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use std::env;
fn running_sum(array: &Vec<i32>) -> Vec<i32> {
let mut sum = Vec::new();
sum.push(array[0]);
for i in 1..array.len() {
sum.push(array[i] + sum[i - 1]);
}
sum
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_running_sum() {
let test_cases = vec![
(vec![1, 2, 3, 4, 5], vec![1, 3, 6, 10, 15]),
(vec![1, 1, 1, 1, 1], vec![1, 2, 3, 4, 5]),
(vec![0, -1, 1, 2], vec![0, -1, 0, 2]),
];
for (input, want) in test_cases {
let got = running_sum(&input);
assert_eq!(got, want);
}
}
}
fn main() {
// Get command-line arguments, excluding the program name
let args: Vec<String> = env::args().collect();
// Create a Vec<i32> by parsing the command-line arguments
let in_vec: Vec<i32> = args
.iter()
.skip(1) // Skip the first argument, which is the program name
.filter_map(|arg| arg.parse().ok())
.collect();
// Print the resulting Vec<i32>
let out_vec: Vec<i32> = running_sum(&in_vec);
println!(" Input: {:?}", in_vec);
println!("Running Sum: {:?}", out_vec);
}
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