedef struct nameNumber {
char *name;
int value;
} nameNumber;

int prefixToInt (char *string) {
int i = 0;
int num = 0;

while (string[i] >= '0' && string[i] < '9' && i < strlen(string)) {
num = (num*10) + (string[i]-'0');
i++;
}
return num;

}

void fileSort(struct nameNumber **files) {

}

int comp (const void * el1, const void * el2) {
struct nameNumber *f = *((nameNumber**)el1);
struct nameNumber *s = *((nameNumber**)el2);
if (f->value > s->value) return 1;
if (f->value < s->value) return -1;
return 0;
}

int main(int arg, char* argv[]) {
struct nameNumber **files;

DIR *dir;
struct dirent *ent;

int count = 0;

if((dir = opendir(argv[1])) != NULL)
{
while( (ent = readdir(dir)) != NULL )
{
if (ent->d_name[0] < '9' && ent->d_name[0] >= '0')
{
files = (struct nameNumber**)realloc(files , (count+1) * sizeof(struct nameNumber*));
files[count] = (struct nameNumber*)malloc(sizeof(struct nameNumber));
files[count]->name = (char*)malloc(sizeof(char)*strlen(ent->d_name) + 1);
strcpy(files[count]->name, ent->d_name);
files[count]->value = prefixToInt(files[count]->name);
printf("name : %s , value : %d\n", files[count]->name , files[count]->value);
count++;
}
}
}

qsort(files, count, sizeof(nameNumber*), comp);

int i;
for (i=0; i < count; i++) {
printf("%s\n",files[i]->name);
}

}

</source>

Prove pratiche 2016 - Revision history

Acsor: Created page with " == Esame Pratico 22/01/2016 == http://www.cs.unibo.it/~renzo/so/pratiche/2016.01.22.pdf === Esercizio 1 === #include #include #include ..."