CS 10 SI Lab Session 5 Exercise 3 Solutions

ex3p1.cpp

#include <iostream>

using namespace std;

void print_rect(int, int); // we declare the function here 

int main() {
  int w, h;

  // We generally prompt the user for input in the main function 
  cout << "Enter width: ";
  cin >> w;

  cout << "Enter height: ";
  cin >> h;

  print_rect(w, h);

  return 0;
}

void print_rect(int width, int height) {
  for (int i = 0; i < height; ++i) {
    for (int j = 0; j < width; ++j) {
      cout << "* ";
    }
    cout << endl;
  }
}

ex3p2.cpp

#include <iostream>

using namespace std;

void print_tri(int);

int main() {
  int h;

  cout << "Enter height: ";
  cin >> h;

  print_tri(h);

  return 0;
}

void print_tri(int height) {
  for (int i = 0; i < height; ++i) {
    for (int j = 0; j <= i; ++j) {
      cout << "* ";
    }
    cout << endl;
  }
}

ex3p3.cpp

#include <iostream>

using namespace std;

void print_pyr(int);

int main() {
  int h;

  cout << "Enter height: ";
  cin >> h;

  print_pyr(h);

  return 0;
}

void print_pyr(int height) {
  for (int i = 0; i < height; ++i) {
    for (int j = 0; j < height - i - 1; ++j) {
      cout << "  ";
    }
    for (int k = 0; k < 1 + 2 * i; ++k) {
      cout << "* ";
    }
    cout << endl;
  }
}