How Can I write strings in a new line with C Ansi ?e

[LRicardo]

I wanna write string in a new line. How can i do that ?


int main(int argc, char* argv[])
{
FILE *ponteiro_arquivo;

int i =0;

strcpy(sLinha, "0001 123456 nf 0,12\n"); /* copy 1 line*/

for (i =0 ; i < 5; i++)
if((ponteiro_arquivo = fopen ("c:\\gravar.txt", "w"))!= NULL){
fprintf(ponteiro_arquivo, sLinha);
/*always writing only the last line */
fclose (ponteiro_arquivo);
}


Thanks for help me

[lerouxc1]

You are overwriting the file in each iteration of the loop. Try moving the open and close statements outside of your loop.

Or you can open the file for "write/append", in which case your printf will simply add a line at the end of the file. In your example, both of these methods would produce the same output.

Hope this helps,
Cedric

[LRicardo]

THANKS FOR YOUR HELP... IT'S RUN NOW.

I JUST OPEN THE FILE WITH OPTION "a".

[CornedBee]

it's still bad because it leaves with a lot of opened files hanging around - VERY bad! And it causes you to reopen it often - VERY slow!

int main(int argc, char* argv[]) 
{ 
FILE *ponteiro_arquivo; 

int i =0; 

strcpy(sLinha, "0001 123456 nf 0,12\n"); /* copy 1 line*/ 
if((ponteiro_arquivo = fopen ("c:\\gravar.txt", "wt"))== NULL)
{
  printf("Error!\n");
  return -1;
}
for (i =0 ; i < 5; i++) 
{ 
fprintf(ponteiro_arquivo, sLinha); 
/*always writing only the last line */ 
} 
fclose (ponteiro_arquivo); 
// ...