p69

Author: ian-hon

src/p69.rs

@@ -0,0 +1,17 @@
+pub fn run() {
+    println!("{}", my_sqrt(2147395600));
+//     for i in 0..15 {
+//         println!("{i} {}", my_sqrt(i));
+//     }
+}
+
+pub fn my_sqrt(x: i32) -> i32 {
+    let mut i: i64 = 0;
+    let x: i64 = (x as i64) + 1;
+    loop {
+        if (i * i) >= x {
+            return (i - 1) as i32;
+        }
+        i += 1;
+    }
+}