Data commit

Task/Variable-declaration-reset/C/variable-declaration-reset.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+
+int main() {
+    int i, gprev = 0;
+    int s[7] = {1, 2, 2, 3, 4, 4, 5};
+
+    /* There is no output as 'prev' is created anew each time
+       around the loop and set explicitly to zero. */
+    for (i = 0; i < 7; ++i) {
+//  for (int i = 0, prev; i < 7; ++i) { // as below, see note
+        int curr = s[i];
+        int prev = 0;
+//      int prev; // produces same output as second loop
+        if (i > 0 && curr == prev) printf("%d\n", i);
+        prev = curr;
+    }
+
+    /*  Now 'gprev' is used and reassigned
+        each time around the loop producing the desired output. */
+    for (i = 0; i < 7; ++i) {
+        int curr = s[i];
+        if (i > 0 && curr == gprev) printf("%d\n", i);
+        gprev = curr;
+    }
+
+    return 0;
+}