Fix vector print function now frees string representations

2 files changed, 9 insertions, 3 deletions

diff --git a/collections/vector/vector.adoc b/collections/vector/vector.adoc
index e3fa94a..ce91c71 100644
--- a/collections/vector/vector.adoc
+++ b/collections/vector/vector.adoc
@@ -1,7 +1,7 @@
 Vector
 ======
 Tucker Evans
-v0.15, 2020-07-04
+v0.16, 2020-07-04
 
 A basic vector, that hold pointers to your data structures.
 
@@ -112,6 +112,9 @@ brackets and separated by commas ','). +to_string+ is a function that takes a
 pointer to the type of elements stored in +self+ and returns a string
 representation.
 
+NOTE: Strings are freed after printing, therefore +strdup()+ should be used on
+any strings that are not for the sole purpose of printing here.
+
 Examples
 ^^^^^^^^
 [source,c]
@@ -122,7 +125,7 @@ Examples
 char* to_string(str)
 void *str;
 {
-	return str;
+	return strdup(str);
 }
 
 int main()
diff --git a/collections/vector/vector.c b/collections/vector/vector.c
index c456d8a..391b5a6 100644
--- a/collections/vector/vector.c
+++ b/collections/vector/vector.c
@@ -108,10 +108,13 @@ vec *root;
 char* to_string(void*);
 {
 	int i;
+	char *tmp;
 
 	printf("[");
 	for(i = 0; i < root->end; i++) {
-		printf("%s", to_string(vec_index(root, i)));
+		printf("%s", tmp = to_string(vec_index(root, i)));
+		free(tmp);
+		tmp = NULL;
 	}
 	printf("\b]\n");