Question : Write a program that will create three threads. One thread will take a sentence as input. Second thread separate the words from the sentence and third thread will display the words of the sentence.
In the main function create a child and inside the child call all these threads to perform your operations. Inside the parent method just display “Operations are done! Congrats”. You must ensure that the main function must wait until the child and thread execution terminates.
Code:
#include<pthread.h>
#include<stdio.h>
#include <string.h>
#include <sys/types.h>
#include<sys/wait.h>
#include <unistd.h>
char *array[20];
char str[20];
void *read_set(void *param);
void *separate_word(void *param);
void *display(void *param);
//main fuction ;
int main(int argc,char *argv[]) {
int pid;
pthread_t tid1,tid2,tid3;
pid=fork();
if(pid==0){
pthread_create(&tid1,NULL,read_set,NULL);
pthread_join(tid1,NULL);
pthread_create(&tid2,NULL,separate_word,NULL);
pthread_join(tid2,NULL);
pthread_create(&tid3,NULL,display,NULL);
pthread_join(tid3,NULL);
//printf("I am child");
}else if(pid>0){
wait(NULL);
printf("\n\nOperations are Done ! congrats");
//printf("\n I am parent.")
}
}
//read_set function
void *read_set(void *param){
printf("Enter the Sentence: ");
scanf("%[^\n]%*c",str);
pthread_exit(0);
}
//separeate_word function
void *separate_word(void *param){
int i = 0;
char *p = strtok (str, " ");
while (p != NULL)
{
array[i++] = p;
p = strtok (NULL, " ");
}
pthread_exit(0);
}
//display function
void *display(void *param){
int i;
for (i = 0; i < 10; ++i)
printf("%s\n", array[i]);
pthread_exit(0);
}
Output :
