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    <p>WhozCraig's crystal ball says your problem is in <code>array_create()</code>. Specifically, the field <code>arr</code> is not allocated properly. Your <code>array_create()</code> should look something like this:</p> <pre><code>array_t array_create(int length) { array_t res = {length, NULL}; if (length &gt; 0) { res.arr = malloc(length * sizeof(*res.arr)); if(res.arr == NULL) { printf("malloc(%d) failed\n", length * sizeof(*res.arr)); exit(1); } } return res; } </code></pre> <p>You also need to fix those empty returns. Maybe you just want to print a message and exit.</p> <hr> <p>Update Mon Nov 18 16:13:48 CST 2013</p> <p>This is a whole different version that allocates an array_t from the heap. The error handling is kind of ugly ( all those places that return 0; ). This should work, the other worked too, but maybe an array_t on the heap is what you are looking for.</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; typedef struct { size_t count; int *arr; } array_t; array_t *array_create(size_t count){ array_t *newArr = malloc(sizeof(array_t)); if(newArr == 0) return 0; newArr-&gt;count = count; newArr-&gt;arr = calloc(sizeof(int),count); if(newArr-&gt;arr == 0) return 0; return newArr; } array_t *array_get(FILE* file){ size_t count; array_t *arr; int i = 0; if (!file) return 0; if (!fscanf(file, "%zu", &amp;count)) return 0; arr = array_create(count); if(arr == 0) return 0; for (i = 0; i &lt; arr-&gt;count; i++){ if (!fscanf(file, "%d", &amp;arr-&gt;arr[i])) return 0; } for (i = 0; i&lt;arr-&gt;count; i++) printf("%d ", arr-&gt;arr[i]); printf("\n"); return arr; } int main(void) { array_t *arr; int i = 0; arr = array_get(stdin); if(arr == 0) return -1; for (i = 0; i&lt;arr-&gt;count; i++) printf("%d ", arr-&gt;arr[i]); getch(); // getch is windows return 0; } </code></pre>
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    1. COWe *have* to post a version that works. We can't just say *that* (though I chuckled when I saw it pop up, to be sure).
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    2. COI'll delete if you want... I had 'balls' plural my mistake. That sounded kinda iffy.
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    3. COLike in: `my balls feel like a pair of maraka's` ?
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