多线程打印ABC

单线程打印ABC

#include <vector>
#include <thread>
#include <iostream>
#include <mutex>
using namespace std;

mutex sLock;
int i = 0;
void test()
{
    sLock.lock();
	for (int j = 0; j < 10; j++)
	{

		i++;
		char c = 'A'+ (i-1)%3;
		cout<< c << " ";
		if(!(i%3))
            cout<<endl;

	}
	sLock.unlock();
}

int main()
{
/*	vector<thread> v;

	for (int j = 0; j < 1; j++)
	{
		v.emplace_back(test);
	}

	for(auto& t : v)
	{
		t.join();
	}
*/
    thread t1(test);
    t1.join();

	return 0;
}

多线程打印

#include <iostream>
#include <mutex>
#include <thread>
#include <condition_variable>

using namespace std;

mutex mux;
condition_variable conf;
int choose = 1;

void PrintA()
{
    unique_lock<mutex> loc(mux);
    int cnt = 10;
    while(cnt>0)
    {
        while(choose != 1)
           conf.wait(loc);
        cout << 'A' <<endl;
        cnt--;
        choose = 2;
        conf.notify_all();
    }
}

void PrintB()
{
    unique_lock<mutex> loc(mux);
    int cnt = 10;
    while(cnt>0)
    {
        while(choose != 2)
           conf.wait(loc);
        cout << 'B' <<endl;
        cnt--;
        choose = 3;
        conf.notify_all();
    }
}

void PrintC()
{
    unique_lock<mutex> loc(mux);
    int cnt = 10;
    while(cnt>0)
    {
        while(choose != 3)
           conf.wait(loc);
        cout << 'C' <<endl;
        cnt--;
        choose = 1;
        conf.notify_all();
    }
}

int main()
{
    thread t1(PrintA);
    thread t2(PrintB);
    thread t3(PrintC);
    t1.join();
    t2.join();
    t3.join();
    return 0;
}