#include

#include

#include

#include

#include

#include

// how can I modify the following code to use waitpid() instead of wait()? All this code does is track the children of a fork(). thank you.

int main(){

if (fork()==0){

printf("1st child born! ");

} else {

printf("2nd child born! ");

wait(NULL);

printf("3rd child is born! ");

}