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#include <fdsf,,,``
 
int v=1;
int main (int argc, char *argv[]) {
printf(" uno %d v %d\n", getpid(), v);
int p1 = fork();
if(p1 == 0){
v++;
printf(" dos %d v %d\n", getpid(), v);
fork();
printf(" tres %d v %d\n", getpid(), v);
execlp("ls","ls",NULL);
v++;
printf(" cuatro %d v %d\n", getpid(), v);
fork();
v++;
printf(" cinco %d v %d\n", getpid(), v);
exit(1);
}
fork();
printf(" seis %d v %d\n", getpid(), v);
execlp("ls","ls",NULL);
v++;
printf(" siete %d v %d\n", getpid(), v);
fork();
v++;
printf(" ocho %d v %d\n", getpid(), v);
wait(NULL);
}
 

prog.cpp: In function ‘int main(int, char**)’:
prog.cpp:3:33: error: ‘getpid’ was not declared in this scope
 printf(" uno %d v %d\n", getpid(), v);
                                 ^
prog.cpp:3:37: error: ‘printf’ was not declared in this scope
 printf(" uno %d v %d\n", getpid(), v);
                                     ^
prog.cpp:4:15: error: ‘fork’ was not declared in this scope
 int p1 = fork();
               ^
prog.cpp:10:18: error: ‘NULL’ was not declared in this scope
 execlp("ls","ls",NULL);
                  ^~~~
prog.cpp:10:22: error: ‘execlp’ was not declared in this scope
 execlp("ls","ls",NULL);
                      ^
prog.cpp:16:7: error: ‘exit’ was not declared in this scope
 exit(1);
       ^
prog.cpp:20:18: error: ‘NULL’ was not declared in this scope
 execlp("ls","ls",NULL);
                  ^~~~
prog.cpp:20:22: error: ‘execlp’ was not declared in this scope
 execlp("ls","ls",NULL);
                      ^
prog.cpp:26:10: error: ‘wait’ was not declared in this scope
 wait(NULL);
          ^

Standard output is empty