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POC - join arrays
 

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  1. POC - join arrays
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    <p>why can't i use Join? it doesn't have the 4 (e) from set B... why?</p> <pre> #include &lt;stdio.h&gt; #define SIZEOF_A 6 #define SIZEOF_B 6 typedef enum { a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z } set; void dispSet(set numbers[], int size_numbers) { int i; printf("[ "); for (i = 0; i &lt; size_numbers-1; i++) { printf("%d, ", numbers[i]); } printf("%d ]", numbers[size_numbers-1]); printf("\n"); } int in_arr(int A, set B[], int B_size) { int res = 0; int counter; for (counter = 0; counter &lt; B_size; counter++) { if (A == B[counter]) { res = 1; break; } } return res; } int arr_in_arr(set smaller[], int smaller_size, set bigger[], int bigger_size) { int res = 1; int counter; for (counter = 0; counter &lt; smaller_size; counter++) { if (in_arr(smaller[counter], bigger, bigger_size)) { continue; } else { res = 0; break; } } return res; } int size_c(set arr1[], int arr1_size, set arr2[], int arr2_size) { int i; int newsize = 0; for (i = 0; i &lt; arr1_size; i++) { if (!in_arr(arr1[i], arr2, arr2_size)) { newsize++; } } for (i = 0; i &lt; arr2_size; i++) newsize++; printf("\nSIZE OF C: %d\n", newsize); return newsize; } int Join(set arr1[], int arr1_size, set arr2[], int arr2_size, set arr3[], int arr3_size) { int i, j; for (i = 0; i &lt; arr1_size; i++) { arr3[i] = arr1[i]; } for (i = 0; i &lt; arr2_size; i++) { j = i+arr2_size; if (!in_arr(arr2[i], arr3, arr3_size)) { arr3[j] = arr2[i]; } } } int main () { set A[SIZEOF_A] = {c, d, f, a, b, j}; set B[SIZEOF_B] = {a, b, c, d, e, f}; int SIZEOF_C = size_c(A, SIZEOF_A, B, SIZEOF_B); int counter; printf("For the sets,\n"); printf("A: "); dispSet(A, SIZEOF_A); printf("B: "); dispSet(B, SIZEOF_B); printf("C: "); set C[SIZEOF_C]; Join(A, SIZEOF_A, B, SIZEOF_B, C, SIZEOF_C); dispSet(C, SIZEOF_C); printf("%s\n", (arr_in_arr(A, SIZEOF_A, B, SIZEOF_B) == 1)?"B contains A":"B does not contain A"); } </pre>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. CODidn't look further than `in_arr`. You are missing the initialization for `res`.
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    2. COokay i added the initialization, compiled, and all that changed was the addition of `0` to `C`
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    3. COplease turn on warnings on your compiler and fix what it reports. Edit this when you've fixed them (for example, `res` is not initialized in `in_arr` if the value is not found, `printf("", smaller[counter]);` isn't valid)
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      1. USMat
 

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