Solved hw2/task3. Everything fine.

hw2/task3/src/lib.rs

@@ -1,3 +1,4 @@
+
 #[cfg(test)]
 mod tests {
     #[test]
@@ -5,14 +6,40 @@ mod tests {
         assert_eq!(2 + 2, 4);
     }
 }
+
 pub struct PascalsTriangle {
     height: u32,
 }
 
 impl PascalsTriangle {
-    pub fn new(i:u32) {
-        height = i;
+    pub fn new(i: u32) -> Self {
+        PascalsTriangle { height: i }
     }
-    pub fn rows() -> Vec<Vec<u32>> {
+    pub fn rows(&self) -> Vec<Vec<u32>> {
+        let rows = self.height as usize;
+        let mut matrix = Vec::with_capacity(rows);
+
+        for line in 0..rows {
+            let current = line as usize;
+            matrix.push(Vec::with_capacity(current + 1));
+            matrix[current].push(1);
+
+            if current > 1 {
+                let previous = current - 1;
+                for index in 1..current {
+                    let add = matrix[previous][index - 1] + matrix[previous][index];
+                    matrix[current].push(add);
+                }
+            }
+
+            if current > 0 {
+                matrix[current].push(1);
+            }
+
+        }
+
+        println!("{:?}", matrix);
+
+        matrix
     }
 }

hw2/task3/src/main.rs

@@ -0,0 +1,7 @@
+extern crate task3;
+use task3::PascalsTriangle;
+
+fn main() {
+    let p = PascalsTriangle::new(10);
+    p.rows();
+}