q344

Author: OhBonsai

double-pointer/src/q344.rs

@@ -0,0 +1,32 @@
+struct Solution ();
+impl Solution {
+    pub fn reverse_string(s: &mut Vec<char>) {
+
+        let mut l = 0;
+        let mut r = s.len() - 1;
+        let mut tmp = '0';
+
+        while l < r {
+            tmp = s[l];
+            s[l] = s[r];
+            s[r] = tmp;
+
+            l += 1;
+            r -= 1;
+        }
+
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test] fn test_1() {
+        let mut v = vec!['h','e','l','l','o'];
+        Solution::reverse_string(& mut v );
+        assert_eq!(v, vec!['o','l','l','e','h'])
+    }
+
+
+}