Changed options structure and added verbose option.
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parent
efe9ec5b3b
commit
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34
src/main.rs
34
src/main.rs
@ -16,17 +16,33 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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use std::env;
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//use std::env;
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use structopt::StructOpt;
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use std::path::PathBuf;
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use std::collections::VecDeque;
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#[derive(StructOpt)]
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struct Opt {
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#[structopt(short, long)]
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verbose:bool,
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//#[structopt(short, long)]
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//import:Option<PathBuf>,
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n:usize,
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}
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fn main() {
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let args:Vec<String> = env::args().collect();
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//let args:Vec<String> = env::args().collect();
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let opts = Opt::from_args();
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// get the first `n` primes
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let n:usize = args[1].parse().unwrap();
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//let n:usize = args[1].parse().unwrap();
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let n = opts.n;
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let mut primes:VecDeque<u64> = VecDeque::with_capacity(n);
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// first prime
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println!("{}", 2);
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if opts.verbose
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{
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println!("{}", 2);
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}
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primes.push_back(2);
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let mut candidate:u64 = 3;
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@ -46,9 +62,17 @@ fn main() {
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if is_prime
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{
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println!("{}", candidate);
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if opts.verbose
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{
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println!("{}", candidate);
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}
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primes.push_back(candidate);
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}
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candidate += 2;
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}
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if !opts.verbose
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{
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println!("{}", primes.back().unwrap());
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}
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}
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