WBIT 3500 Architecture and Operating System

 

Assignment 8

Multi-Process and Multi-Thread Programming

 

 

Fork a Process

The following code can fork a child process. Both parent and child process can all print out 50 lines. Please modify the code to make parent process print out the even number of lines among the 50 lines, and the child process will only print out the odd number of lines. In your output message, please specify if the process is a parent process or a child process. And also output the process id.Please submit your source code, and the screenshot of the running result.

 

#include  <stdio.h>

#include  <string.h>

#include  <sys/types.h>

 

#define   MAX_COUNT  50

#define   BUF_SIZE   100

 

void  main(void)

{

pid_tpid;

inti;

charbuf[BUF_SIZE];

 

fork();

pid = getpid();

for (i = 1; i<= MAX_COUNT; i++) {

sprintf(buf, "This line is from pid %d, value = %d\n", pid, i);

write(1, buf, strlen(buf));

     }

}

 

Submission:

1.      Please submit your C language source code;

2.      Please submit at least two snapshots to show your compiling and running results under Cygwin.

 

Grading Rubric