I want to open few files using a for loop so i did:
for(f=1;f<=3;f++)
{
str1="itoa(f)";
str2="c:\\test";
str3=".txt";
strcat(str2,str1);
strcat(str2,str3); // str=c:\\test1.txt, c:\\test2.txt
fp= fopen(str2,"r");
if(fp==NULL)
{
printf("\n\ncannot open file\n");
exit();
}
This program gives a lot of errors saying left operand must have a L-value .
please hep.
Thaning you in advance.
Himanshu
what are these mythical str1, str2, str3? are they properly initialized? are they null-terminated?
you can also do this quicker with sprintf btw.
A few of these lines leave me wondering...
str1="itoa(f)";
Quzah.
Hope is the first step on the road to disappointment.
hmm yeah, i dont use itoa() so that's why i said use sprintf insteadOriginally posted by quzah
A few of these lines leave me wondering...
str1="itoa(f)";
Quzah.
looking it up it's not a guaranteed function, although my libc happens to have one, but it takes 3 args and not one
unregistered: instead of saying "a lot of errors" maybe you could actually read the errors and use your brain to process them? (or even just post them here)
Don't they have something to join file names like splitpath was used to seperate them?
I haven't used a compiler in ages, so please be gentle as I try to reacclimate myself. :P
but this isnt seperating a filename into its path and stuff. anyway unregistered here's code i used in a recent program to do this sort of thing:Originally posted by ronin
Don't they have something to join file names like splitpath was used to seperate them?
Code:/* snip */ int i; char filenom[16]; FILE *f; /* snip */ for (i = 0; i < 97; i++) { /* snip */ sprintf (filenom, "samp%3i.wav", i + 1); f = fopen (filenom, "wb); /* snip */ fclose (f); } /* snip */
hello, internet!
Thanks moi it worked !!
You missed the point. 'itoa()' was in quotes, as such, it's just a string. Look at that line again:Originally posted by moi
hmm yeah, i dont use itoa() so that's why i said use sprintf instead
looking it up it's not a guaranteed function, although my libc happens to have one, but it takes 3 args and not one
unregistered: instead of saying "a lot of errors" maybe you could actually read the errors and use your brain to process them? (or even just post them here)
str1="itoa(f)";
Now do you see what I was talking about?
Quzah.
Hope is the first step on the road to disappointment.
... and along the lines of variable types, we don't know what str1, str2 and str3 are defined as.
If they were pointers, then this:
str1="itoa(f)";
str2="c:\\test";
strcat(str2,str1);
is wrong.
If they were arrays, then this:
str1="itoa(f)";
str2="c:\\test";
strcat(str2,str1);
is wrong.
Confusion reigns
When all else fails, read the instructions.
If you're posting code, use code tags: [code] /* insert code here */ [/code]
/me does a double takeOriginally posted by quzah
You missed the point. 'itoa()' was in quotes, as such, it's just a string. Look at that line again:
str1="itoa(f)";
Now do you see what I was talking about?
Quzah.
oopsie
hello, internet!
