Re: sprintf function
From: Martin Ambuhl (mambuhl_at_earthlink.net)
Date: 02/08/04
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Date: Sun, 08 Feb 2004 20:52:41 GMT
Earth wrote:
...
> I have written a testing program to try the sprintf fuction and expect
> the output is 1.234. However, the output shows nothing.
...
> #include <stdio.h>
> char* toString(double d)
> {
> char buffer[9];
> sprintf(buffer, "%lf", d);
> return buffer;
> }
>
> main()
> {
> printf("%s\n", toString(1.234));
> }
But this code ...
#include <stdio.h>
char *toString(double d)
{
static char buffer[9];
sprintf(buffer, "%lf", d);
return buffer;
}
int main(void)
{
printf("%s\n", toString(1.234));
return 0;
}
Has this output:
1.234000
Notice the difference?
-- Martin Ambuhl
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