simple: integer to ascii

[1510982]

the problem is very simple, i have a for loop and i have to generate files 1.txt, 2.txt 3.txt... n.txt.

FILE *target;

for(i=0; i<100; i++) {
target = fopen(i . &quot;.txt&quot;,&quot;w&quot; //here comes the problem
fclose(target);
}

i thank you in advance, lorenzo

 

[palbano]

char buf[30];  // why 30? dunno... why not
for(i=0; i<100; i++) {
  sprintf( buf, &quot;%d.txt&quot;, i);
  target = fopen(i . buf,&quot;w&quot;); //there goes the problem
  fclose(target);
}

does that help?
-pete

 

[1510982]

palbano, thanks, ofcourse it helps.

here is fixed sourcecode:

FILE *test;
char buf[30];
for(int i=0; i<100; i++) {
sprintf(buf, &quot;%d.txt&quot;, i);
test = fopen(buf, &quot;w&quot;
fclose(test);
}

thanks again. lorenzo.

 

[lindaw]

The solution appears to be good, I did wonder in the first example why the file was never opened, but it was closed in the end. You have to always do an fopen before you do the fclose. It appears that the buffer will also read a 0.txt file as well as the 1.txt, 2.txt....., n.txt. Should there be a test like an (if buf > &quot;0.txt&quot; && buf < &quot;100.txt&quot continue to process otherwise exit. It appears this would be a good test to include. I just wondered.

Linda