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38 lines
729 B
38 lines
729 B
4 years ago
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## changes
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### Instructions
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Define the function `add_excitement` that add the exclamation point at the end of every sentenced that is passed to the function without returning anything but just modifying the input.
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### Expected Functions
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```rust
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fn add_excitement(s: &) {
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}
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```
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### Usage
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Here is an incomplete program to test your function
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```rust
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fn main() {
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let mut a = String::from("Hello");
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println!("the value of `a` before changing {}", a);
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add_excitement(a);
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println!("The value of `a` after changing {}", a);
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}
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```
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And its expected output
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```console
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student@ubuntu:~/[[ROOT]]/test$ cargo run
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the value of `a` before changing Hello
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The value of `a` after changing Hello!
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student@ubuntu:~/[[ROOT]]/test$
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```
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