CS代考计算机代写 data structure Carnegie Mellon

Carnegie Mellon
Referencing Nonexistent Variables
 Forgetting that local variables disappear when a function returns
int *foo () {
int val;
return &val;
}
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Carnegie Mellon
Freeing Blocks Multiple Times  Nasty!
x = malloc(N*sizeof(int));
free(x);
y = malloc(M*sizeof(int));
free(x);
2

Carnegie Mellon
Referencing Freed Blocks  Evil!
x = malloc(N*sizeof(int));

free(x); …
y = malloc(M*sizeof(int));
for (i=0; ival = 0;
head->next = NULL;

}
…
free(head);
return;
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