Solved conflict. Pipe working.

hw6/task1/src/main.rs

 
 use nix::unistd::{fork, getpid, pipe, read, write};
 use nix::sys::wait::wait;
+use std::str;
 use nix::sys::wait::WaitStatus;
 use nix::unistd::ForkResult::{Child, Parent};
 
 fn main() {
 
- let arguments: Vec<String> = args().collect();
+    let arguments: Vec<String> = args().collect();
 
     if arguments.len() > 2 {
+
         let (reader, writer) = pipe().unwrap();
         let msg = "hello from parent";
         let pid = fork();
 }
 
 /// Concats the two given String *references* and returns them as a String.
-fn concatenate_strings<'a>(s1:&'a str, s2:&'a str) -> String {
+fn concatenate_strings<'a>(s1: &'a str, s2: &'a str) -> String {
     s1.to_string() + s2
 }
 
-/// Splits the given String *reference* and returns it as Vector of Strings.
-fn split_into_strings<'a>(s1:&'a str) -> Vec<String> {
+/// Splits the given String reference and returns it as Vector.
+/*fn split_into_strings<'2>(s1:&'a str) -> Vec<&'a str> {
     s1.to_string().split_whitespace().collect()
+}*/
+/// Calculates the sum of the given Strings and returns them as a Result.
+fn sum_strings(v: Vec<&str>) -> Result<i32, &str> {
+    let mut sum = 0;
+    for x in v {
+        match x.parse::<i32>() {
+            Ok(val) => {
+                sum += val;
+            }
+            Err(_) => return Err("Given String is not a int"),
+        }
+    }
+    Ok(sum)
 }
 
-fn sum_strings(){
-}
-
-fn mul_strings(){
+/// Calculates the product of the given Strings and returns them as a Result.
+fn mul_strings(v: Vec<&str>) -> Result<i32, &str> {
+    let mut prod = 0;
+    for x in v {
+        match x.parse::<i32>() {
+            Ok(val) => {
+                prod *= val;
+            }
+            Err(_) => return Err("Given String is not a int"),
+        }
+    }
+    Ok(prod)
 }