Sum of factorials

.gitignore

@@ -1,4 +1,10 @@
 # Generated by Cargo
+# Ignore all
+/src/bin/*
+
+# Unignore all with extensions
+!/src/bin/*.*
+
 # will have compiled files and executables
 /target/
 

src/bin/34.rs

@@ -0,0 +1,46 @@
+//145 is an interesting number, as 1! + 4! + 5! = 1 + 24 + 120 = 145.
+//Find the sum of all numbers which are equal to the sum of the factorial of their digits.
+//Note: as 1! = 1 and 2! = 2 are not sums they are not included.
+
+#[warn(unused_imports)]
+fn factorial_function(num: i32) -> i32 {
+    match num {
+        0 => 1,
+        _ => num * factorial_function(num - 1)
+    }
+}
+
+fn compute_sum(a: i32, b: i32) -> i32 {
+   let mut total = 0;
+   for i in a..b {
+        let mut sum = 0;
+        let x = i.to_string();
+        for y in x.chars(){
+           let z = (y.to_string()).parse::<i32>().unwrap(); 
+           sum += factorial_function(z);
+        }
+
+        if i == sum {
+           total +=sum;
+        }
+    }
+    return total;
+}
+
+fn main() {
+    let start: i32 = 0;
+    let end: i32 = 1_000_000; 
+    let result = compute_sum(start, end); 
+    println!("Sum of all numbers : {}", result);
+}
+
+#[test]
+fn test_factorial() {
+    assert_eq!(factorial_function(3), 6);
+}
+
+#[test]
+fn test_compute_sum(){
+    assert_eq!(compute_sum(3, 1000), 145);
+}
+