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Random Number Generation

Random Number Generation. Pseudo-Random Generation. rand(). #include < iostream > using namespace std; int main() {   for( int i = 1; i <= 10; i ++) cout << rand() << endl ; return 0; }. rand(). First Execution.

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Random Number Generation

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  1. Random Number Generation

  2. Pseudo-Random Generation

  3. rand() #include <iostream> using namespace std; int main() {   for(inti = 1; i <= 10; i++) cout << rand() << endl; return 0; }

  4. rand() First Execution 3845773388773849487724339944523740082314611833432237844 #include <iostream> using namespace std; int main() {   for(inti = 1; i <= 10; i++) cout << rand() << endl; return 0; }

  5. rand() First Execution Second Execution 3845773388773849487724339944523740082314611833432237844 3845773388773849487724339944523740082314611833432237844 #include <iostream> using namespace std; int main() {   for(inti = 1; i <= 10; i++) cout << rand() << endl; return 0; }

  6. srand() #include <iostream> #include <ctime> #include <cstdlib> using namespace std; int main() { srand(time(NULL));   for(inti = 1; i <= 10; i++) cout << rand() << endl; return 0; }

  7. srand() First Execution 46453735342236578889937237165742245778614 #include <iostream> #include <ctime> #include <cstdlib> using namespace std; int main() { srand(time(NULL));   for(inti = 1; i <= 10; i++) cout << rand() << endl; return 0; }

  8. srand() First Execution Second Execution 46453735342236578889937237165742245778614 6877245768215576187851179738346117511735257868 #include <iostream> #include <ctime> #include <cstdlib> using namespace std; int main() { srand(time(NULL));   for(inti = 1; i <= 10; i++) cout << rand() << endl; return 0; }

  9. limiting range: [0, MAX_RAND] #include <iostream> #include <ctime> #include <cstdlib> using namespace std; int main() {   long next_value; srand(time(NULL));   for (inti = 1; i <= 100000; i++)     if (rand()%100 <= 34) cout << "hello" << endl; // ~35,000 times     else cout << "goodbye" << endl; // ~65,000 times   return 0; }

  10. End of Session

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