Question

For this week, please describe in your own words what multithreading is and how can multiple threads run simultaneously on a single-processor system? Provide small code example and the result/output of running your code to demonstrate this behavior. Write a few sentences explaining your code and the result/output of running your code.

Answer 1

Multithreading:

Multithreading is running multiple functions or methods
at a time i.e multiple independent tasks are performed
parallely.These tasks run in threads.

C++ code is explained in commments:

#include <thread>
#include <iostream>

using namespace std;

void task1() { //create task 1 which will be run by thread 1
for(int i=0;i<5;++i){//lets do this to check task1 progress by task1
cout<<"Task1 :"<<i<<endl;
}
}

void task2() { //create task2 which will run by thread 2
for(int i=0;i<5;++i){//lets do this to check task1 progress by task2
cout<<"Task2 :"<<i<<endl;
}
}

int main (int argc, char ** argv) {
thread thread_1(task1);//run thread1 calls task1 function or method independently without blocking the next instruction
thread thread_2(task2);//now it will run thread2 calls task1 function or method independently

thread_2.join(); //you can wait here all threads to complete
thread_1.join();
return 0;
}

From below output task1 and task2 outputs parallely by thread 1 and thread2
//output: