fix base use

exercises/00_intro/intro2.rs

@@ -1,4 +1,4 @@
 fn main() {
     // TODO: Fix the code to print "Hello world!".
-    printline!("Hello world!");
+    println!("Hello world!");
 }

exercises/01_variables/variables1.rs

@@ -1,6 +1,6 @@
 fn main() {
     // TODO: Add missing keyword.
-    x = 5;
+    let x: i32 = 5;
 
     println!("x has the value {x}");
 }

exercises/01_variables/variables2.rs

@@ -1,6 +1,6 @@
 fn main() {
     // TODO: Change the line below to fix the compiler error.
-    let x;
+    let x: i32 = 10;
 
     if x == 10 {
         println!("x is ten!");

exercises/01_variables/variables3.rs

@@ -1,6 +1,6 @@
 fn main() {
     // TODO: Change the line below to fix the compiler error.
-    let x: i32;
+    let x: i32 = 10;
 
     println!("Number {x}");
 }

exercises/01_variables/variables4.rs

@@ -1,6 +1,6 @@
 // TODO: Fix the compiler error.
 fn main() {
-    let x = 3;
+    let mut x: i32 = 3;
     println!("Number {x}");
 
     x = 5; // Don't change this line

exercises/01_variables/variables5.rs

@@ -3,6 +3,6 @@ fn main() {
     println!("Spell a number: {}", number);
 
     // TODO: Fix the compiler error by changing the line below without renaming the variable.
-    number = 3;
+    let number = 3;
     println!("Number plus two is: {}", number + 2);
 }

exercises/01_variables/variables6.rs

@@ -1,5 +1,5 @@
 // TODO: Change the line below to fix the compiler error.
-const NUMBER = 3;
+const NUMBER: i32 = 3;
 
 fn main() {
     println!("Number: {NUMBER}");

exercises/02_functions/functions1.rs

@@ -3,3 +3,5 @@
 fn main() {
     call_me(); // Don't change this line
 }
+
+fn call_me(){}

exercises/02_functions/functions2.rs

@@ -1,5 +1,5 @@
 // TODO: Add the missing type of the argument `num` after the colon `:`.
-fn call_me(num:) {
+fn call_me(num: i32) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }

exercises/02_functions/functions3.rs

@@ -6,5 +6,5 @@ fn call_me(num: u32) {
 
 fn main() {
     // TODO: Fix the function call.
-    call_me();
+    call_me(3);
 }

exercises/02_functions/functions4.rs

@@ -8,7 +8,7 @@ fn is_even(num: i64) -> bool {
 }
 
 // TODO: Fix the function signature.
-fn sale_price(price: i64) -> {
+fn sale_price(price: i64) -> i64 {
     if is_even(price) {
         price - 10
     } else {

exercises/02_functions/functions5.rs

@@ -1,6 +1,6 @@
 // TODO: Fix the function body without changing the signature.
 fn square(num: i32) -> i32 {
-    num * num;
+    num * num
 }
 
 fn main() {

exercises/03_if/if1.rs

@@ -4,6 +4,7 @@ fn bigger(a: i32, b: i32) -> i32 {
     // Do not use:
     // - another function call
     // - additional variables
+    if a > b { a } else { b }
 }
 
 fn main() {

exercises/03_if/if2.rs

@@ -2,8 +2,10 @@
 fn foo_if_fizz(fizzish: &str) -> &str {
     if fizzish == "fizz" {
         "foo"
+    } else if fizzish == "fuzz" {
+        "bar"
     } else {
-        1
+        "baz"
     }
 }
 

exercises/03_if/if3.rs

@@ -3,11 +3,11 @@ fn animal_habitat(animal: &str) -> &str {
     let identifier = if animal == "crab" {
         1
     } else if animal == "gopher" {
-        2.0
+        2
     } else if animal == "snake" {
         3
     } else {
-        "Unknown"
+        4
     };
 
     // Don't change the expression below!