freopen si EOF

[•mingw]

Cum pot folosi functia freopen sa citesc din fisier pana cand se termina ?

exact ca si cu streamuri!

Cod:

while(citeste)
   {
executa
   }

[•gabitzish1]

Cod:

freopen("nume","r",stdin);

while (!feof(stdin))
{
       citeste;
       executa;
       etc..
}

[•filipb]

Cod:

freopen("a.txt", "r", stdin);
while (scanf("%d", &x) != EOF)
     printf("%d\n", x);

[•toni2007]

cu feof nu e bine   iti baga ultimu caracter de doua ori... e mai bine atunci cand ai siruri de caractere:

Cod:

while (gets(s)){
    faci ce vrei sa faci;
}

sau

cum a zis filip cristian buruiana cand tre citit numar

[•rEbyTer]

pentru caractere nu merge asa?

Cod:

freopen("a.txt", "r", stdin);
char x;
while (scanf("%c", &x) != EOF)
     printf("%d\n", x);

[•flo_demon]

Si asa se poate. eu cel putin folosesc metoda asta.

Cod:

while (scanf(%c", &x) > 0)
    printf("%c", x);

http://www.cplusplus.com/reference/clibrary/cstdio/scanf.html

Return Value
On success, the function returns the number of items succesfully read. This count can match the expected number of readings or fewer, even zero, if a matching failure happens.
In the case of an input failure before any data could be successfully read, EOF is returned.

[•rEbyTer]

cand atinge EOF returneaza -1 ?

[•tvlad]

Da, returneaza constanta EOF care e -1

[•wefgef]

Eu stiam ca valoarea EOF e machine dependent .