83 lines
1.3 KiB
C++
83 lines
1.3 KiB
C++
#include <thread>
|
|
#include <string>
|
|
#include <iostream>
|
|
#include <chrono>
|
|
#include <vector>
|
|
#include <functional>
|
|
|
|
/*
|
|
* Compile with 'g++ -pthread a.cpp'
|
|
*
|
|
* Modifying an object
|
|
*/
|
|
|
|
using namespace std;
|
|
|
|
/*
|
|
* This method will push the addition of the last two elements on the vector.
|
|
*/
|
|
void manipulate(vector<double>& v) {
|
|
int sleep = 2;
|
|
for ( int i = 0; i < 5; i++ )
|
|
{
|
|
double a = 0;
|
|
|
|
// Only use the last two elements
|
|
int j = 0;
|
|
for ( auto rit = v.rbegin() ; rit != v.rend(); ++rit )
|
|
{
|
|
if ( j > 1 )
|
|
{
|
|
break;
|
|
}
|
|
|
|
a += *rit;
|
|
++j;
|
|
}
|
|
|
|
v.push_back( a);
|
|
std::cout << "Updated Vector" << std::endl;
|
|
|
|
this_thread::sleep_for(std::chrono::seconds(sleep));
|
|
}
|
|
}
|
|
|
|
void display(vector<double>& v) {
|
|
int sleep = 1;
|
|
for ( int i = 0; i < 10; i++ )
|
|
{
|
|
std::cout << "Vector is now:" << std::endl;
|
|
|
|
std::cout << "{";
|
|
for ( int i = 0; i < v.size() ; i++ ) {
|
|
std::cout << v[i] << ", ";
|
|
}
|
|
std::cout << "}" << std::endl;
|
|
this_thread::sleep_for(std::chrono::seconds(sleep));
|
|
}
|
|
}
|
|
|
|
|
|
struct my_f {
|
|
vector<double>& v;
|
|
|
|
my_f(vector<double>& vv): v(vv) {};
|
|
void my_function() { manipulate(v); };
|
|
};
|
|
|
|
int main() {
|
|
|
|
vector<double> v { 1.1, 1.1 };
|
|
thread t {display, ref(v)};
|
|
|
|
my_f f{v};
|
|
thread t2( &my_f::my_function, std::ref(f) );
|
|
|
|
|
|
// Run the threads
|
|
t.join();
|
|
t2.join();
|
|
|
|
return 0;
|
|
}
|