Create ConvertFahrenheitToCelsius.rs

program/program/convert-fahrenheit-to-celsius/ConvertFahrenheitToCelsius.rs

@@ -0,0 +1,29 @@
+// Rust function to convert fahrenheit to celsius
+
+use std::io;
+
+fn convert_fahrenheit_to_celsius(fahrin: &str) -> String{
+
+    	let fahrin: f32 = fahrin.trim().parse().expect("Must enter a temperature °C");
+    	let celsius = ((fahrin - 32.0) * 5.0) / 9.0;
+
+	let celout = format!("{}", celsius);
+	return celout;
+}
+
+fn main(){
+	// the input string and this main function can be removed. This is simply for testing
+
+	println!("Enter the temperature in fharenheit");
+  	let mut fahrenheit = String::new();	
+	let _rtn = io::stdin().read_line(&mut fahrenheit);	
+
+	let celsius = convert_fahrenheit_to_celsius(&fahrenheit);
+
+	// print out the results of the conversion.
+	let len = fahrenheit.len();
+	fahrenheit.truncate(len - 1);
+	println!();
+	println!("{}°F is {}°C", fahrenheit, celsius);
+
+}

program/program/print-inverted-pyramid-pattern/print_inverted_pyramid_pattern.rs

@@ -0,0 +1,39 @@
+//  	Rust function to print an inverted pyramid pattern
+//Example:
+//  Input   : 5
+//  Output : 
+//	1 2 3 4 5
+//	1 2 3 4 
+//	1 2 3
+//	1 2
+//	1
+
+use std::io;
+
+fn print_inverted_triangle(n: u32) {
+
+    let mut limit = n+1;
+
+    for _i in 1 .. n+1 {
+
+        for j in 1 .. limit {
+            print!("{} ", j);
+        }
+
+	limit = limit - 1;
+        println!();
+    }
+}
+
+fn main() {
+
+	// the input string and this main function can be removed. This is simply for testing
+
+	println!("Enter the number of levels to print");
+	let mut input_num = String::new();
+	let _rtrn = io::stdin().read_line(&mut input_num);
+	let n: u32 = input_num.trim().parse().expect("Input not an integer");	
+
+	// example of how to call the function and print out the results of the inverted pyramid.
+    	print_inverted_triangle(n);
+}