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- fn largest(list: &[i32]) -> Option<i32> {
- if list.is_empty() {
- return None;
- }
- let mut largest = list[0];
- for &item in list.iter() {
- if item > largest {
- largest = item;;
- }
- }
- Some(largest)
- }
- fn main() {
- let number_list = vec![34, 50, 25, 100, 65];
- let result = largest(&number_list);
- println!("The largest number is {:?}", result);
- let number_list = vec![102, 34, 6000, 89, 54, 2, 43, 8];
- let result = largest(&number_list);
- println!("The largest number is {:?}", result);
- let number_list = vec![];
- let result = largest(&number_list);
- println!("The largest number is {:?}", result);
- }
- /*
- fn main() {
- let number_list:Vec<i32> = vec![];
- let mut largest:Option<&i32> = number_list.get(0);
- for number in number_list {
- if number > *largest.unwrap() {
- largest = Some(&number);
- }/*
- if number > largest {
- largest=number;
- }*/
- }
- println!("The largest number is {:?}", largest);
- }*/
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