Homework & Coursework Questions

I have the following piece of codes. Please explain it to me in great detail how are these codes working.

1. #include <stdio.h>
int main(){
int x;
x=0;
while (x<2 && fork()){
if (!fork()) execlp("echo","x++","x",0);
x++;
system("echo x+x");
}
}

2.

#include <stdio.h>
int i;
int main() {
for(i=0;i<2;i++){
if(fork())
fork();
}
printf ("%d\n", i);
system(("echo i++");
}


The attempts at a solution (include all code and scripts):[/B]
Output of 1:
x
x+x
x+x
x


Output of 2:
2
i++
2
i++
2
i++
2
i++
2
i++
2
i++
2
i++
2
2
i++
i++




Politechnico di Torino

Do not post classroom or homework problems in the main forums. Homework and coursework questions can only be posted in this forum under special homework rules.

Please review the rules, which you agreed to when you registered, if you have not already done so.

More-than-likely, posting homework in the main forums has resulting in a forum infraction. If you did not post homework, please explain the company you work for and the nature of the problem you are working on.

If you did post homework in the main forums, please review the guidelines for posting homework and repost.

Thank You.

The UNIX and Linux Forums.