22 lines
548 B
Rust
22 lines
548 B
Rust
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// This code is editable and runnable!
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fn main() {
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// A simple integer calculator:
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// `+` or `-` means add or subtract by 1
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// `*` or `/` means multiply or divide by 2
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let program = "+ + * - /";
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let mut accumulator = 0;
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for token in program.chars() {
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match token {
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'+' => accumulator += 1,
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'-' => accumulator -= 1,
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'*' => accumulator *= 2,
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'/' => accumulator /= 2,
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_ => { /* ignore everything else */ }
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}
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}
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assert_eq!(accumulator, 1);
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}
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