11进程间通信

11进程间通信/1管道/pipe2.cpp

@@ -24,9 +24,9 @@ int main(){
  }
  else{
  read(fds[0],buf,BUF_SIZE);
- sleep(3);
  write(fds[1],str2,sizeof(str2));
  cout<<"fat:"<<buf<<endl;
+ sleep(3);
  }
 
 

11进程间通信/1管道/pipe3.cpp

@@ -0,0 +1,34 @@
+#include <iostream>
+#include <unistd.h>
+using namespace std;
+
+#define BUF_SIZE 30
+
+
+int main(){
+
+ int fds1[2],fds2[2];
+ char str[]="who are you";
+ char str2[]="thank you for your message";
+ pid_t pid;
+ char buf[BUF_SIZE];
+
+ pipe(fds1);
+ pipe(fds2);
+
+ pid=fork();
+ if(pid==0){
+ write(fds2[1],str,sizeof(str));
+ read(fds1[0],buf,BUF_SIZE);
+ cout<<"child:"<<buf<<endl;
+ }
+ else{
+ read(fds2[0],buf,BUF_SIZE);
+ write(fds1[1],str2,sizeof(str2));
+ cout<<"fat:"<<buf<<endl;
+ }
+
+
+ return 0;
+
+}