20181224, add sshpass, boost_fs examples.

boost/filesystem/test0.cpp

+// g++ test0.cpp -I /usr/include/filesystem -L /usr/lib/x86_64-linux-gnu/ -lboost_filesystem  -lboost_system
 #include <unistd.h>
 #include <iostream>
+#include <vector>
+#include <string>
+#include <boost/filesystem.hpp>
+namespace fs = boost::filesystem;
 
 using namespace std;
 
 int main (){
+  fs::path path("data/go");
+  cout << path << endl;
+  cout << path.has_filename() << endl;
+  cout << path.filename() << endl;
+  path /= "1.bin";
+  cout << path << endl;
+  cout << path.has_filename() << endl;
+  cout << path.filename() << endl;
+  cout << system_complete(path) << endl; // 
+  cout << path.is_absolute() << endl;
+  cout << path.extension() << endl;
+  cout << path.root_path() << endl;
+  cout << path.root_name() << endl;
+  cout << path.relative_path() << endl;
+  cout << path.root_directory() << endl;
+  path = system_complete(path);
+  cout << path.is_absolute() << endl;
+
   char file_name[] = "b";
+
   if ( 0 == access(file_name, 0) )  cout<<"access(): path exist."<<endl;
   return 0;
 }
+
+int get_filenames(const std::string& dir, std::vector<std::string>& filenames)
+{
+    fs::path path(dir);
+    if (!fs::exists(path)){
+        return -1;
+    }
+    fs::directory_iterator end_iter;
+    for (fs::directory_iterator iter(path); iter!=end_iter; ++iter){
+        if (fs::is_regular_file(iter->status())){
+            filenames.push_back(iter->path().string());
+        }
+ 
+        if (fs::is_directory(iter->status())){
+            get_filenames(iter->path().string(), filenames);
+        }
+    }
+    return filenames.size();
+}

boost/filesystem/test1/test1.cpp

@@ -5,6 +5,8 @@ namespace fs = boost::filesystem;
 using namespace std;
 
 int main(){
+  fs::path path("data/go/1.bin");
+  cout << path.filename() << endl;
   cout << fs::exists("a") << endl;
   cout << fs::exists("b") << endl;
   cout << fs::is_directory("b") << endl;

c++file/binary_read_write/main.cpp

+// g++ main.cpp -std=c++11
+#include <iostream>
+#include <vector>
+#include <string>
+#include <fstream>
+
+using namespace std;
+
+void read(const string file, vector<vector<float> >& feas, 
+    vector<vector<float> >& pis, vector<float>& vs){
+  int steps_in = 0;
+  float winner_in = 0.0;
+  char feas_in[1000 * 17*19*19];
+  float pis_in[1000 * 362]; 
+  std::ifstream input(file, ios::in | ios::binary);
+  input.read((char*)&steps_in, sizeof(int));
+  // CHECK_LE(steps_in, 1000);
+  input.read((char*)&winner_in, sizeof(float));
+  input.read((char*)feas_in, sizeof(char) * 19*19*17 * steps_in);
+  input.read((char*)pis_in, sizeof(float) * (19*19+1) * steps_in);
+  input.close();
+  feas.resize(steps_in);
+  pis.resize(steps_in);
+  vs.resize(steps_in);
+  for (int step = 0; step < steps_in; ++step){
+    feas[step].resize(17*19*19);
+    pis[step].resize(1+19*19);
+    for (int j = 0; j < 17*19*19; ++j){
+      feas[step][j] = feas_in[step*17*19*19 + j] ? 1.0 : 0.0;
+    }
+    for (int j = 0; j < 1+19*19; ++j){
+      pis[step][j] = pis_in[step*(1+19*19)+j];
+    }
+    if ((step%2==0)^(winner_in==1.0)){ // self lose
+      vs[step] = -1.0;
+    }else{
+      vs[step] = 1.0;
+    }
+  }
+}
+
+void write(const string file){
+  int steps_out = 400;
+  float winner_out = 1.0;
+  unsigned char feas_out[1000 * 17*19*19];
+  float pis_out[1000 * 362]; 
+  for (int i = 0; i < steps_out; ++i){
+    for (int j = 0; j < 19*19; ++j){
+      for (int c = 0; c < 17; ++c){
+        feas_out[i*17*19*19+j*17+c] = (c == i%17 && j <= i%361) ? (unsigned char)1 : (unsigned char)0;
+      }
+    }
+    for (int j = 0; j < 362; ++j){
+      pis_out[i * 362 + j] = float(i + j * 0.001);
+    }
+  }
+  std::ofstream output(file, ios::out | ios::binary );
+  output.write((char*)&steps_out, sizeof(int));
+  // CHECK_LE(steps_out, 1000);
+  output.write((char*)&winner_out, sizeof(float));
+  output.write((char*)feas_out, sizeof(char) * 19*19*17*steps_out);
+  output.write((char*)pis_out, sizeof(float) * (19*19+1) * steps_out);
+  output.close();
+}
+
+int main (){
+  write("test.bin");
+  vector<vector<float> > feas;
+  vector<vector<float> > pis;
+  vector<float> vs;
+  read("test.bin", feas, pis, vs);
+
+  cout << feas.size() << ", " << pis.size() << ", " << vs.size() << ", " << endl;
+  for (int i = 0; i < feas.size(); ++i){
+    cout << "========" << i << "======" << endl;
+    for (int j = 0; j < 19*19; ++j){
+      for (int c = 0; c < 17; ++c){
+        cout << feas[i][j*17+c] << ", ";
+      }
+      cout << endl;
+    }
+    for (int j = 0; j < pis[i].size(); ++j){
+      cout << pis[i][j] << ", ";
+    }
+    cout << endl << vs[i] << endl;
+  }
+  return 0;
+}

