[c_book] ex-2-5-any

c_book/2-ch/exercises/ex-2-5-any.c

@@ -0,0 +1,35 @@
+#include<stdio.h>
+#define MAX 100
+
+/*
+ * int any(char[] s1, char[] s2) 
+ * returns first location in s1 
+ * where any char of s2 is found 
+ * retunrs -1 if nothing is found
+ * */
+
+int any(char[], char[]);
+int any(char s1[], char s2[]) 
+{
+  int i = 0, k, loc = -1;
+
+  while (loc < 0 && s1[i] != '\0') {
+    for (k = 0; s2[k] != '\0'; ++k) {
+      if (s1[i] == s2[k]) loc = i;
+    }
+    ++i;
+  }
+
+  return loc;
+}
+
+int main(void)
+{
+
+  printf("%d\n", any("lol", "abc")); // -1
+  printf("%d\n", any("lol", "al")); // 0
+  printf("%d\n", any("ol", "al")); // 1
+  printf("%d\n", any("abcde", "xyze")); // 4
+
+  return 0;
+}