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 C-language source code.

 

#include <stdio.h>

#include <string.h>

#include <sys/types.h>

 

#define  MAX_COUNT 50

#define  BUF_SIZE  100

 

void main(void)

{

    pid_t pid;

    int   i;

    char  buf[BUF_SIZE];

 

    fork();

    pid = getpid();

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

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

         write(1, buf, strlen(buf));

    }

}