first version for blog

heap-program/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "heap-program"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+dhat = "0.3.0"
+
+[features]
+dhat-heap = []    # if you are doing heap profiling

heap-program/src/main.rs

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+use std::io::{self, Read};
+
+fn stdin_boxed_str() -> Box<str> {
+    let mut buff = [0; 10];
+    let mut stdin = io::stdin(); // We get `Stdin` here.
+    stdin.read(&mut buff).unwrap();
+    let s = std::str::from_utf8(&buff).unwrap();
+
+    s.into()
+}
+
+fn stdin_string() -> String {
+    let mut buff = String::new();
+    std::io::stdin().read_line(&mut buff).unwrap();
+
+    buff
+}
+
+fn my_simple_program(a: i32) -> i32 {
+    let b = 10;
+    a + b
+}
+
+
+fn main() {
+    println!("{}", my_simple_program(5));
+
+    let boxed_str = stdin_boxed_str();
+
+    println!("boxed_str: {}", boxed_str);
+
+    let stdin_str = stdin_string();
+
+    println!("stdin_str: {}", stdin_str);
+}