Data commit

Task/Stack/V-(Vlang)/stack.v

@@ -0,0 +1,52 @@
+const (
+    max_depth = 256
+)
+
+struct Stack {
+mut:
+    data  []f32 = []f32{len: max_depth}
+    depth int
+}
+
+fn (mut s Stack) push(v f32) {
+    if s.depth >= max_depth {
+        return
+    }
+    println('Push: ${v:3.2f}')
+    s.data[s.depth] = v
+    s.depth++
+}
+
+fn (mut s Stack) pop() ?f32 {
+    if s.depth > 0 {
+        s.depth--
+        result := s.data[s.depth]
+        println('Pop: top of stack was ${result:3.2f}')
+        return result
+    }
+    return error('Stack Underflow!!')
+}
+
+fn (s Stack) peek() ?f32 {
+    if s.depth > 0 {
+        result := s.data[s.depth - 1]
+        println('Peek: top of stack is ${result:3.2f}')
+        return result
+    }
+    return error('Out of Bounds...')
+}
+
+fn (s Stack) empty() bool {
+    return s.depth == 0
+}
+
+fn main() {
+    mut stack := Stack{}
+    println('Stack is empty? ' + if stack.empty() { 'Yes' } else { 'No' })
+    stack.push(5.0)
+    stack.push(4.2)
+    println('Stack is empty? ' + if stack.empty() { 'Yes' } else { 'No' })
+    stack.peek() or { return }
+    stack.pop() or { return }
+    stack.pop() or { return }
+}