$ rustc CaesarCipher2.rs error: unknown format trait `s` --> CaesarCipher2.rs:20:38 | 20 | println!("{}", format!("Syntax: {0:s} 0-{1:d} e|d", utils::program_name().expect("program name should not be empty!"), alphabetL... | ^ | = note: the only appropriate formatting traits are: - ``, which uses the `Display` trait - `?`, which uses the `Debug` trait - `e`, which uses the `LowerExp` trait - `E`, which uses the `UpperExp` trait - `o`, which uses the `Octal` trait - `p`, which uses the `Pointer` trait - `b`, which uses the `Binary` trait - `x`, which uses the `LowerHex` trait - `X`, which uses the `UpperHex` trait error: unknown format trait `d` --> CaesarCipher2.rs:20:46 | 20 | println!("{}", format!("Syntax: {0:s} 0-{1:d} e|d", utils::program_name().expect("program name should not be empty!"), alphabetL... | ^ | = note: the only appropriate formatting traits are: - ``, which uses the `Display` trait - `?`, which uses the `Debug` trait - `e`, which uses the `LowerExp` trait - `E`, which uses the `UpperExp` trait - `o`, which uses the `Octal` trait - `p`, which uses the `Pointer` trait - `b`, which uses the `Binary` trait - `x`, which uses the `LowerHex` trait - `X`, which uses the `UpperHex` trait error[E0425]: cannot find value `args` in this scope --> CaesarCipher2.rs:19:5 | 19 | if args.len() != 3 { | ^^^^ not found in this scope | help: consider importing this function | 13 + use std::env::args; | error[E0425]: cannot find function `exit` in this scope --> CaesarCipher2.rs:21:3 | 21 | exit(1); | ^^^^ not found in this scope | help: consider importing this function | 13 + use std::process::exit; | error[E0425]: cannot find value `Utils` in this scope --> CaesarCipher2.rs:24:20 | 24 | let shift:isize = Utils.stoiWithDefault(args[1], 0); | ^^^^^ not found in this scope error[E0425]: cannot find value `args` in this scope --> CaesarCipher2.rs:24:42 | 24 | let shift:isize = Utils.stoiWithDefault(args[1], 0); | ^^^^ not found in this scope | help: consider importing this function | 13 + use std::env::args; | error[E0425]: cannot find value `args` in this scope --> CaesarCipher2.rs:25:21 | 25 | let encrypt:bool = args[2] == "e".to_string(); | ^^^^ not found in this scope | help: consider importing this function | 13 + use std::env::args; | error[E0425]: cannot find function `strlen` in this scope --> CaesarCipher2.rs:16:28 | 16 | static alphabetLen:isize = strlen(alphabet); | ^^^^^^ not found in this scope error[E0425]: cannot find function `getcodepoint` in this scope --> CaesarCipher2.rs:28:8 | 28 | while getcodepoint(cp) { | ^^^^^^^^^^^^ not found in this scope error[E0308]: mismatched types --> CaesarCipher2.rs:29:40 | 29 | let mut result:char = char::from_u32(cp); | -------------- ^^ expected `u32`, found `i32` | | | arguments to this function are incorrect | note: associated function defined here --> /opt/local/libexec/rust/src/rustc-1.71.1-src/library/core/src/char/methods.rs:139:18 help: you can convert an `i32` to a `u32` and panic if the converted value doesn't fit | 29 | let mut result:char = char::from_u32(cp.try_into().unwrap()); | ++++++++++++++++++++ error[E0308]: mismatched types --> CaesarCipher2.rs:29:25 | 29 | let mut result:char = char::from_u32(cp); | ---- ^^^^^^^^^^^^^^^^^^ expected `char`, found `Option<char>` | | | expected due to this | = note: expected type `char` found enum `Option<char>` error[E0425]: cannot find function `find` in this scope --> CaesarCipher2.rs:30:23 | 30 | let mut pos:isize = find(alphabet,result); | ^^^^ not found in this scope error[E0425]: cannot find function `putchar` in this scope --> CaesarCipher2.rs:40:3 | 40 | putchar(result); | ^^^^^^^ not found in this scope error: aborting due to 13 previous errors Some errors have detailed explanations: E0308, E0425. For more information about an error, try `rustc --explain E0308`.