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weird output

weird output# Programming - 葵花宝典

e*d2007-09-12 07:09

1 楼

void func(void)
{
char *str = (char *) malloc(100);
strcpy(str, “"hello");
free(str);
if(str != NULL)
{
strcpy(str, “"world");
printf("%s\n", str);
}
}
The output is "world" on linux. The freed memory still can be accessed?

d*d2007-09-12 07:09

2 楼

yes.
free means it can be used again. but it won't garantee to be reset to 0.
but it is very very dangerous.

【在 e******d 的大作中提到】

: void func(void)
: {
: char *str = (char *) malloc(100);
: strcpy(str, “"hello");
: free(str);
: if(str != NULL)
: {
: strcpy(str, “"world");
: printf("%s\n", str);
: }