# Compiling and running cairo files
```
cargo run --bin cairo-run -- --single-file /path/to/file.cairo
```
If we want to run code that is gas tested:
```
cargo run --bin cairo-run -- --single-file /path/to/file.cairo --available-gas 200
```
We currently only run the `main` function with no arguments besides implicits.
# Example
```
// Calculates fib...
fn main() -> u128 {
fib(1_u128, 1_u128, 100_u128)
}
fn fib(a: u128, b: u128, n: u128) -> u128 {
if n == 0 {
a
} else {
fib(b, a + b, n - 1_u128)
}
}
```
# Command-Line Options
- `--single-file` - Treat the path as a single file instead of a project directory.
- `--available-gas <amount>` - Set the amount of gas available for execution.
- `--print-full-memory` - Print the full memory state after execution.
- `--allow-warnings` - Allow the compilation to succeed even with warnings.
- `--run-profiler` - Run the profiler and display profiling information.
# Additional Information
- When compiling with --available-gas, if there are cycles in the code, calls to
`withdraw_gas_all` will be automatically added.
- Functions with calls to `withdraw_gas_all` will not compile without `--available-gas` value.
- Functions without calls to `withdraw_gas_all` will not compile with `--available-gas` value.
- When running functions returning arrays `--print-full-memory` should probably be used,
to actually see the values contained in the array.