Update the test of the exercise `temperature_conv`

rust/tests/temperature_conv_test/src/main.rs

@@ -8,13 +8,20 @@ fn eql(a: f64, b: f64) -> bool {
 
 #[test]
 fn test_f_to_c() {
-	println!("{}", fahrenheit_to_celsius(83.0));
-	assert!(eql(fahrenheit_to_celsius(20.0), -6.666666666666666));
-	assert!(eql(fahrenheit_to_celsius(83.0), 28.333333333333332));
+	let temp_f = 20.0;
+	println!("{}°F = {}°C", temp_f, fahrenheit_to_celsius(temp_f));
+	assert!(eql(fahrenheit_to_celsius(temp_f), -6.666666666666666));
+	let temp_f = 83.0;
+	println!("{}°F = {}°C", temp_f, fahrenheit_to_celsius(temp_f));
+	assert!(eql(fahrenheit_to_celsius(temp_f), 28.333333333333332));
 }
 
 #[test]
 fn test_c_to_f() {
+	let temp_c = 27.0;
+	println!("{}°C = {}°F", temp_c, fahrenheit_to_celsius(temp_c));
 	assert!(eql(celsius_to_fahrenheit(27.0), 80.6));
-	assert!(eql(celsius_to_fahrenheit(0.0), 32.0))
+	let temp_c = 0.0;
+	println!("{}°C = {}°F", temp_c, fahrenheit_to_celsius(temp_c));
+	assert!(eql(celsius_to_fahrenheit(temp_c), 32.0))
 }