Hi guys,
This is my first email in this list, any help is much appreciated.
As I know, it's not allowed to pass a local variable to a function,
because the stack where local variable resides will be reused by other
functions.
eg:
1 #include <stdio.h>
2
3 char *fetch();
4
5 int main(int argc, char *argv[]){
6 char *string;
7 string = fetch();
8 printf("%s\n", string);
9 exit(0);
10 }
11
12 char *fetch(){
13 char string[10];
14 scanf("%s", string);
15 return string;
16 }
When the application is executed, after input "a", it will produce
unknown characters, like "8Šè¿ôÿO". Which is like what I expect
However, if I change line 13 to:
13 char string[1024];
When I type "a", it echos "a", which is out of my expectation
Why does it behave like this?
Thanks in advance,
longapple
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