多进程问题

int main(void)

{

    pid_t cpid;
    cpid = fork();

    if (cpid == -1){
        perror("[ERROR] fork(): ");
        exit(EXIT_FAILURE);

    }else if(cpid == 0){ 

        printf("The ChildA process < %d > running...\n",getpid());
        sleep(2);
        exit(88);

    }else if(cpid > 0){ 

 		cpid = fork();
        if (cpid == -1){
            perror("fork(): ");
        }else if (cpid == 0){ // second process

            printf("The childB process < %d > running...\n",getpid());
            sleep(2);
            exit(99);
            
        }else if (cpid > 0){
           	int status,rpid=0; 	
			rpid=wait(&status);
			
			if (rpid == -1){
           		 perror("[ERROR] wait() : ");
           		 exit(EXIT_FAILURE);
        	}

       		 printf("The Child Process < %d > has exited,exit code < %d >.\n",rpid,WEXITSTATUS(status));//通过 WEIXTSTATUS() 宏定义获取	
			 rpid=wait(&status);
			if (rpid == -1){
    	        perror("[ERROR] wait() : ");
        	    exit(EXIT_FAILURE);
        	}

       		 printf("The Child Process < %d > has exited,exit code < %d >.\n",rpid,WEXITSTATUS(status));//通过 WEIXTSTATUS() 宏定义获取


        }


        
    }   

    

    

    return 0;

}

老师这个代码执行的顺序是怎么样的呢，是先创建了子进程A还是子进程B，然后wait回调的时候是进程B先回来还是B进程先回来，还是说是随机的