update numbers

en/src/SUMMARY.md

@@ -2,7 +2,7 @@
 
 - [About Exercise.rs](why-exercise.md)
 - [Variables](variables.md)
-- [Basic Types todo](basic-types/intro.md)
+- [Basic Types](basic-types/intro.md)
   - [Numbers](basic-types/numbers.md)
   - [Char, Bool and Unit](basic-types/char-bool-unit.md)
   - [Statements and Expressions](basic-types/statements-expressions.md)

en/src/basic-types/intro.md

@@ -1 +1,5 @@
 # Basic Types
+Learning resources: 
+- English: [Rust Book 3.2 and 3.3](https://doc.rust-lang.org/book/ch03-02-data-types.html)
+- 简体中文: [Rust语言圣经 - 基本类型](https://course.rs/basic/base-type/index.html)
+

en/src/basic-types/numbers.md

@@ -1 +1,86 @@
 # Numbers
+
+### Integer
+
+🌟 remove something to make it work
+
+> Tips: If we don't explicitly give one type to a varible, then the compiler will infer one for us
+```rust,editable
+
+fn main() {
+    let x: i32 = 5;
+    let mut y: u32 = 5;
+
+    y = x;
+    
+    let z = 10; // type of z ? 
+}
+```
+
+
+🌟🌟🌟  modify `assert_eq!` to make it work
+
+> Tips: If we don't explicitly give one type to a varible, then the compiler will infer one for us
+
+```rust,editable
+
+fn main() {
+    let x = 5;
+    assert_eq!("u32".to_string(), type_of(&x));
+}
+
+// get the type of given variable, return a string representation of the type  , e.g "i8", "u8", "i32", "u32"
+fn type_of<T>(_: &T) -> String {
+    format!("{}", std::any::type_name::<T>())
+}
+```
+
+🌟🌟 fill the blanks to make it work
+```rust,editable
+
+fn main() {
+    assert_eq!(i8::MAX, __); 
+    assert_eq!(u8::MAX, __); 
+}
+```
+
+🌟🌟 fix errors and panics to make it work
+```rust,editable
+
+fn main() {
+   let v1 = 251_u8 + 8;
+   let v2 = i8::checked_add(251, 8).unwrap();
+   println!("{},{}",v1,v2);
+}
+```
+
+🌟🌟🌟 modify `assert!` to make it work
+```rust,editable
+
+fn main() {
+    let v = 1_024 + 0xff + 0o77 + 0b1111_1111;
+    assert!(v == 1579);
+}
+```
+
+### Floating-Point
+🌟 replace ? with your answer
+
+```rust,editable
+
+fn main() {
+    let x = 1_000.000_1; // ?
+    let y: f32 = 0.12; // f32
+    let z = 0.01_f64; // f64
+}
+```
+🌟🌟🌟 use two ways to make it work
+
+> Tips: 1. abs 2. f32
+
+```rust,editable
+
+fn main() {
+    assert!(0.1+0.2==0.3);
+}
+```

en/src/variables.md

@@ -1,7 +1,7 @@
 # Variables
 
 ### Binding and mutablity
-🌟 fix the error below with least change
+🌟 fix the error below with least modifying
 ```rust,editable
 
 fn main() {
@@ -24,7 +24,7 @@ fn main() {
 ```
 
 ### Scope
-🌟 fix the error below with least change
+🌟 fix the error below with least modifying
 ```rust,editable
 
 fn main() {
@@ -50,7 +50,7 @@ fn define_x() {
 ```
 
 ### Shadowing
-🌟🌟 only change `assert_eq!` to make the `println!` work(print `42` in terminal)
+🌟🌟 only modify `assert_eq!` to make the `println!` work(print `42` in terminal)
 
 ```rust,editable
 
@@ -103,7 +103,7 @@ fn main() {
 ```
 
 ### Destructing
-🌟🌟 fix the error below with least change
+🌟🌟 fix the error below with least modifying
 
 > Tips: you can use Shadowing or Mutability
 

zh-CN/src/SUMMARY.md

@@ -2,7 +2,7 @@
 
 - [关于 exercise.rs](why-exercise.md)
 - [变量绑定与解构](variables.md)
-- [基本类型 todo](basic-types/intro.md)
+- [基本类型](basic-types/intro.md)
   - [数值类型](basic-types/numbers.md)
   - [字符、布尔、单元类型](basic-types/char-bool-unit.md)
   - [语句与表达式](basic-types/statements-expressions.md)

zh-CN/src/basic-types/intro.md

@@ -1 +1,5 @@
-# Basic Types
+# 基本类型
+学习资料: 
+- English: [Rust Book 3.2 and 3.3](https://doc.rust-lang.org/book/ch03-02-data-types.html)
+- 简体中文: [Rust语言圣经 - 基本类型](https://course.rs/basic/base-type/index.html)
+

zh-CN/src/circle-refer

@@ -1 +0,0 @@
-# Weak and Circle reference

zh-CN/src/crate

@@ -1 +0,0 @@
-# Crate

zh-CN/src/resu

@@ -1 +0,0 @@
-# panic!