In python how do you write for prime factors
1 answer:
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The Hierarchical drawing of the In- House solutions includes Four categories such as product, service, training, support and about.
<h3>What is Hierarchical drawing?</h3>Hierarchical drawing is also known as Layered Graph Drawing which includes the drawing in the vertices and are made on the Horizontal rows and layers.
The complete solution is attached below.
The In-House solutions' hierarchical diagram covers four categories, including product, service, training, support, and about.
Learn more about Hierarchical drawing here:
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Answer:
a)
#include<stdio.h>
#include<stdlib.h>
#include<fcntl.h>
#include<unistd.h>
#define BUFSIZE 16
int main(){
//pipe descriptors
char msg[BUFSIZE];
char buf[BUFSIZE];
int pipefd[2];
if(pipe(pipefd) == -1){
//pipe creation error
perror("pipe");
exit(EXIT_FAILURE);
}
//pipe creation successfull
//write four messages
sprintf(msg , "apple");
write(pipefd[1], msg, BUFSIZE);
printf("Written %s\n", msg);
sprintf(msg , "boy");
write(pipefd[1], msg, BUFSIZE);
printf("Written %s\n", msg);
sprintf(msg , "cat");
write(pipefd[1], msg, BUFSIZE);
printf("Written %s\n", msg);
sprintf(msg , "dog");
write(pipefd[1], msg, BUFSIZE);
printf("Written %s\n", msg);
//read
read(pipefd[0], buf, BUFSIZE);
printf("Read: %s\n", buf);
read(pipefd[0], buf, BUFSIZE);
printf("Read: %s\n", buf);
read(pipefd[0], buf, BUFSIZE);
printf("Read: %s\n", buf);
read(pipefd[0], buf, BUFSIZE);
printf("Read: %s\n", buf);
close(pipefd[0]);
close(pipefd[1]);
return 0;
}
(b)
#include<stdio.h>
#include<stdlib.h>
#include<fcntl.h>
#include<unistd.h>
#include<wait.h>
#define BUFSIZE 16
int main(){
//pipe descriptors
char msg[BUFSIZE];
char buf[BUFSIZE];
int pipefd[2];
if(pipe(pipefd) == -1){
//pipe creation error
perror("pipe");
exit(EXIT_FAILURE);
}
//pipe creation successfull
//write four messages
if(fork() == 0){
//this is child
//close unused write end
close(pipefd[1]);
read(pipefd[0], buf, BUFSIZE);
printf("This is child process reading first message. Content is %s\n", buf);
read(pipefd[0], buf, BUFSIZE);
printf("This is child process reading second message. Content is %s\n", buf);
read(pipefd[0], buf, BUFSIZE);
printf("This is child process reading third message. Content is %s\n", buf);
read(pipefd[0], buf, BUFSIZE);
printf("This is child process reading fourth message. Content is %s\n", buf);
close(pipefd[0]);
//exit from child
exit(EXIT_SUCCESS);
}
//this is parent process
//close unused read end
close(pipefd[0]);
sprintf(msg , "apple");
printf("This is parent process. Writing first message into pipe\n");
write(pipefd[1], msg, BUFSIZE);
sprintf(msg , "boy");
printf("This is parent process. Writing second message into pipe\n");
write(pipefd[1], msg, BUFSIZE);
sprintf(msg , "cat");
printf("This is parent process. Writing third message into pipe\n");
write(pipefd[1], msg, BUFSIZE);
sprintf(msg , "dog");
printf("This is parent process. Writing fourth message into pipe\n");
write(pipefd[1], msg, BUFSIZE);
close(pipefd[1]);
//wait for child
wait(NULL);
return 0;
}
(c)
#include<stdio.h>
#include<stdlib.h>
#include<fcntl.h>
#include<unistd.h>
#include<sys/wait.h>
#include<sys/types.h>
#include<signal.h>
typedef struct sigaction Sigaction;
unsigned long long size = 0;
void alarmhandler(int sig){
//alarm fired writing blocked
printf("Write blocked after %llu characters\n", size);
exit(EXIT_SUCCESS);
}
int main(){
//pipe descriptors
int pipefd[2];
if(pipe(pipefd) == -1){
//pipe creation error
perror("pipe");
exit(EXIT_FAILURE);
}
//install handler
sigset_t mask , prev;
sigemptyset(&mask);
sigaddset(&mask , SIGALRM);
sigprocmask(SIG_BLOCK , &mask , &prev);
Sigaction new_action;
sigemptyset(&new_action.sa_mask);
new_action.sa_flags = SA_RESTART;
new_action.sa_handler = alarmhandler;
sigaction(SIGALRM , &new_action , NULL);
sigprocmask(SIG_SETMASK , &prev, NULL);
while(1){
//print size on multiple of 4
if(size != 0 && size % 1024 == 0){
printf("%llu characters in pipe\n", size);
}
//reset previous alarm
alarm(0);
//set new alarm for 5 seconds
alarm(5);
//write to pipe one character
write(pipefd[1], "A", sizeof(char));
size++;
}
return 0;
}
Explanation:
Output for a, b, c are pasted accordingly
