placed projects into docs folder

docs/projects/randomNumberGeneratorExamples/srand.cc

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+#include <iostream>
+#include <string>
+#include <stdlib.h> // srand/rand
+#include <sys/types.h> // getpid
+#include <unistd.h>
+using namespace std;
+
+void createRandomRow(int*& row, int size) {
+    row = new int[size];
+    for (int i = 0; i < size; ++i) row[i] = rand()%100;
+} // createRandomRow
+
+
+int main(int argc, char* argv[]) {
+    int seed = getpid();
+    if ( argc == 2 ) seed = stoi(string{argv[1]});
+    srand(seed); // only seed the random number generator once!
+
+    int *row = nullptr;
+    int size = rand() % 5 + 5;
+    createRandomRow(row, size);
+    cout << "row: ";
+    for (int i = 0; i < size; ++i) cout << row[i] << ' ';
+    cout << endl;
+    delete [] row;
+} // main