Remove output of '\0' in lab-8

LyricZhao · LyricZhao · commit 9289974a0501 · 2020-04-13T22:57:36.000+08:00
diff --git a/test/usr/pipe_test.rs b/test/usr/pipe_test.rs
@@ -30,10 +30,10 @@ pub fn main() -> usize {
         let ch: u8 = 0;
         loop {
             sys_read(pipefd[0] as usize, &ch as *const u8, 1);
-            string.push(ch as char);
             if ch == 0 {
                 break;
             }
+            string.push(ch as char);
         }
         println!("message received in child process = {}", string);
     } else {

Original file line number	Diff line number	Diff line change
`@@ -30,10 +30,10 @@ pub fn main() -> usize {`
`30`	`30`	`let ch: u8 = 0;`
`31`	`31`	`loop {`
`32`	`32`	`sys_read(pipefd[0] as usize, &ch as *const u8, 1);`
`33`		`- string.push(ch as char);`
`34`	`33`	`if ch == 0 {`
`35`	`34`	`break;`
`36`	`35`	`}`
	`36`	`+ string.push(ch as char);`
`37`	`37`	`}`
`38`	`38`	`println!("message received in child process = {}", string);`
`39`	`39`	`} else {`