Pure Programmer
Project: CurrentTimeMilliseconds
Often it is necessary to time how long a section of code takes to execute to get useful information for optimization. Write a program that computes squares between 1 and 10,000 and prints them. Time how long it takes to perform this function to milliseconds resolution.
Output
$ rustc CurrentTimeMilliseconds.rs
error: unknown format trait `d`
--> CurrentTimeMilliseconds.rs:12:31
|
12 | println!("{}", format!("{0:d}^2 = {1:d}", x, x * x));
| ^
|
= 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`
--> CurrentTimeMilliseconds.rs:12:41
|
12 | println!("{}", format!("{0:d}^2 = {1:d}", x, x * x));
| ^
|
= 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`
--> CurrentTimeMilliseconds.rs:17:39
|
17 | println!("{}", format!("Duration: {0:d} ms", stop - start));
| ^
|
= 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 function `clock_millis` in this scope
--> CurrentTimeMilliseconds.rs:8:22
|
8 | let mut start:i64 = clock_millis();
| ^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `clock_millis` in this scope
--> CurrentTimeMilliseconds.rs:16:21
|
16 | let mut stop:i64 = clock_millis();
| ^^^^^^^^^^^^ not found in this scope
error: aborting due to 5 previous errors
For more information about this error, try `rustc --explain E0425`.