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