Label can only be used as part of a statement Error

Question

I have been looking through the forums but I have not found an answer to this question that applies to my situation. I am trying to make a system call to using \'sort\' (unix),

Answer 1

When define a variable below a label, you shall tell the scope of the variable(using brace).

int processid;
switch(processid = fork())
{                 //establishing switch statement for forking of processes.
    case -1:
        perror("fork()");
        exit(0);
        break;
    case 0:
    {
        char *const parmList[] = {"usr/bin/sort","output.txt","-o","output.txt",NULL};  //execv call to sort file for names.
        break;
    }
    default:
        sleep(1);
        printf("\nChild process has finished.");
}