fix(lib|main): fix format

src/lib.rs

@@ -8,14 +8,17 @@ pub mod parser;
 pub mod maths;
 
 
-pub fn format(v: &Vec<GaussianRational>) -> String {
+pub fn format(v: &[GaussianRational]) -> String {
     let mut format;
     format = v[0].format(false);
     if v.len() > 1 {
+    let mut format2 = v[1].format(true);
+    if format2 == "" {
         if format == "" {
-            format = format!("{}x", v[1].format(true));
+            format = format!("{}x", format2);
         } else {
-            format = format!("{format} + {}x", v[1].format(true));
+            format = format!("{format} + {}x", format2);
+        }
     }
     }
     for i in 2..v.len() {
@@ -41,7 +44,7 @@ pub fn parse(query: &str) -> Result<Node, Box<dyn Error>> {
     Ok(ast)
 }
 
-fn print_reduced_form(equation: &Vec<f64>) {
+fn print_reduced_form(equation: &[f64]) {
     let mut string = String::from("Reduced form: ");
 
     for (i, n) in equation.iter().enumerate() {

src/main.rs

@@ -17,7 +17,11 @@ fn main() {
         process::exit(1);
     });
     if is_equation {
-        println!("{} = 0", computorv1::format(&evaluated));
+        let mut format = computorv1::format(&evaluated);
+        if format == "" {
+            format = String::from("0");
+        }
+        println!("{} = 0", format);
         computorv1::maths::solver::solve(evaluated);
     } else {
         println!("{} is equal to:", args[1]);