Question: Write a program that will create three user level threads. Inside one thread take input of two numbers, inside second thread make a choice (i.e. press 1 for addition operation and press 2 for subtraction operation of that two numbers and inside the last thread display the result of corresponding operations(add or subtract) according to the selection in thread 2.
In the main function create a child and inside the child call all these threads to perform your operations. Inside the parent method just just display "Operations are done! Congrats". You must ensure that the main function must wait until all the child and in terminated.
Code :
#include<pthread.h>#include<stdio.h>#include <sys/types.h>#include<sys/wait.h>#include <unistd.h>int value=0;int x=0,y=0;int q=0;int add=0,sub =0;void *input_value(void *param);void *choice(void *param);void *display(void *param);int main(int argc,char *argv[]){int pid;pthread_t tid1,tid2,tid3;
pid=fork();if(pid==0){
pthread_create(&tid1,NULL,input_value,NULL);pthread_join(tid1,NULL);pthread_create(&tid2,NULL,choice,NULL);pthread_join(tid2,NULL);}else if(pid>0){ wait(NULL);printf("\n\nOperations are Done ! congrats");} }void *input_value(void *param){ printf("first value input: "); int a,b; scanf("%d",&a); x=a; printf("Secend value input: "); scanf("%d",&b); y =b; pthread_exit(0);}
void *choice(void *param){ int add,sub,ch; printf("press 1 for addition & press 2 for Subtraction: "); scanf("%d",&ch); q = ch; if(q ==1){ pthread_t tid3; add= x+y; pthread_create(&tid3,NULL,display,&add); pthread_join(tid3,NULL); } else if (q == 2){ pthread_t tid3; sub= y - x; pthread_create(&tid3,NULL,display,&sub); pthread_join(tid3,NULL); }pthread_exit(0);}void *display(void *param){ if(q == 1){ int* addition = (int*)param; int add2 = *addition; printf("addition value is : %d",add2); } else if (q ==2){ int* Subtraction = (int*)param; int sub2 = *Subtraction; printf("Subtraction value is : %d",sub2); } pthread_exit(0);}
#include<pthread.h>
#include<stdio.h>
#include <sys/types.h>
#include<sys/wait.h>
#include <unistd.h>
int value=0;
int x=0,y=0;
int q=0;
int add=0,sub =0;
void *input_value(void *param);
void *choice(void *param);
void *display(void *param);
int main(int argc,char *argv[])
{
int pid;
pthread_t tid1,tid2,tid3;
pid=fork();
if(pid==0){
pthread_create(&tid1,NULL,input_value,NULL);
pthread_join(tid1,NULL);
pthread_create(&tid2,NULL,choice,NULL);
pthread_join(tid2,NULL);
}
else if(pid>0){
wait(NULL);
printf("\n\nOperations are Done ! congrats");
}
}
void *input_value(void *param){
printf("first value input: ");
int a,b;
scanf("%d",&a);
x=a;
printf("Secend value input: ");
scanf("%d",&b);
y =b;
pthread_exit(0);
}
void *choice(void *param){
int add,sub,ch;
printf("press 1 for addition & press 2 for Subtraction: ");
scanf("%d",&ch);
q = ch;
if(q ==1){
pthread_t tid3;
add= x+y;
pthread_create(&tid3,NULL,display,&add);
pthread_join(tid3,NULL);
}
else if (q == 2){
pthread_t tid3;
sub= y - x;
pthread_create(&tid3,NULL,display,&sub);
pthread_join(tid3,NULL);
}
pthread_exit(0);
}
void *display(void *param){
if(q == 1){
int* addition = (int*)param;
int add2 = *addition;
printf("addition value is : %d",add2);
}
else if (q ==2){
int* Subtraction = (int*)param;
int sub2 = *Subtraction;
printf("Subtraction value is : %d",sub2);
}
pthread_exit(0);
}