c++rand/main.cpp

@@ -11,5 +11,6 @@ int main()
         j=1+(int)(10.0 * rand()/(RAND_MAX+1.0));
         printf("%d ",j);
     }
-        printf("\n");
+    printf("\n");
+    return 0;
 }

c++rand/random.cpp

+// g++ random.cpp  -std=c++11
 #include <random>
 #include <iostream>
 

c++sleep/main.cpp

-#include <stdlib.h>
 #include <iostream>
 #include <unistd.h>
 
@@ -6,9 +5,9 @@ using namespace std;
 
 int main(){
   for (int i = 0; i < 10; ++i){
-    sleep(2);
+    sleep(1);
     cout << "1" << endl;
-    usleep(2000000);
+    usleep(500000);
     cout << "2" << endl;
   }
   return 0;

c++string/main1.cpp

 #include <string>
+#include <algorithm>
+#include <vector>
 #include <iostream>
 
 using namespace std;
 
 int main(){
-  string a("aaaaassfaaaaa ff ");
-  string b("ccc");
-  string c("ff");
+  string a("1.bin.finish");
+  string b(".finish");
+  string c("1.bin");
+  vector<string> v;
+  v.push_back(a);
+  v.push_back(b);
+  v.push_back(c);
   cout << string::npos << endl;
   cout << a.find(b) << endl;
-  cout << a.find(c) << endl;
-  cout << a.find("f") << endl;
+  if (string::npos != a.find(b)){
+    cout << a << " find " << b << ", at " << a.find(b) << endl;
+    cout << a.substr(0, a.find(b)) << " + " << b << " = " << a << endl;
+  }
+  vector<string>::iterator it_str = find(v.begin(), v.end(), c);
+  cout << (it_str == v.end()) << ", " << *it_str << endl;
   return 0;
 }

c++system/main.cpp

@@ -8,7 +8,6 @@ using namespace std;
 int main(){
   stringstream ss;
   string s = "c.";
-  system("nvidia-smi");
   system(("touch " + s + "out").c_str());
   ss << "mv " << "c.out " << "b.out";
   system(ss.str().c_str());

c++system/sshpass.cpp

+#include <stdlib.h>
+#include <iostream>
+#include <sstream>
+#include <string>
+
+using namespace std;
+
+int main(){
+  system("sshpass -p \"sxk123\" scp -o StrictHostKeyChecking=no root@47.94.192.213:/root/b.exe .");
+  return 0;
+}

c++vector/main.cpp

+#include <iostream>
+#include <vector>
+
+using namespace std;
+
+int main(){
+  vector<int> a(5,1);
+  cout << a.size() << endl;
+  a.erase(a.begin()+2);
+  cout << a.size() << endl;
+  a.pop_back();
+  cout << a.size() << endl;
+  return 0;
+}