feat: add array3.rs exercise

exercises/array/array3.rs

@@ -0,0 +1,31 @@
+// array3.rs
+//
+// Here is the code for how the array learns
+
+// I AM NOT DONE
+
+
+
+struct soultion;
+
+impl soultion{
+    pub fn move_zero(nums:&mut Vec<i32>){
+        let mut i=0;
+        for j in 0..nums.len(){
+            if nums[j] !=0{
+                nums[i] = nums[j];
+                i+=1;
+            }
+        }
+        // for loop through
+      for k in i ..nums.len(){
+       nums[k] = 0;
+      }
+    }
+}
+
+fn main() {
+    let mut v = vec![1,23,0,0,0,3,4,5];
+    soultion::move_zero( &mut v);
+    println!("v:{:?}",v);
+}