Talk:Rep-string: Difference between revisions

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 ==Curiouser and curiouser!==
 Ledrugs' Python <tt>text.startswith(shifted_text)</tt> is equivalent to TimToadys' Perl 6 boolean shift and XOR.  I'll remember that! --[[User:Paddy3118|Paddy3118]] ([[User talk:Paddy3118|talk]]) 19:41, 13 May 2013 (UTC)
+== c program ==
+Hi,
+C program works great. I have add new example and it failed ( or I'm wrong). The result IMHO should be   rep-string "001"
+<lang c>
+/*
+https://rosettacode.org/wiki/Rep-string#C
+*/
+#include <stdio.h>
+#include <string.h>
+int repstr(char *str)
+{
+    if (!str) return 0;
+    size_t sl = strlen(str) / 2;
+    while (sl > 0) {
+        if (strstr(str, str + sl) == str)
+            return sl;
+        --sl;
+    }
+    return 0;
+}
+int main(void)
+{
+	// input strings = tests
+    char *strs[] = {
+    "1001110011",
+    "1110111011",
+    "0010010010",
+    "1111111111",
+    "0100101101",
+    "0100100",
+    "101",
+    "11",
+    "00",
+    "00100100100100100100100100100100100100100100100100100100100100100100100100100" }; // not works
+    size_t strslen = sizeof(strs) / sizeof(strs[0]); // number of test values
+    size_t i;
+    for (i = 0; i < strslen; ++i) { // check all test values
+        	int n = repstr(strs[i]);
+        	// print result
+        	if (n)
+        		printf("\"%s\" = rep-string \"%.*s\"\n", strs[i], n, strs[i]);
+        		else printf("\"%s\" = not a rep-string\n", strs[i]);
+    } //
+    return 0;
+}
+</lang>
+{{out}}
+<pre>
+"1001110011" = rep-string "10011"
+"1110111011" = rep-string "1110"
+"0010010010" = rep-string "001"
+"1111111111" = rep-string "11111"
+"0100101101" = not a rep-string
+"0100100" = rep-string "010"
+"101" = not a rep-string
+"11" = rep-string "1"
+"00" = rep-string "0"
+"00100100100100100100100100100100100100100100100100100100100100100100100100100" = rep-string "001001001001001001001001001001001001"
+</pre>